Aromatic Or Cycloaliphatic Peroxy Compound Patents (Class 525/265)
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Patent number: 4412042Abstract: The present invention provides an improved process for preparing a polyolefin cross-linked by silane linkage by contacting a polyolefin modified with silane with water in the presence of a silanol condensation catalyst, the improvement comprising said polyolefin modified with silane being a reaction product produced by reacting an ethylene/.alpha.-olefin copolymer having a density of from 0.850 to 0.910 with a silane compound in the presence of a free radical generating agent, said ethylene/.alpha.-olefin copolymer being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in a vapor phase with substantially no solvent present and in the presence of a catalyst comprising an organoaluminum compound and a solid substance containing magnesium, and a metal selected from the group consisting of titanium, vanadium and mixture thereof.Type: GrantFiled: March 8, 1982Date of Patent: October 25, 1983Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Noboru Yamaoka, Mituji Miyoshi
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Patent number: 4403063Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: June 30, 1982Date of Patent: September 6, 1983Assignee: Hercules IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4376847Abstract: A process for polymerizing a styrene monomer or a styrene monomer having a rubber-like polymer dissolved therein by using, as the catalyst, an organic peroxide of the formula ##STR1## where R.sub.1 and R.sub.2 are the same or different radicals selected from the group consisting of hydrogen, alkyl radicals of from 1 to 5 carbon atoms, and phenyl. Preferably, the polymerization is continuously carried out by bulk or solution polymerization while the reaction mixture present in the polymerization zone is kept in such a mixed state as to make it substantially homogeneous.Type: GrantFiled: April 9, 1981Date of Patent: March 15, 1983Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Tetsuyuki Matsubara, Norifumi Ito, Yuzuru Ishida, Mune Iwamoto
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Patent number: 4369292Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: June 12, 1980Date of Patent: January 18, 1983Assignee: Hercules IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4361688Abstract: Novel peroxydicarbonates are provided in which the alkyl carbonate moiety is 2-alkyl-2-phenyl substituted. The compounds are useful as polymerization initiators of ethylenically unsaturated monomers, such as vinyl chloride, and as catalysts of unsaturated polyester resins. The subject peroxydicarbonates are characterized in that they are solid at room temperature, have ambient temperature stability in spite of a low 10 hour half-life temperature, and can normally be transported and stored without refrigeration.Type: GrantFiled: April 20, 1981Date of Patent: November 30, 1982Assignee: Argus Chemical CorporationInventors: Reidar Halle, David Peterson
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Patent number: 4354005Abstract: Formation of undesired by-product adduct during production of acrylonitrile-butadiene-styrene-acrylate copolymers is controlled by subjecting the inhibitor containing reaction mixture to a molecular-oxygen-containing gaseous atmosphere during addition of the acrylate monomer.Type: GrantFiled: October 9, 1981Date of Patent: October 12, 1982Assignee: Cosden Technology, Inc.Inventor: Richard Schwarz
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Patent number: 4343729Abstract: Disclosed are novel organic pigments adapted particularly for use as tillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: January 21, 1981Date of Patent: August 10, 1982Assignee: Hercules IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4342844Abstract: A process for the preparation of an organic peroxide master batch comprising about 20-60% by weight of an organic peroxide and about 40-80% by weight of a polymer capable of being cross-linked by the peroxide, is disclosed. The process comprises contacting particles of such a polymer, having a diameter from about 200 microns to about 20 millimeters, at a temperature from about 15.degree. C. to about 95.degree. C.Type: GrantFiled: December 4, 1980Date of Patent: August 3, 1982Assignee: Akzona IncorporatedInventors: Reinder Torenbeek, Jan D. van Drumpt, Gerrit F. Drost
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Patent number: 4336355Abstract: The invention relates to a process for preparing ABS polyblends by grafting large diene rubber particles in aqueous latices in the presence of oligomeric surfactants providing large grafted diene rubber particles in latices that are stable and essentially free of coagulum. The ABS polyblends recovered from such latices are free of hard spots and have superior toughness.Type: GrantFiled: October 20, 1980Date of Patent: June 22, 1982Assignee: Monsanto CompanyInventor: Wan C. Wu
