Mixed With Sulfur-containing Chemical Treating Agent Patents (Class 525/505)
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Patent number: 4942217Abstract: A heat-hardenable binder comprising (a) a phenolic resin of a phenolic compound and formaldehyde in a molar ratio of 1:1 to 1:2 and (b) an effective amount of a hardener mixture of hexamethylenetetramine and an acidic latent hardening agent with reduced emission problems and curing rapidly.Type: GrantFiled: October 26, 1988Date of Patent: July 17, 1990Assignee: Rutgerswerke AGInventors: Arno Gardziella, Alois Kwasniok
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Patent number: 4925901Abstract: Storage stable compositions are disclosed which comprise an epoxide containing compound, a phenolic hydroxyl containing compound, and a catalyst compound for catalyzing the reaction between epoxide groups and aromatic hydroxyl groups which catalyst comprises the product resulting from contacting an onium salt, amine, or amine salt with an acid or a salt of an acid having a weak nucleophilic anion.Type: GrantFiled: November 18, 1988Date of Patent: May 15, 1990Assignee: The Dow Chemical CompanyInventors: James L. Bertram, Louis L. Walker, John W. Muskopf
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Patent number: 4904516Abstract: A process for preparing a water soluble phenol-formaldehyde resole resin having improved storage stability employs a calcium compound to catalyze the condensation reaction which occurs under basic conditions. Sulfamic acid is used to neutralize the resole solution, yielding a soluble calcium salt which will not settle out of the solution or clog transfer lines or spray nozzles as may a calcium salt precipitated during the neutralization. Glass fiber insulation produced using a binder prepared with the aqueous resole solution shows enhanced thickness recovery and lower odor potential.Type: GrantFiled: January 12, 1988Date of Patent: February 27, 1990Inventor: Albert W. Creamer
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Patent number: 4904753Abstract: Disclosed is a catalyst system which improves the cure time of acid-catalyzable resole resins while providing extended shelf life thereof. Broadly, the present invention includes a method for formulating an acid-catalyzed, non-aqueous resole resin composition and to the composition itself. The catalyst system comprises an acid catalyst and an oxidizing agent in an amount adequate for cure in at least about the same time that occurs by use of at least twice the amount of said acid catalyst alone. The shelf life of the catalyzed resole resin is greater with the inventive catalyst system than with an equivalent resole resin containing only the acid catalyst in twice the amount.Type: GrantFiled: March 23, 1988Date of Patent: February 27, 1990Assignee: Ashland Oil, Inc.Inventors: Golden F. Watts, Warren L. Robbins
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Patent number: 4882216Abstract: A film comprising a metal foil and a flexible epoxy resin layer covered therewith, wherein the flexible epoxy resin layer is formed from a flexible epoxy resin composition containing one or more polythiol compounds as a hardener, and a flexible printed wiring board produced therefrom.Type: GrantFiled: August 9, 1988Date of Patent: November 21, 1989Assignee: Kashima Industries Co.Inventors: Hideo Takimoto, Katsuji Tokuda, Koji Yamamoto
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Patent number: 4871831Abstract: A method is presented to prepare totally functionalized ether-capped oligomeric polyphenols without molecular weight fractionation. The products generally are very low in inorganic salts and are characterized by the absence of volatiles leading to void formation in their subsequent curing. The success of the method rests upon conducting the reaction under totally homogeneous conditions throughout.Type: GrantFiled: November 30, 1987Date of Patent: October 3, 1989Assignee: Allied-Signal Inc.Inventors: Andrew M. Zweig, Jeffrey P. Conrad
