Hydroperoxide Patents (Class 526/230)
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Patent number: 5364581Abstract: A process for the rapid precipitation polymerization of acrylonitrile and a minor amount of a vinyl carboxylic acid comonomer in an environment of less than 10 ppm metal-ions to produce an acrylonitrile copolymer which, when pyrolyzed in an oxidizing atmosphere, produces a high quality carbon fiber.Type: GrantFiled: May 6, 1993Date of Patent: November 15, 1994Inventor: Kenneth Wilkinson
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Patent number: 5362827Abstract: This invention provides a process for preparing novel hydrophobically associating polymers containing cationic functionality which are useful for clean-up of waste waters containing organic contaminants. These water soluble polymers contain both water soluble and water insoluble monomers. The water soluble monomers are acrylamide (AM) and a salt of an unsaturated amine base (C), and the water insoluble monomer is a higher alkyl(meth)acrylamide or alkyl(meth)acrylate (R). These polymers are referred to as CRAM. The process relies on the dissolution of the water insoluble monomer(s) into an aqueous solution of water soluble monomers by means of a water miscible mutual cosolvent.Type: GrantFiled: July 27, 1992Date of Patent: November 8, 1994Assignee: Exxon Research & Engineering Co.Inventors: Jan Bock, Paul L. Valint, Thomas J. Pacansky, Henry W. H. Yang
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Patent number: 5344902Abstract: An improved polymerization process wherein starting material such as monomer, a mixture of monomers, a partially polymerized product, or a mixture of fully polymerized product and monomer or monomer mixture is reacted with an initiator such as an organic peroxide, hydroperoxide or perester and a quaternary ammonium salt under polymerization conditions wherein polymerization or further polymerization of the starting material is initiated. The initiator and quaternary ammonium salt are miscible with the polymerization mixture in the absence of solvent. An improved polymerization process is also provided wherein a crosslinked polymer structure is formed from an unsaturated polymer in a polymerizable monomer.Type: GrantFiled: November 30, 1992Date of Patent: September 6, 1994Assignee: Occidental Research CorporationInventors: H. James Harwood, Daniel H. Jones, Andrew W. Talkington, Stephen D. Goodrich
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Patent number: 5328972Abstract: A process for preparing polymers having molecular weights below 5,000 and polydispersity below 2.5 is provided. The polymerization is conducted in supercritical carbon dioxide at temperatures of at least 200.degree. C. and pressures above 3,500 psi. The process can be continuous, semi-continuous, or batch. The polymers are useful as detergent additives, scale inhibitors, dispersants and crystal growth modifiers.Type: GrantFiled: September 28, 1992Date of Patent: July 12, 1994Assignee: Rohm and Haas CompanyInventors: Emmanuel A. Dada, Willie Lau, Richard F. Merritt, Yi H. Paik, Graham Swift
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Patent number: 5314933Abstract: The present invention provides an anaerobic curing composition comprising a monofunctional or multifunctional acrylate or methacrylate as a polymerizable monomer having at least one functional vinyl group, 0.1 to 10 percent by weight of an organic peroxide and 0.1 to 10 percent by weight of at least one aromatic amine having a pKa of 6.5 to 9.0, based on the total weight of the monomer, which may be stored as a liquid for a long time and cures rapidly at anaerobic conditions, to form a strong bond between adjacent surfaces of, especially, metals, so that it is useful as an adhesive and sealant for metals.Type: GrantFiled: April 2, 1993Date of Patent: May 24, 1994Assignee: SKC LimitedInventors: Deog-Il Kim, Pil-Gyou Kwak, O-Gyoon Park
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Patent number: 5286821Abstract: A two-part initiator system useful in acrylic adhesive compositions comprising in one part a stable organoboron amine complex and in the second part an aldehyde destabilizer or activator. This initiator is particularly useful in elastomeric acrylic adhesive compositions and provides room temperature, relatively slow curing systems with good adhesive properties making them useful in applications where longer open times are required.Type: GrantFiled: March 17, 1992Date of Patent: February 15, 1994Assignee: National Starch and Chemical Investment Holding CorporationInventor: Martin M. Skoultchi