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Patent number: 4314041Abstract: In a process for continuously producing an impact-resistant resin containing 5 to 30% by weight of a rubber by the solution-graft-polymerization of a monomer mixture of an aromatic vinyl compound and a vinyl cyanide compound in the presence of an ethylene-propylene-non-conjugated diene terpolymer rubber in an inert solvent comprising as essential component an aromatic hydrocarbon, two or more polymerizers connected in series are used; said rubber is fed to the first polymerizer in the form of a homogeneous solution in a part or whole of said monomers and/or said inert solvent, together with the remaining monomer or monomers and/or inert solvent; the rubber is kept in the dispersed state in the first polymerizer; said monomers are polymerized therein with stirring until the polymerization conversion reaches 40 to 80% by weight based on the monomers, and the remaining monomers are further polymerized with stirring in the second and succeeding polymerizers to substantially complete the polymerization.Type: GrantFiled: September 26, 1980Date of Patent: February 2, 1982Assignee: Japan Synthetic Rubber Co., Ltd.Inventors: Shin-ichi Shimokawa, Yuji Yamamoto
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Patent number: 4293666Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: June 23, 1980Date of Patent: October 6, 1981Assignee: Hercules IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4293667Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: June 23, 1980Date of Patent: October 6, 1981Assignee: Hercules IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4287318Abstract: A continuous process for preparing rubber reinforced resins which are copolymers of styrenic compound, acrylonitrile and diolefinic compound.Type: GrantFiled: March 27, 1980Date of Patent: September 1, 1981Assignee: Labofina S.A.Inventors: William J. I. Bracke, Emmanuel Lanza
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Patent number: 4258149Abstract: Unsaturated hydantoin derivatives of the formula ##STR1## where R.sub.1 and R.sub.2 are alkyl, R.sub.3 is vinyl, allyl, alkylene, substituted alkylene or polyvalent aralkyl, R.sub.4 is vinyl or allyl and n is 1 to 3, are coagents for curing polymeric compositions to improve their physical, chemical and electrical properties. These coagents are particularly useful in crosslinking PVC, polyethylene, chlorinated polyethylene and poly(ethylene/vinyl acetate) compositions.Type: GrantFiled: March 8, 1979Date of Patent: March 24, 1981Assignee: Ciba-Geigy CorporationInventors: Hyman W. Zussman, Martin Knell, Martin Dexter
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Patent number: 4247667Abstract: A method of crosslinking poly-.alpha.-olefin series resins, comprising the steps of subjecting a resin composition to graft reaction under a volume ratio of oxygen to the resin composition set at less than 0.1 and at temperatures ranging between the thermal decomposition temperature of the radical generating agent and 230.degree. C., said composition comprising at least one kind of poly-.alpha.-olefin series resin of polypropylene series resin, poly(butene-1) series resin or poly(4-methyl pentene-1) series resin; a radical generating agent of dibenzoyl peroxide or t-butyl perbenzoate; and a silane compound having the general formula of RR'SiY.sub.Type: GrantFiled: February 27, 1979Date of Patent: January 27, 1981Assignee: The Furukawa Electric Co., Ltd.Inventors: Akio Nojiri, Takashi Sawasaki, Toshio Koreeda
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Patent number: 4235982Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a watersoluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: May 25, 1978Date of Patent: November 25, 1980Assignee: Hercules, IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4233418Abstract: Disclosed is a process for the production of rubber-modified styrene copolymers, particularly high rubber content styrene copolymers, such as high rubber content ABS polymers, by suspension polymerization, comprising suspension polymerizing an admixture of polymerizable materials comprising styrene monomer, rubber polymer, and optional additional monomers copolymerizable therewith; and melt extruding the resultant rubber-modified styrene copolymer under extrusion conditions having a shear force sufficient to homogeneously disperse the rubber phase throughout the copolymer. Through the use of the process of the instant invention, high rubber content styrene copolymers may be produced in a single suspension step, with impact properties and surface appearance comparable to copolymers produced in the conventional two-step polymerization process.Type: GrantFiled: May 31, 1978Date of Patent: November 11, 1980Assignee: Cosden Technology, Inc.Inventors: Willy F. R. Lingier, Emmanuel Lanza, William J. I. Bracke
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Patent number: 4230833Abstract: A continuous, single stage process for grafting methyl methacrylate polymer or copolymer onto a synthetic rubber, and the resultant graft polymers which have a dispersed rubber phase in a continuous hard phase are disclosed.Type: GrantFiled: February 8, 1979Date of Patent: October 28, 1980Assignee: Rohm and Haas CompanyInventor: Marshall T. Purvis