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Patent number: 4855339Abstract: An epoxy resin composition comprising (A) an epoxy resin having three or more epoxy groups per a molecule and (B) a reactive oligomer having in its molecule an aromatic residue connected thereto by --O-- or --S-- linkage and having at the terminal of the molecule a phonolic hydroxyl group.Type: GrantFiled: January 19, 1989Date of Patent: August 8, 1989Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhisa Saito, Hisao Takagishi, Hiroshi Nakamura, Kohichi Okuno, Yutaka Shiomi, Kunimasa Kamio
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Patent number: 4851485Abstract: Non-fluorinated epoxy resins of a known type are cross-linked by means of polyfunctional fluoroalkanes containing groups which are reactive with the epoxy groups and/or with the hydroxy groups present in the starting resin. The cross-linked products so obtained, having a fluorine content not higher than 15% by weight, and preferably ranging from 1% to 5%, exhibit a complex of properties which are typical of the corresponding fluorinated resins having a much higher fluorine content; in particular, oil- and water-repellency, resistance to hydrolysis and to solvents, and minimum absorption of water.Type: GrantFiled: June 1, 1988Date of Patent: July 25, 1989Assignee: Ausimont S.p.A.Inventors: Alberto Re, Claudio Tonelli, Vito Tortelli
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Patent number: 4839253Abstract: An electrodepositable photosensitive resin which is a phenolic novolak resin having(i) at least part of the phenolic hydroxyl groups thereof replaced by a quinone diazide sulphonyloxy group, and(ii) at least part of the aromatic rings thereof substituted in a position ortho and/or para to a phenolic hydroxyl group or quinone diazide sulphonyloxy group by a group of formula --CH(R.sup.1)R.sup.2 whereR.sup.1 represents a hydrogen atom, or an alkyl, aryl or carboxylic acid group, andR.sup.2 represents a sulphonic acid group --SO.sub.3 H or a group of formula --A--R.sup.3 --X,R.sup.3 represents an aliphatic, aromatic or araliphatic divalent group which may be substituted by a carboxlic, sulphonic or phosphonic acid group,A represents a sulphur atom or a group of formula --N(R.sup.4)--, where R.sup.4 represents a hydrogen atom or an alkyl group which may be substituted by a carboxylic acid group or by an optionally etherified hydroxyl group, or R.sup.3 and R.sup.Type: GrantFiled: August 28, 1987Date of Patent: June 13, 1989Assignee: Ciba-Geigy CorporationInventors: Christopher G. Demmer, Edward Irving
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Patent number: 4816545Abstract: Non-fluorinated epoxy resins of known type are crosslinked by means of polyfunctional perfluoropolyethers containing groups which are reactive with the epoxy groups and/or with the hydroxy groups present in the starting resin. The so-obtained crosslinked products, with a fluorine content not higher than 20% by weight, preferably comprised within the range of from 5% to 15%, are endowed with a set of properties typical of the corresponding fluorinated resins with a much higher fluorine content, in particular, water- and oil-repellence, resistance to hydrolysis and to solvents, minimum water absorption.Type: GrantFiled: May 8, 1987Date of Patent: March 28, 1989Assignee: Ausimont S.p.A.Inventors: Alberto Re, Gianni Donati