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Patent number: 5268437Abstract: This invention relates to high temperature aqueous processes for the polymerization of monoethylenically unsaturated carboxylic monomers to produce low molecular weight, water-soluble polymer products useful as detergent additives, scale inhibitors, dispersants and crystal growth modifiers. Suitable monomers include acrylic acid, methacrylic acid, maleic acid, maleic anhydride, crotonic acid, and itaconic acid. The reactions are run at temperatures ranging from about 130.degree. C. to 240.degree. C., preferably from about 140.degree. C. to about 230.degree. C. The process can be continuous, semi-continuous, or batch.Type: GrantFiled: January 22, 1992Date of Patent: December 7, 1993Assignee: Rohm and Haas CompanyInventors: Norman L. Holy, Newman M. Bortnick, Graham Swift, Kathleen A. Hughes
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Patent number: 5258465Abstract: An ester type polymeric peroxide; has a peroxide group of the formula (I): ##STR1## a group of the formula (I') ##STR2## a group of the formula (II) ##STR3## wherein X stands for one member selected from the group consisting of --CH.sub.2 --CH.sub.2 --, --C.tbd.C-- and ##STR4## continuously bound such that I and I' occur randomly in alternation with II, having a (I):(I') molar ratio in the range of from 9:1 to 1:9 and the [(I)+(I')]:(II) molar ratio in the range of from 6:4 to 4:6, and having an average molecular weight in the range of from 1,000 to 20,000, a polymerization initiator for vinyl type monomer comprising said ester type polymeric peroxide and method for the production of a block copolymer of vinyl type monomer by said polymerization initiator.Type: GrantFiled: May 21, 1991Date of Patent: November 2, 1993Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Shuji Suyama, Yasumasa Watanabe, Hideyo Ishigaki, Hiromi Kumura
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Patent number: 5247033Abstract: A polymerization method carried out in the presence of unsaturated hydroperoxides useful as molecular weight regulators, is disclosed. Also disclosed are polymers and oligomers made by this process and articles of manufacture comprising one or more polymers or oligomers made by this process. These molecular weight regulating hydroperoxides provide the ability to introduce an epoxy functionality to the oligomer or polymer as well as an additional functionality and a primary hydroxy group. Further, omega substituted or alpha, omega disubstituted polymers may be synthesized using the unsaturated hydroperoxides of the present invention.Type: GrantFiled: April 28, 1992Date of Patent: September 21, 1993Assignee: Akzo N.V.Inventors: Luc L. T. Vertommen, John Meijer
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Patent number: 5244988Abstract: Copolymers of aliphatic monoethylenically unsaturated dicarboxylic acids and unsaturated monomers have been formed by gradually and simultaneously adding monomers and initiator, in the presence of a metal salt activator, to a reaction vessel initially containing water at a temperature suitable for polymerization. These copolymers have consistent compositions and superior properties as antiscalants, dispersants and incrustation inhibitors.Type: GrantFiled: March 30, 1990Date of Patent: September 14, 1993Assignee: Rohm and Haas CompanyInventors: Kathleen A. Hughes, Graham Swift
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Patent number: 5239024Abstract: The invention relates to a process for the preparation of alternating copolymers from unsaturated polar compounds and olefins in the presence of complexing agents, in which the complexing agent comprising the primarily formed copolymer/metal compound complex can be recovered in a simple manner and in reusable form.The copolymerization is carried out in the presence of salts, such as nitrates, but preferably halides, of divalent metal ions as the complexing agent in organic solvents at pressures of up to about 100 bar and at temperatures between -78.degree. C. and 100.degree. C. with the use of free-radical initiators.The reaction product is a mixture of the copolymer of a strictly alternating structure of unsaturated polar compounds and olefin, and of a copolymer which is higher in the unsaturated polar compound. The alternating copolymer can be easily separated therefrom by extraction with solvents, such as trichloromethane or acetone.Type: GrantFiled: October 26, 1990Date of Patent: August 24, 1993Assignee: Hoechst AktiengesellschaftInventors: Claus D. Eisenbach, Ulrich Bulow, Wolfgang Lieberth, Hartmut Fischer
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Patent number: 5177164Abstract: A process for shortstopping a free radical polymerization of a conjugated diene and optionally a vinyl-substituted aromatic in an aqueous emulsion, using a hydroperoxide as initiator and a redox activator, comprising a divalent transition metal, a reducing agent and optionally being carried out in the presence of a modifier, and being performed by using as sole shortstopping agent an alkali metal polysulphide. This process results in the production of polymeric products which are free of carcinogenic nitrosamines.Type: GrantFiled: June 28, 1991Date of Patent: January 5, 1993Assignee: Shell Oil CompanyInventors: Sijtske M. De Vries, Johannes A. M. Willemsen