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Patent number: 4230643Abstract: Copolymers of vinyl esters and crotonic acid are commonly prepared by polymerizing the monomers in bulk or in solution by means of a radical-forming initiator in the presence of a regulator. The polymers should be free from residual monomers and impurities as far as possible. This may be realized in that upon completion of the polymerization the unreacted monomers and other volatile impurities are removed from the reaction mixture by distillation. For this purpose, the use of an entrainer is advantageous. The copolymers are suitable as starting materials for adhesives and hair lacquers, hair setting lotions as well as hair sprays.Type: GrantFiled: October 31, 1978Date of Patent: October 28, 1980Assignee: Hoechst AktiengesellschaftInventors: Wilfried Eichhorn, Peter Seibel
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Patent number: 4228256Abstract: The use of a sequential and controlled addition of monomers during grafting to produce grafted elastomers results in blends of the grafted elastomer and a resinuous copolymer which have superior optical properties.Type: GrantFiled: September 18, 1978Date of Patent: October 14, 1980Assignee: CY/RO IndustriesInventor: Joseph M. Schmitt
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Patent number: 4224359Abstract: Microspheres are produced by cobalt gamma radiation initiated polymerization of a dilute aqueous vinyl pyridine solution. Addition of cross-linking agent provides higher surface area beads. Addition of monomers such as hydroxyethylmethacrylate acrylamide or methacrylamide increases hydrophilic properties and surface area of the beads. High surface area catalytic supports are formed in the presence of controlled pore glass substrate.Type: GrantFiled: October 2, 1978Date of Patent: September 23, 1980Assignee: California Institute of TechnologyInventors: Alan Rembaum, Amitava Gupta, Willi Volksen
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Patent number: 4217433Abstract: When an acrylic monomer such as methyl methacrylate is copolymerized with an allyl monomer such as allyl methacrylate whereby the resulting copolymer has active pendant allyl groups, this copolymer is then crosslinked with diethylene glycol bis (allyl carbonate) monomer (called ADC). The resulting product has considerable reduction in shrinkage while maintaining optical clarity and is useful as lenses.Type: GrantFiled: August 3, 1979Date of Patent: August 12, 1980Assignee: Pennwalt CorporationInventor: Christopher J. Dyball
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Patent number: 4208491Abstract: There is disclosed a method for crosslinking elastomers containing randomly distributed sites of conjugated olefinic unsaturation with monomers adsorbed onto granular adsorbent and dispersed into the elastomer.Type: GrantFiled: October 3, 1975Date of Patent: June 17, 1980Assignee: Exxon Research & Engineering Co.Inventor: Irwin J. Gardner
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Patent number: 4179477Abstract: A rapid curing polybutadiene resin system dielectric coating composition suitable for coating electrical components such as thin film resistors is disclosed. This composition cures very rapidly and greatly improves adhesion to the coated article.Type: GrantFiled: July 8, 1974Date of Patent: December 18, 1979Assignee: Corning Glass WorksInventor: Lawrence G. Bockstie, Jr.
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Patent number: 4169828Abstract: The production of polymer beads by a suspension polymerization process in which a vinyl aromatic monomer having a free-radical generating catalyst dissolved therein is suspended in an aqueous medium with the aid of from 0.1 to 2.0 percent by weight, based on monomer, of a finely divided phosphate suspending agent in the presence of a modifier and heated to cause the monomer to polymerize into polymer beads is improved by the addition to the suspension of at least about 0.01 percent by weight based on monomer of an adjunct modifier, such as certain aminoalkanecarboxylic acids and N-substituted derivatives thereof. The process of the invention is especially applicable in the preparation of large polymer beads.Type: GrantFiled: December 27, 1977Date of Patent: October 2, 1979Assignee: Arco Polymers, Inc.Inventor: Harold A. Wright
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Patent number: 4167465Abstract: Unsaturated hydantoin derivatives of the formula ##STR1## where R.sub.1 and R.sub.2 are alkyl, R.sub.3 is vinyl, allyl, alkylene, substituted alkylene or polyvalent aralkyl, R.sub.4 is vinyl or allyl and n is 1 to 3, are coagents for curing polymeric compositions to improve their physical, chemical and electrical properties. These coagents are particularly useful in crosslinking PVC, polyethylene, chlorinated polyethylene and poly(ethylene/vinyl acetate) compositions.Type: GrantFiled: March 13, 1978Date of Patent: September 11, 1979Assignee: Ciba-Geigy CorporationInventors: Hyman W. Zussman, Martin Knell, Martin Dexter