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Patent number: 4812538Abstract: Compounds of formula I or II ##STR1## wherein R.sup.1 and R.sup.2 are hydrogen, alkyl, cyclohexyl, phenyl, benzyl or tolyl, or are a --CH.sub.2 --CHR.sup.3 --CH.sub.2 --S--CO--R.sup.4 radical, R.sup.3 is hydrogen or methyl, R.sup.4 is alkyl, cyclohexyl, phenyl, benzyl or tolyl, X is alkylene, --S--, --SO--, --SO.sub.2 -- or substituted alkylene, in which R.sup.5 and R.sup.6 are hydrogen or alkyl, and n is an integer from 1 to 10, can be used as latent hardeners for epoxy resins.The compositions containing epoxy resins and these hardeners are particularly suitable for use as single component adhesive formulations. The cured products have good hot water resistance.Type: GrantFiled: June 29, 1987Date of Patent: March 14, 1989Assignee: Ciba-Geigy CorporationInventors: Hans Lehmann, Abdul-Cader Zahir
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Patent number: 4783363Abstract: An improvement in curable compositions which comprise a polyglycidyl ether such as the triglycidylether of tris(hydroxyphenyl)methane and a halogenated dihydric phenol such as tetrabromobisphenol A, the improvement being employing as the halogenated dihydric phenol one in which the halogen atoms are meta with respect to the hydroxyl groups such as 2,2',6,6'-tetrabromo-3 ,3',5,5'-tetramethyl-4,4'-biphenol. These compositions can be cured by heating in the presence or absence of a catalyst for reacting epoxy groups with phenolic hydroxyl groups such as 2-methyl imidazole. These compositions are particularly useful in the preparation of electrical laminates.Type: GrantFiled: March 11, 1987Date of Patent: November 8, 1988Assignee: The Dow Chemical CompanyInventors: Jody R. Berman, Abel Mendoza
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Patent number: 4681923Abstract: An electrodepositable photosensitive modified phenolic novolak resin of general formula ##STR1## where Ar.sup.1 represents a divalent aromatic group linked through aromatic carbon atoms to the indicated groups --OR.sup.2 and --CH(R.sup.1)--,Ar.sup.2 represents a trivalent aromatic group linked through aromatic carbon atoms to the indicated groups --OR.sup.2 and --CH(R.sup.1)--,R.sup.1 represents a hydrogen atom or an alkyl, aryl or carboxyl group,R.sup.2 represents a hydrogen atom, an alkyl group which may be substituted by a hydroxyl or alkoxy group, or a group of formula --CO--R.sup.3 --COOH, --SO.sub.2 R.sup.4, --COR.sup.5 or --SO.sub.2 R.sup.5, at least 1% of the groups R.sup.2 representing a group --CO--R.sup.3 --COOH and at least 4% of the groups R.sup.2 representing a group --SO.sub.2 R.sup.4,R.sup.3 denotes a divalent aliphatic, cycloaliphatic, aromatic or araliphatic group,R.sup.4 denotes a 1,2-benzoquinone diazide group or 1,2-naphthoquinone diazide groupR.sup.Type: GrantFiled: February 21, 1986Date of Patent: July 21, 1987Assignee: Ciba-Geigy CorporationInventors: Christopher G. Demmer, Edward Irving
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Patent number: 4670511Abstract: Method for manufacturing a conductive plastic of a defined conductivity by forming a polymer alloy. A polar or nonpolar insulating polymer and a polar or nonpolar conductive polymer are used for forming the polymer alloy. The two polymers are mixed together and they are homogeneously distributed within the polymer alloy.Type: GrantFiled: February 26, 1986Date of Patent: June 2, 1987Assignee: Brown, Boveri & CIE AGInventors: Gert Weddigen, Josef Flatz, Conrad Schmidt, Robert Huber, Gerhard Pohsner
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Patent number: 4663401Abstract: A thermosettable epoxy resin composition comprising 100 parts by weight of an epoxy resin, 5 to 40 parts by weight of polysulfone resin having both a resorcinol moiety and 4,4'-dichlorodiphenylsulfone moiety in the molecular chain, and an effective amount of a curing agent, which gives a cured product excellent in toughness as well as in curability, adhesion, mechanical strength at high temperatures and resistance to chemicals.Type: GrantFiled: May 2, 1985Date of Patent: May 5, 1987Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhisa Saito, Akira Morii, Hiroshi Nakamura