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Patent number: 5155192Abstract: This disclosure relates to storageable and/or transportable compositions containing a peroxydicarbonate to which an organic hydroperoxide, e.g. t-butyl hydroperoxide, has been added. The hydroperoxide serves to retard peroxydicarbonate decomposition. The compositions may be in the form of physical mixtures, aqueous dispersions or solutions in organic solvents.Type: GrantFiled: July 14, 1988Date of Patent: October 13, 1992Assignee: Akzo N.V.Inventors: Eltjo Boelema, Martinus C. Tammer, Johan Nuysink
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Patent number: 5115055Abstract: High molecular weight polymers of vinyl aromatic monomers are prepared by organic hydroperoxide initiated free radical polymerization in the presence of 5 to 5000 ppm of a soluble organic acid having pKa from 0.5 to 2.5.Type: GrantFiled: October 29, 1991Date of Patent: May 19, 1992Assignee: The Dow Chemical CompanyInventors: Virginia A. Dais, Duane B. Priddy
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Patent number: 5021487Abstract: The invention comprises a curable acrylic ester formulation which contains a maleimide thermal additive which is essentially miscible in conventional acrylic monomers. The formulation comprises a substantially solvent free adhesive formulation comprising:a) an acrylic functional maleimide compound of the formula: ##STR1## where the R.sub.1 groups are independently H or C.sub.1 -C.sub.3 alkyl, R.sup.2 is lower alkylene and R.sup.3 is defined as for R.sup.1 ;b) at least one acrylate or methacrylate monomer or prepolymer compound other than a compound as defined in a); and,c) an effective amount of an anaerobic or thermal free radical initiator.Type: GrantFiled: May 27, 1988Date of Patent: June 4, 1991Assignee: Loctite CorporationInventor: Philip Klemarczyk
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Patent number: 4943616Abstract: A polymerization process is provided for producing a terminally functional polymer which comprises introducing a monomer charge, a Lewis acid and an organic peroxy compound into a suitable reaction vessel and polymerizing the monomer charge at a temperature of from about 0.degree. to about -80.degree. C. to form the terminally functional polymer, wherein the monomer charge comprises isobutylene and the organic peroxy compound is charged in an amount of from about 10.sup.-4 to about 10.sup.-1 moles per mole of the isobutylene. In a preferred embodiment, the monomer charge additionally comprises vinylidene aromatic or diolefin monomers. In another preferred embodiment the monomer charge comprises the sequential addition of isobutylene and vinylidene aromatic or diolefin monomers. In a further preferred embodiment said reaction vessel is additionally charged with an electron door having an electron door number of from about 22 to about 50 the amount of said electron door being from about 10.sup.-4 to about 10.Type: GrantFiled: December 4, 1989Date of Patent: July 24, 1990Assignee: Polysar LimitedInventors: Munmaya K. Mishra, Akhtar Osman
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Patent number: 4908421Abstract: A polymerization process is provided for producing a terminally functional polymer which comprises introducing a monomer charge, a Lewis acid and an organic peroxy compound into a suitable reaction vessel and polymerizing the monomer charge at a temperature of from about 0.degree. to about -80.degree. C. to form the terminally functional polymer, wherein the monomer charge comprises isobutylene and the organic peroxy compound is charge in an amount of from about 10.sup.-4 to about 10.sup.-1 moles per mole of the isobutylene. In a preferred embodiment, the monomer charge additionally comprises vinylidene aromatic or diolefin monomers. The invention also provides a novel catalyst system comprising an organic peroxy compound and a Lewis acid for the polymerization of isobutylene or monomer mixtures containing isobutylene.Type: GrantFiled: July 26, 1988Date of Patent: March 13, 1990Assignee: Polysar LimitedInventors: Munmaya K. Mishra, Akhtar Osman
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Patent number: 4904749Abstract: Disclosed is a method for preparing poly(2-hydroxyethyl methacrylate) polymers (PHEMA) by a precipitation/suspension polymerization technique wherein a reaction mixture comprising hydroxyethyl methacrylate monomer (HEMA), solvent, and a free-radical initiator is subjected to heating for a time adequate for said PHEMA to be formed. The improvement in process of the present invention comprises restricting said HEMA to contain less than about 0.5 wt-% polyfunctional acrylate content, incorporating a suspending agent in said reaction mixture, agitating said reaction mixture during said heating, and restricting said solvent to one having a solubility parameter of between about 7.5 and 9, to produce PHEMA polymer particles ranging in size from about 30 to 1,000 microns and having a molecular weight ranging from about 500,000 to 2,000,000.Type: GrantFiled: December 16, 1988Date of Patent: February 27, 1990Assignee: Marion Laboratories, Inc.Inventors: Phyllis L. Brusky, Richard A. Markle