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Patent number: 4639496Abstract: Method for the manufacture of a polymer with triaromatic methane units as basic building blocks, the electric conductivity of which is obtained through the formation of charge transfer complexes. Electron donors and/or electron acceptors are added to the synthetic polymer during or after its preparation, for forming charge transfer complexes.Type: GrantFiled: August 29, 1985Date of Patent: January 27, 1987Assignee: Brown, Boveri & Cie AGInventors: Gerd Weddigen, Robert Huber, Birgit Schmidt, Hartmut Schneider
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Patent number: 4604317Abstract: Curable compositions are disclosed which comprise a polyglycidyl ether such as the triglycidylether of tris(hydroxyphenyl)methane and a halogenated dihydric phenol such as tetrabromobisphenol A. These compositions can be cured by heating in the presence or absence of catalyst for reacting epoxy groups with phenolic hydroxyl groups such as 2-methyl imidazole. These compositions are particularly useful in the preparation of electrical laminates.Type: GrantFiled: May 24, 1985Date of Patent: August 5, 1986Assignee: The Dow Chemical CompanyInventors: Jody R. Berman, Christine C. Berkefelt, Dale J. Aldrich
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Patent number: 4596854Abstract: An adhesive for adhering fibrous materials, particularly polyester fibrous material to rubber is disclosed, which comprises polyhydric phenol-polysulfides, resorcin excess resorcin-formaldehyde condensates, and RFL solution composed of resorcin-formaldehyde condensate and rubber latex.Type: GrantFiled: October 1, 1984Date of Patent: June 24, 1986Assignee: Bridgestone Corp.Inventors: Toshihiro Yotsumoto, Tsuneharu Akiyama
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Patent number: 4587291Abstract: Binders are described based on acid curing phenol resins and acid curing agents which, after mixing, have an extended processability time but nevertheless exhibit a rapid curing time at relatively low temperatures. They are obtained by using, as the resin, aqueous phenol resols and, as the curing agent, either copper, aluminum, or iron(III) salts of aromatic sulfonic acids or addition products of hydroxy-containing, water-compatible polyols with aromatic sulfonic acids or mixtures of these salts and the polyol addition products. The binders are used for impregnation of fabrics, for production of abrasives and for fiber reinforced plastics.Type: GrantFiled: April 25, 1985Date of Patent: May 6, 1986Assignee: Rutgerswerke AktiengesellschaftInventors: Arno Gardziella, Karl-Heinz Schwieger, Peter Adolphs, Gerhard Grossmann
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Patent number: 4564466Abstract: Method for the manufacture of a polymer with triaromatic methane units as basic building blocks, the electric conductivity of which is obtained through the formation of charge transfer complexes. Electron donors and/or electron acceptors are added to the synthetic polymer during or after its preparation, for forming charge transfer complexes.Type: GrantFiled: December 21, 1983Date of Patent: January 14, 1986Assignee: Brown, Boveri & Cie AGInventors: Gerd Weddigen, Robert Huber, Birgit Schmidt, Hartmut Schneider
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Patent number: 4555450Abstract: A transparent moisture-resistant mercaptan composition is made utilizing an amino-titanate catalyst. The composition can be utilized in association with high heat-resistant transparent compositions containing a boroxine compound.Type: GrantFiled: May 1, 1984Date of Patent: November 26, 1985Assignee: Goodyear Aerospace CorporationInventor: John R. Uram, Jr.