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Patent number: 4861849Abstract: This invention relates to a process for polymerizing an aqueous solution of an .alpha.,.beta.-ethylenically unsaturated monomer and at least one crosslinking monomer to produce a water-swellable polymer using sodium thiosulfate as a component of a redox initiator system. The use of sodium thiosulfate as a component of a redox initiator system for the polymerization allows for controlling the rate of initiation so as to increase the time required for gel formation during polymerization. The resulting hydrated polymer of the present invention breaks up more uniformly and with greater ease resulting in a higher per batch yield.Type: GrantFiled: January 15, 1988Date of Patent: August 29, 1989Assignee: The Dow Chemical CompanyInventor: Fredric L. Buchholz
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Patent number: 4816539Abstract: A vinyl chloride copolymer is produced by copolymerizing vinyl chloride monomer or a monomer mixture comoposed of vinyl chloride monomer and copolymerizable monomer, with one or more than one kind of cross-linking agent selected from polyhydric alcohol diglycidyl ether diacrylate and dimethacrylate. The vinyl chloride copolymer has good moldability and can be made into moldings having good matte finish surface and also good permanent compression set resistance, creep resistance, heat resistance, and electrical properties.Type: GrantFiled: December 16, 1987Date of Patent: March 28, 1989Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Junich Watanabe, Tohru Yokota
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Patent number: 4777230Abstract: A process is provided for the free radical polymerization of monomers derived from substituted or unsubstituted acrylic acid/methacrylic acid and esters thereof for the production of a polymer having a narrow molecular weight distribution and an average molecular weight of less than 4000. These polymers are produced by the solution polymerizing of said monomers wherein 20-40% by weight of the monomer composition is hydroxyalkyl acrylate or methacrylate in the presence of a solvent system suitable for high solids coating applications and in the presence of an initiating amount of a tertiary alkyl hydroperoxide and/or its derivatives having at least 5 carbons wherein the initiator and monomers, alone or in combination, are added continuously at a programmed rate wherein the rate of addition corresponds approximately to the rate of decomposition of said monomer and initiator. These polymers are used for high solids coating applications.Type: GrantFiled: December 12, 1986Date of Patent: October 11, 1988Assignee: Pennwalt CorporationInventor: Vasanth R. Kamath
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Patent number: 4764239Abstract: A curable composition including a monomer having at least one curable acrylic functionality, an accelerator and optionally a free radical initiator, wherein the accelerator is a compound of the formula ##STR1## wherein R' is H or alkyl; when R' is H, R is substituted or unsubstituted cyclohexyl, alkenylamino, or C.sub.3 -C.sub.10 branched alkyl; andwhen R' is alkyl, R is aralkyl.Such compositions are useful as fixturing (e.g., threadlocking) compositions, and overcome the problems of poor solubility in organic non-polar media and temperature constraints associated with the use of saccharin per se as an accelerator in such compositions.Also disclosed is a corresponding method of polymerizing compositions containing acrylic-functional compounds, and a method of making the substituted saccharin compounds from the corresponding substituted benzene sulfonamide.Alkenylamido-substituted saccharin compounds and alkyl, aralkyl-disubstituted saccharin compounds are specifically disclosed.Type: GrantFiled: August 4, 1986Date of Patent: August 16, 1988Assignee: Loctite CorporationInventors: Anthony F. Jacobine, David M. Glaser
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Patent number: 4668735Abstract: A polymaleate having an average molecular weight of 300 to 5000 is obtained by polymerizing a monoalkali metal maleate or monoammonium maleate at 80.degree. to 180.degree. C. in the presence of a polymerization initiator in an aqueous solvent.Type: GrantFiled: January 21, 1986Date of Patent: May 26, 1987Assignee: Kao CorporationInventors: Yasuhisa Fukumoto, Noboru Moriyama
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Patent number: 4658001Abstract: A random copolymer comprising specific groups represented by the general formula: ##STR1## and specific peroxycarbonate structural units represented by the general formula: ##STR2## is produced by a method which comprises causing a compound of the formula: ##STR3## to react with a compound of the formula: ##STR4##Type: GrantFiled: October 4, 1985Date of Patent: April 14, 1987Assignee: Nippon Oils & Fats Co., Ltd.Inventors: Kenji Kato, Yuji Okada, Kazuyoshi Aoshima
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Patent number: 4631317Abstract: Sulphonic acid-and sulphonate group-containing acrylonitrile polymers are advantageously obtained by precipitation copolymerization in aliphatic hydrocarbons using ethylenically unsaturated sulphonic esters free from carboxylic acid and carboxylic acid ester groups as comonomers and saponifying the sulphonic acid ester groups of the copolymer before, during or after shaping.Type: GrantFiled: November 19, 1984Date of Patent: December 23, 1986Assignee: Bayer AktiengesellschaftInventors: Joachim Konig, Siegfried Korte
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Patent number: 4609705Abstract: A molding composition is provided comprising aromatic vinyl ether and maleimide. The cured composition exhibits high heat distortion temperatures and is easily processed into finished products with or without a catalyst.Type: GrantFiled: February 21, 1985Date of Patent: September 2, 1986Assignee: General Electric CompanyInventors: James V. Crivello, Steven T. Rice
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Patent number: 4569977Abstract: Polymerizable acrylic monomers, and anaerobic adhesives which contain such monomers, wherein the acrylic monomers contain internal chain unsaturation in addition to terminal acrylic unsaturation.Type: GrantFiled: April 19, 1985Date of Patent: February 11, 1986Assignee: Eschem Inc.Inventor: Gerhardt P. Werber
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Patent number: 4473482Abstract: An amorphous, oil soluble ethylene/propylene/CO polymer having a mole ratio of ethylene to propylene from about 35:65 to 60:40 and lube oil compositions comprising said polymers.Type: GrantFiled: December 6, 1982Date of Patent: September 25, 1984Assignee: Standard Oil Company (Indiana)Inventors: Carl Serres, John G. Schaffhausen
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Patent number: 4460625Abstract: This invention concerns coating and impregnating compositions for concrete of an essentially anhydrous character comprising (1) a monomer blend of (a) dicyclopentenyl or dicyclopentenyloxyalkyl methacrylate or acrylate and (b) hydroxy alkyl methacrylate and (2) a polymerization catalyst of (a) an organic peroxide and an aromatic amine accelerator, or (b) a polyvalent metal salt or complex and an organic hydroperoxide, or (c) mixtures of (a) and 0.0005% to 2% by weight, based on total amount of monomers, of a polyvalent metal salt or complex, or (d) mixtures of (a) and (b), which can be applied to porous surfaces such as concrete as an impregnant and which can be polymerized in situ in order to reduce the permeability of the surface and to provide hard, continuous, hydrophobic, wear resistant and weather resistant surfaces.Type: GrantFiled: December 22, 1982Date of Patent: July 17, 1984Assignee: Rohm and Haas CompanyInventors: William D. Emmons, Joseph A. Lavelle
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Patent number: 4414374Abstract: The terpolymers disclosed herein comprise 60-87 percent by weight butadiene, 10-30 percent styrene and 3-15 percent N, N-dialkylacrylamide in the polymer molecules. These are prepared by emulsion polymerization using a free radical generating initiator system. These terpolymers have excellent green strength and are useful in tire compositions.Type: GrantFiled: June 1, 1981Date of Patent: November 8, 1983Assignee: The Firestone Tire & Rubber CompanyInventors: Binnur Gunesin, Adel E. Halasa
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Patent number: 4410644Abstract: A flowable anaerobic sealant composition adapted to be applied to a threaded surface which is characterized by being stable prior to curing is provided which composition comprises a polymerizable acrylate ester monomer, a hydroperoxide polymerization catalyst for said acrylate ester monomer in an amount sufficient to cause said monomer to polymerize under anaerobic conditions, a quinone polymerization inhibitor in an amount sufficient to prevent said monomer from polymerizing when standing for long periods of time, an organic sulfimide accelerator in an amount sufficient to increase the rate of polymerization of said monomer under anaerobic conditions, and a plasticizer in an amount sufficient to render the solidified sealant composition relatively non-brittle.Type: GrantFiled: December 7, 1981Date of Patent: October 18, 1983Assignee: Cajon CompanyInventor: James L. Bunyan