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Patent number: 4555544Abstract: In a process for hardening phenol-formaldehyde resol resins, comprising conducting the hardening of the resins with an acidic solution of water and/or an organic solvent having dissolved therein an aromatic sulphonic acid and/or concentrated sulphuric acid, the improvement comprising the hardening in the presence of aniline added to the phenolic resin beforehand in a quantity of between about 0.5 and 2% relative to the weight of the phenolic resin whereby the pot life is extended and the cure time is satisfactory, the resultant products being especially useful as prepegs.Type: GrantFiled: December 28, 1984Date of Patent: November 26, 1985Assignee: Societe Chimique des Charbonnages CDF Chimie, S.A.Inventors: Nicolas Meyer, Michel Cousin
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Patent number: 4551508Abstract: Polyglycidyl ethers of the formula ##STR1## wherein: G represents hydrogen, ##STR2## R.sup.1 represents a hydrogen atom, an aliphatic, alicyclic, or aromatic hydrocarbon group, or a 5- or 6-membered oxygen or sulfur atom containing heterocyclic group which groups, other than hydrogen, may be substituted by halogen or the group --OG,R.sup.2 is hydrogen or ##STR3## n is a positive number up to 10, and at least two G groups in the molecule are other than hydrogen. The polyglycidyl ether is produced by condensing alpha-naphthol with an aldehyde, such as acetaldehyde, in the presence of an acid catalyst such as nitric acid, and optionally in the presence of an inert medium such as toluene, to form a novolak-type phenol which is thereafter condensed with an epihalohydrin. The polyglycidyl ethers may be cured with conventional curing agents. Composite materials containing a matrix formed from the cured polyglycidyl ether and a filler dispersed in the matrix have excellent heat resistance and low water absorption.Type: GrantFiled: May 23, 1984Date of Patent: November 5, 1985Assignee: Agency of Industrial Science and TechnologyInventor: Takanori Urasaki
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Patent number: 4482679Abstract: Compositions that cure when heated comprise(A) an epoxide resin and(B) an effective amount of(i) a diaryliodosyl salt of formula ##STR1## where R.sup.1 and R.sup.2, which may be the same or different, each represents a monovalent aromatic radical of from 4 to 25 carbon atoms, such as a substituted or unsubstituted phenyl group,M represents a metal or metalloid atom, such as phosphorus or boron,X represents a halogen atom, particularly chlorine or fluorine, andn is 4, 5, or 6, and is greater by one than the valency of M or MX.sub.n.sup.- represents pentafluorohydroxoantimonate, and(ii) a catalyst for the diaryliodosyl salt which is a salt or complex of a d-block transition metal, a stannous salt, an organic peroxide, or an .alpha.-hydroxy compound.Typically, the epoxide resin (A) is a bisphenol A diglycidyl ether, the salt (i) is diphenyliodosyl tetrafluoroborate or hexafluorophosphate, and the catalyst (ii) is cupric acetylacetonate or benzpinacol.Type: GrantFiled: September 9, 1983Date of Patent: November 13, 1984Assignee: Ciba-Geigy CorporationInventor: Edward Irving
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Patent number: 4451623Abstract: Certain water-soluble substituted phenol formaldehyde type copolymers retain their viscosities in high brine environments and are highly useful as surfactant-mobility control agents in oil recovery processes.Type: GrantFiled: September 22, 1982Date of Patent: May 29, 1984Assignee: Mobil Oil CorporationInventor: Catherine S. H. Chen
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Patent number: 4439594Abstract: Curable compositions of matter comprising an epoxy resin and a curing agent selected from the group consisting of polyvalent metal salts of a phosphorodithioic acid, the acid being derived from the reaction of a phosphorus sulfide with a hydroxyl containing aromatic compound, and products derived from the reaction of the polyvalent metal salt with a mono- or polyamine.Type: GrantFiled: September 17, 1982Date of Patent: March 27, 1984Assignee: The Lubrizol CorporationInventors: William A. Higgins, Alan C. Clark
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Patent number: 4412045Abstract: A color developer for pressure-sensitive copying papers is prepared by mixing a para-substituted difunctional phenol-aldehyde condensate and tri- or higher-functional phenol-aldehyde condensate. The tri- or higher-functional phenol-aldehyde condensate can be modified by a polyvalent metal.Type: GrantFiled: January 25, 1982Date of Patent: October 25, 1983Assignee: Sumitomo Durez Company, Ltd.Inventors: Toyoji Kikuga, Koji Hirai