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Patent number: 4400413Abstract: There are disclosed polymer concrete compositions of essentially anhydrous character comprising (1) an inert inorganic particulate material, such as sand, crushed stone or rock, and mixtures thereof, mixed with (2) a monomer blend of (a) dicyclopentenyloxyalkyl methacrylate or acrylate and (b) hydroxyalkyl methacrylate to form a paste or slurry suitable upon addition thereto of (3) a polymerization catalyst of (a) an organic peroxide and an aromatic amine accelerator, or (b) a polyvalent metal salt or complex and an organic hydroperoxide, or (c) mixtures of (a) and 0.0005% to 2% by weight, based on total amount of monomers, of a polyvalent metal salt or complex, or (d) mixtures of (a) and (b), to be used to form or to patch previously formed or laid, concrete floors and road pavements or as a coating for a variety of substrates such as metal and plastic sheet.Type: GrantFiled: July 16, 1981Date of Patent: August 23, 1983Assignee: Rohm and Haas CompanyInventors: William D. Emmons, Joseph A. Lavelle
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Patent number: 4387044Abstract: A safe, dry and free-flowing solid peroxide/unsubstituted or alkyl substituted benzoic acid composition is prepared by mixing the solid peroxide, such as diacyl peroxide, dialkyl peroxydicarbonate, dialkyl peroxide or alkylidene diperoxide, which melts above 30.degree. C., with solid benozic acid or an alkyl substituted benzoic acid, which melts above 40.degree. C. This solid peroxide composition is used as an initiator for the polymerization of ethylenically unsaturated monomers, such as styrene, and for curing of unsaturated polyester resins and diethylene glycol bis(allyl carbonate). This solid peroxide composition exhibits improved safety characteristics such as delayed ignition times when in contact with a flame and increased thermal stabilities compared to similar prior art peroxide formulations.Type: GrantFiled: October 5, 1981Date of Patent: June 7, 1983Assignee: Pennwalt CorporationInventors: Jose Sanchez, Solomon C. Westbrook, Jr.
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Patent number: 4384091Abstract: Acrylonitrile polymers and copolymers with good affinity for basic dyes without sulfonic acid groups containing comonomers are obtained by polymerizing at a temperature of from 0.degree. to 60.degree. C. in an aliphatic hydrocarbon having a boiling point of from -10.degree. to 80.degree. C. or in a mixture of aliphatic hydrocarbons having boiling points in the range from -10.degree. to 80.degree. C. using an initiator system comprising from 0.1 to 8.0 mole percent of sulfur dioxide, from 0.1 to 2.0 mole percent of a hydroperoxide which is soluble in the reaction medium and from 0.01 to 1.0 mole percent of an acid which is soluble in the reaction system in that polymerization is carried out continuously and in that an average residence time of from 10 minutes to 2 hours is maintained.Type: GrantFiled: October 9, 1981Date of Patent: May 17, 1983Assignee: Bayer AktiengesellschaftInventors: Siegfried Korte, Theo Neukam, Carlhans Suling
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Patent number: 4376719Abstract: Stable aqueous dispersions of free radical-generating polymerization initiators that are solid at temperatures above 0.degree. C. are prepared safely and efficiently by homogenizing a suspension of the initiator in an aqueous system that contains small amounts of a suspending agent and a wetting agent.Type: GrantFiled: July 15, 1981Date of Patent: March 15, 1983Assignee: Tenneco Chemicals, Inc.Inventors: Donald Goodman, Mario Q. Ceprini, Samuel Hoch, Marvin Koral
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Patent number: 4336365Abstract: The instant invention is directed to a process for the continuous preparation of polyisocyanates containing uretdione groups comprising dimerizing aromatic polyisocyanates which are free from uretdione groups in the presence of catalysts which accelerate the dimerization of isocyanates, at -30.degree. to 90.degree. C.Type: GrantFiled: February 2, 1981Date of Patent: June 22, 1982Assignee: Bayer AktiengesellschaftInventors: Artur Reischl, Bernd Quiring, Claus Rathjen
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Patent number: 4331795Abstract: A two liquid type adhesive composition is a combination of Composition A and Composition B both of which comprise an acrylic monomer and a butadiene type oligomer having a terminal ethylenically unsaturated group as major components.The Composition A further comprises an organic hydroperoxide and an aromatic amine and/or a pyridine derivative and the Composition B further comprises a cobalt salt of organic acid.Type: GrantFiled: July 16, 1980Date of Patent: May 25, 1982Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Kenkichi Ukita, Tatsuo Nakano, Ikuji Kishi
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Patent number: 4326051Abstract: The invention relates to a homopolymer or copolymer of acrylonitrile which comprises from 0 to 30% by weight, incorporated by polymerization, of comonomer units which are free from ionic groups, said polymers having a K-value of from 50 to 100, a dye absorption capacity for cationic dyes of at least 0.5% by weight, a conductivity, measured in dimethylformamide solution, of at least 10.mu. Siemens, and from 0.2 to 1.5% by weight of sulphur fixed to said polymer as well as to a process for the production thereof.Type: GrantFiled: July 21, 1980Date of Patent: April 20, 1982Assignee: Bayer AktiengesellschaftInventors: Carlhans Suling, Siegfried Korte, Theo Neukam
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Patent number: 4321349Abstract: Curable acrylate ester compositions having as an accelerator for the polymerization a hydrazine derivative of the formula R.sup.1 --HN--NH--CO--R.sup.2. Typical of the monomers are the polyalkyleneglycol dimethacrylates and the so-called urethane acrylates. Polymerization is preferably initiated by a peroxy compound such as cumene hydroperoxide, such a composition having anaerobic curing characteristics.Type: GrantFiled: May 27, 1980Date of Patent: March 23, 1982Assignee: Loctite CorporationInventor: Richard D. Rich
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Patent number: 4319013Abstract: Cationic polyelectrolytes in water-soluble powder form, applicable to the flocculation of municipal sludge comprise copolymers of acrylamide and of quaternized or salified dimethylamino-ethyl acrylate, containing in molar proportions 10 to 50% of cationic units distributed regularly along the copolymer chains. They have an intrinsic viscosity higher than 6 and a measured cationicity higher than 90% of the theoretical cationicity.Type: GrantFiled: May 12, 1978Date of Patent: March 9, 1982Assignee: Societe Francaise HoechstInventors: Jean Cabestany, Claude Trouve, Dominique Depernet
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Patent number: 4268642Abstract: The terpolymers disclosed herein comprise 60-87 percent by weight butadiene, 10-30 percent styrene and 3-15 percent vinyl benzyl chloride in the polymer molecules. These are prepared by emulsion polymerization using a free radical generating initiator system. These terpolymers have excellent green strength and are useful in tire compositions.Type: GrantFiled: March 24, 1980Date of Patent: May 19, 1981Assignee: The Firestone Tire & Rubber CompanyInventors: Binnur Gunesin, Adel F. Halasa
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Patent number: 4258715Abstract: Improved shaped polymeric articles, including ostomy seals, are obtained by radiation crosslinking an acrylamide polymer composition comprising a water-soluble acrylamide polymer plasticized with a quantity of a water-miscible polyol (containing water) that provides a soft, flexible and elastomeric composition.Type: GrantFiled: December 8, 1978Date of Patent: March 31, 1981Assignee: Diamond Shamrock CorporationInventor: Paul H. Goble
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Patent number: 4259462Abstract: A hardenable composition comprises (1) an acrylate and/or methacrylate monomer; (2) diisopropylbenzene dihydroperoxide as a hardener and a hardening accelerator.Type: GrantFiled: June 18, 1979Date of Patent: March 31, 1981Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Tatsuo Nakano, Shozo Hori, Ikuji Kishi
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Patent number: 4234711Abstract: This invention relates to liquid adhesive and/or sealing compositions capable of hardening or curing under exclusion of oxygen comprising dicyclopentenyloxyethyl acrylate and/or methacrylate and an organic peroxy compound having 3 to 18 carbon atoms selected from the group consisting of organic peroxides and organic hydroperoxides, preferably the latter, and an imide or amine accelerator.Type: GrantFiled: August 9, 1978Date of Patent: November 18, 1980Assignee: Rohm and Haas CompanyInventors: William D. Emmons, Vincent J. Moser
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Patent number: 4232141Abstract: An improved method for the polymerization of vinyl chloride or a monomer mixture mainly composed of vinyl chloride in an aqueous polymerization medium is proposed in which a water-insoluble polymerization initiator, being solid at room temperature as dispersed in the aqueous medium and having a particle size distribution of 50 .mu.m or finer, is added to the polymerization mixture which is maintained at a temperature where the half-life period of the initiator is 120 minutes or longer or, alternatively, over a duration equal to or shorter than one-tenth of the half-life period of the initiator at the temperature of the polymerization mixture. By this method the polymerization can be homogeneously proceeded to produce vinyl chloride polymers having a uniform particle size distribution, excellent heat stability and much less fish-eyes when fabricated into sheets.Type: GrantFiled: July 18, 1978Date of Patent: November 4, 1980Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Shunichi Koyanagi, Hajime Kitamura, Kazuhiko Kurimoto