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Patent number: 4409374Abstract: A color developer for pressure-sensitive copying paper is prepared by mixing a polyvalent metal salt of a para-substituted difunctional phenol-aldehyde condensate and a tri- or higher-functional phenol-aldehyde condensate and/or a polyvalent metal modified tri- or higher-functional phenol-aldehyde condensate.Type: GrantFiled: January 25, 1982Date of Patent: October 11, 1983Assignee: Sumitomo Durez Company, Ltd.Inventors: Toyoji Kikuga, Koji Hirai
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Patent number: 4409375Abstract: A method is described for reducing the amount of aldehyde liberated from aldehyde-containing resins during the production and subsequent use of products prepared with the resin by admixing bisulfite salt scavengers therewith. A method is also described for reducing airborne aldehydes from the environment by placing aqueous solutions of bisulfite salts in the aldehyde-containing environment.Type: GrantFiled: February 11, 1982Date of Patent: October 11, 1983Assignee: Champion International CorporationInventors: Seymour Hartman, Timothy M. Brown
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Patent number: 4404355Abstract: The invention relates to heat curable epoxy resin compositions consisting of an epoxy resin containing, on average, more than one epoxide group per molecule, an aromatic onium salt as catalyst, a copper complex compound as co-catalyst, and a light stabilizer. These compositions are less sensitive to UV irradiation and have a good shelf life at room temperature as well as a good high temperature reactivity.Type: GrantFiled: September 28, 1981Date of Patent: September 13, 1983Assignee: Ciba-Geigy CorporationInventors: Sameer H. Eldin, Bruno Schreiber
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Patent number: 4403079Abstract: Condensation products, which can be obtained by a reaction of naphthols and alkanals, addition of alkylene oxides and more or less complete conversion of terminal hydroxy groups into sulfo groups or half-esters of maleic acid, phthalic acid or sulfosuccinic acid, are suitable for use as surface-active agents, in particular as coupling auxiliaries in the preparation of azo pigments and also as dispersing agents in the preparation of colorant dispersions and as wetting, emulsifying, leveling or dyeing auxiliaries.Type: GrantFiled: February 10, 1982Date of Patent: September 6, 1983Assignee: Hoechst AktiengesellschaftInventors: Heinz Uhrig, Klaus Ehl
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Patent number: 4403077Abstract: The invention relates to novolak oxyalkylate mixed esters which, on the one hand, contain benzoyl and/or naphthoyl radicals and, on the other hand, contain maleic acid and/or sulfosuccinic acid half-ester groups. They are obtained by reacting novolak oxyalkylates with benzoic acid and/or naphthoic acid or with its anhydride or chloride on the one hand and maleic anhydride on the other hand and, if appropriate, reacting the maleic acid half-ester groups with sulfites to give sulfosuccinic acid half-ester groups. These compounds are highly suitable for use as dispersing agents for the preparation of low-foam dispersions of pigments, dyestuffs and other agents and as emulsifying, leveling and dyeing auxiliaries.Type: GrantFiled: May 21, 1982Date of Patent: September 6, 1983Assignee: Hoechst AktiengesellschaftInventors: Heinz Uhrig, Joachim Weide, Reinhold Deubel
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Patent number: 4395520Abstract: Latent catalysts comprising certain sulfur dioxide containing compounds such as bubadiene sulfone are used in the cure of thermosetting resins which are curable by an acid catalyst.Type: GrantFiled: January 20, 1982Date of Patent: July 26, 1983Assignee: Union Carbide CorporationInventors: Sui-Wu Chow, George L. Brode
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Patent number: 4374740Abstract: Certain water-soluble substituted phenol formaldehyde type copolymers retain their viscosities in high brine environments and are highly useful as surfactant-mobility control agents in oil recovery processes.Type: GrantFiled: January 16, 1981Date of Patent: February 22, 1983Assignee: Mobil Oil CorporationInventor: Catherine S. H. Chen
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Patent number: 4323667Abstract: Concentrated boric anhydride solutions containing more than 5% of boric anhydride in an organic solvent selected from mono or polyalcohols, trialkylborate and/or dialkylacetal when the solvent also contains an acid selected from sulfuric acid and/or aromatic acids. These solutions are used as hardeners of formo-phenolic resols, more particularly for the manufacture of laminates comprising glass fibers and formo-phenolic resols.Type: GrantFiled: January 22, 1981Date of Patent: April 6, 1982Assignee: Societe Chimique des Charbonnages SAInventors: Nicolas Meyer, Raymond Foulon
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Patent number: 4322300Abstract: A water-base well drilling, workover or completion fluid containing a fluid loss control agent prepared by pre-reacting sulfonated phenol with formaldehyde under alkaline conditions and then reacting the mixture with phenol under controlled conditions is described.Type: GrantFiled: May 27, 1980Date of Patent: March 30, 1982Assignee: Georgia-Pacific CorporationInventor: Howard W. Holmquist
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Patent number: 4299938Abstract: Substances (I) capable of being converted into higher-molecular weight materials under the influence of a cationic catalyst, such as 1,2-epoxides, aminoplasts, vinyl monomers or prepolymers, or phenoplasts, are so converted by exposure to actinic irradiation or by heating in the presence of an aryloxysulfoxonium salt of formula ##STR1## where either R.sup.6 and R.sup.7 separately denote lower alkyl (optionally substituted by halogen and interrupted in the chain by --O-- or --SO.sub.2 --), or an aryl or aryloxy group, or R.sup.6 and R.sup.7 together denote a divalent group forming with the S atom a heterocyclic radical; R.sup.8 denotes an aryl group; M denotes an atom of a metal or metalloid; X denotes a halogen atom; and n is 4, 5, or 6, for instance,p-chlorophenoxy-p-tolyl-p-phenoxysulfoxonium hexafluorophosphate and 1-phenoxy-1-oxidotetrahydrothiophenium tetrafluorborate.Type: GrantFiled: June 9, 1980Date of Patent: November 10, 1981Assignee: Ciba-Geigy CorporationInventors: George E. Green, Edward Irving
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Patent number: 4284433Abstract: Water-hardening binding agent such as concrete, mortar, cement and the like are modified with a solid additive in the form of aggregates consisting of fine particle having a grain size of from 0.1 to 10 mm, preferably in pelletized or pressed grain form. These additives have an adjustable rate of dissolution and permit controlling the speed and manner of hardening of said water-hardening binding agent.Type: GrantFiled: April 13, 1979Date of Patent: August 18, 1981Assignee: SKW Trostberg AktiengesellschaftInventors: Alois Aignesberger, Jean-Pierre Deppen, Hans-Gunter Rosenbauer
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Patent number: 4284512Abstract: Ferric ions may be removed very selectively from aqueous solutions by means of a metal-chelating resin consisting of the acid-quaternized form of a cross-linked polymer produced by the condensation of a phenolic component comprising one or more phenols, formaldehyde, and a diamino component comprising one or more di-(secondary amino) compounds under neutral conditions. The resin is prepared by treating the cross-linked polymer with an aqueous solution of a strong mineral acid.Type: GrantFiled: December 3, 1979Date of Patent: August 18, 1981Assignee: Commonwealth Scientific and Industrial Research OrganizationInventor: Jonathan H. Hodgkin
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Patent number: 4281044Abstract: The bonding of phenolic resins and phenolic molding materials to copper is significantly improved by the addition to the phenolic material of elemental sulfur in a weight percentage from 0.005% to 1%, the weight percentage of sulfur being preferably from 0.01% to 0.2%.Type: GrantFiled: June 29, 1979Date of Patent: July 28, 1981Assignee: Rogers CorporationInventors: Linwood A. Walters, J. Mark Mersereau
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Patent number: 4266045Abstract: An etherified phenolic chelate resin prepared by stabilizing and protecting the chelate groups of a phenolic chelate resin and then converting some or all of the phenolic hydroxyl groups into ether groups; a process for the production of the etherified phenolic chelate resin; and a method for separating a heavy metal ion from an aqueous solution having a pH of at least 7 by using this etherified phenolic chelate resin.Type: GrantFiled: September 11, 1978Date of Patent: May 5, 1981Assignee: Unitika Ltd.Inventors: Hiroyuki Uejima, Masahide Hirai, Tsutomu Sakaida