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Patent number: 4228265Abstract: A process for producing a sulfur-curable acrylic rubber is provided which comprises radical-copolymerizing (1) an alkyl acrylate with (2) an alkenyl acrylate or methacrylate, or radical-copolymerizing (1) an alkyl acrylate, (2) an alkenyl acrylate or methacrylate, (3) an alkoxyalkyl acrylate and optionally (4) acrylonitrile. These acrylic rubbers can be cured at a rate as fast as those for curing diene-type rubbers, and the cured products exhibit superior properties without long heat-treatment after curing.Type: GrantFiled: March 27, 1979Date of Patent: October 14, 1980Assignee: Nippon Zeon Co. Ltd.Inventors: Tetsu Ohishi, Kohichi Handa, Haruo Ueno
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Patent number: 4218552Abstract: The invention relates to polymers and copolymers of pivaloyloxyalkyl methacrylates which contain structural units of the general formula ##STR1## where R.sup.1 is (CH.sub.2).sub.n.sbsb.1 --O (n.sub.1 =2 to 10) or (CH.sub.2 CH.sub.2 --O).sub.n.sbsb.2 (n.sub.2 =1 to 4) and to the method of their preparation and modification. The polymerization and copolymerization can be initiated by free-radical initiators of the peroxy type or by anionic initiators, e.g., alkali metal alkoxides or butyllithium, and carried out in a solution, bulk or suspension process in the presence of a crosslinking agent or without it. Anionic polymerization may result in stereoregular polymers or may be used for preparation of block copolymers by the "living" polymer technique. The polymers and copolymers can be modified by the partial or total conversion of the pivaloyloxyalkyl methacrylate units into hydroxyalkyl methacrylate units by selective hydrolysis, alcoholysis or other reaction.Type: GrantFiled: September 21, 1978Date of Patent: August 19, 1980Assignee: Ceskoslovenska akademie vedInventors: Stanislav Sevcik, Jiri Trekoval, Jan Holata, Jiri Stamberg
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Patent number: 4189560Abstract: New crosslinkable polymers, in particular polymerization products of 5-maleimidyl-isophthalic acid derivatives and 5-(nadic acid)-isophthalic acid derivatives and vinyl monomers and polycondensation products of the said isophthalic acid derivatives and diamines, diols or aminoalcohols and optionally a di-, tri- or tetra-carboxylic acid derivative are described. These polymers are distinguished by good processability and good solubility in customary organic solvents and are suitable for the manufacture of various industrial products, such as thin films, thick films and compression mouldings. spThis is a Divisional of application Ser. No. 696,349, filed on June 15, 1976, now U.S. Pat. No. 4,115,368, issued on Sept. 19, 1978.Type: GrantFiled: June 21, 1978Date of Patent: February 19, 1980Assignee: Ciba-Geigy CorporationInventors: Martin Roth, Roland Darms, Josef Pfeifer
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Patent number: 4187364Abstract: New crosslinkable polymers, in particular polymerization products of 5-maleimidyl-trimellitic acid derivatives and 3,5-bis-(maleimidyl)-phthalic acid derivatives and vinyl monomers and polycondensation products of the said imidyl compounds and diamines, diols or amino-alcohols and optionally a di-, tri- or tetra-carboxylic acid derivative are described. These polymers are distinguished by good processability and good solubility in customary organic solvents and are suitable for the manufacture of very diverse industrial products, such as thin and thick films and the like.Type: GrantFiled: July 6, 1978Date of Patent: February 5, 1980Assignee: Ciba-Geigy CorporationInventors: Roland Darms, Josef Pfeifer, Vratislav Kvita
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Patent number: RE31322Abstract: A process for producing a sulfur-curable acrylic rubber is provided which comprises radical-copolymerizing (1) an alkyl acrylate with (2) an alkenyl acrylate or methacrylate, or radical-copolymerizing (1) an alkyl acrylate, (2) an alkenyl acrylate or methacrylate, (3) an alkoxyalkyl acrylate and optionally (4) acrylonitrile. These acrylic rubbers can be cured at a rate as fast as those for curing diene-type rubbers, and the cured products exhibit superior properties without long heat-treatment after curing.Type: GrantFiled: September 23, 1981Date of Patent: July 26, 1983Assignee: Nippon Zeon Co. Ltd.Inventors: Tetsu Ohishi, Kohichi Handa, Haruo Ueno