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Patent number: 4264760Abstract: Conventional aldehyde containing resins for making bonded products or insulation foam are deodorized by the addition thereto of a sulfur compound such as oxyacid salts of sulfur in a valence state ranging from +5 to -2 inclusive.Type: GrantFiled: September 13, 1979Date of Patent: April 28, 1981Inventor: Carl B. Meyer
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Patent number: 4259464Abstract: Cyclic phenol-aldehyde resins, for example cyclic tetramers; derivatives thereof; processes by which they are prepared; and uses thereof.Type: GrantFiled: May 13, 1976Date of Patent: March 31, 1981Assignee: Petrolite CorporationInventors: Rudolf S. Buriks, Allen R. Fauke, John H. Munch
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Patent number: 4220739Abstract: Organic materials such as polyethylene, polystyrene and polypropylene are more efficiently sulfonated by contacting them with an essentially dry gaseous mixture of sulfur trioxide and chlorine. Sulfonated organic polymers prepared by this process are adhesive, antistatic and highly impermeable to oleophilic materials such as gasoline, and common hydrocarbon solvents.Type: GrantFiled: July 28, 1978Date of Patent: September 2, 1980Assignee: The Dow Chemical CompanyInventor: Wilhelm E. Walles
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Patent number: 4216299Abstract: A color developer for pressure-sensitive copying paper is prepared by mixing a polyvalent metal salt of a para-substituted difunctional phenol-aldehyde condensate and a tri- or higher-functional phenol-aldehyde condensate and/or a polyvalent metal modified tri- or higher-functional phenol-aldehyde condensate.Type: GrantFiled: November 1, 1977Date of Patent: August 5, 1980Assignee: Sumitomo Durez Company, Ltd.Inventors: Toyoji Kikuga, Koji Hirai
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Patent number: 4216300Abstract: A color developer for pressure-sensitive copying papers is prepared by mixing a para-substituted difunctional phenol-aldehyde condensate and tri- or higher-functional phenol-aldehyde condensate. The tri- or higher-functional phenol-aldehyde condensate can be modified by a polyvalent metal.Type: GrantFiled: November 1, 1977Date of Patent: August 5, 1980Assignee: Sumitomo Durez Company, Ltd.Inventors: Toyoji Kikuga, Koji Hirai
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Patent number: 4207408Abstract: Infusible cured phenolic resin fibers of the present invention have a birefringence of at least 2.times.10.sup.-3 with the x-ray diffraction pattern of the fibers showing an amorphous halo. The tenacity of infusible cured phenolic resin fibers is significantly increased by subjecting the fibers to sufficient longitudinal tension as to cause at least about 30% elongation of the fibers. The Young's modulus of elasticity of the fibers is also significantly increased thereby. Preferably the resulting stretched infusible cured phenolic resin fibers have a tenacity of at least about 4 g./den.Type: GrantFiled: May 22, 1978Date of Patent: June 10, 1980Assignee: The Carborundum CompanyInventors: James Economy, Francis J. Frechette, Luis C. Wohrer
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Patent number: 4202959Abstract: The present invention provides fibres of urea formaldehyde, melamine formaldehyde, phenol formaldehyde, and mixtures thereof, modified by inorganic oxyacid radicals derived from inorganic oxyacids of sulphur, salts of such inorganic oxyacids, phosphate radicals, phosphite radicals, borate radicals and mixtures thereof.Type: GrantFiled: December 5, 1977Date of Patent: May 13, 1980Assignee: Imperial Chemical Industries LimitedInventors: Richard G. C. Henbest, Kenneth McGregor
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Patent number: 4200706Abstract: Phenol-formaldehyde resoles and novalacs are cured at temperatures of from about 0.degree. C. to about 150.degree. C. and at pressures ranging from about atmospheric pressure to about 5 atmospheres to produce highly cross-linked resins when divinylbenzene is used as a cross-linking agent together with a minor amount of an acidic catalyst.Type: GrantFiled: May 30, 1978Date of Patent: April 29, 1980Assignee: Conoco, Inc.Inventor: Charles M. Starks