Abstract: Compositions comprising from 5 to 50% by weight of a polyphenylene ether and from 95 to 50% by weight of a styrene polymer having a syndiotactic structure. Such compositions are endowed with enhanced mechanical properties compared to those containing amorphous polystyrene, or polystyrene having an isotactic structure.

Abstract: Lubricant systems are provided in which a polyolefin or polyolefin/polytetrafluoroethylene blend functions as a lubricant in a polymer matrix material. The resulting polymer composites containing about 1 to 30 weight percent of the novel lubricant or lubricant blend have greatly improved friction and wear properties, including lower coefficients of friction and increased surface wear resistence. The polyolefin does not remain as discrete, identifiable particles after mixing with the polymer matrix, and has an average molecular weight of less than 500,000.

Abstract: A moldable polymer composition comprising an acetophenone based bisphenol polyarylate resin and a monovinyl aromatic/N-arylmaleimide copolymer is disclosed. In one embodiment, the N-arylmaleimide containing copolymer is rubber modified by the incorporation of an elastomeric polymer during the formation of the copolymer. In another embodiment, the moldable polymer composition is rubber modified by the incorporation of an elastomeric polymer using any conventional method of blending.

Abstract: Solvent-resistant resin blends with a wide variety of desirable tensile properties are prepared from a polyphenylene ether having a low proportion of unneutralized amino nitrogen or a blend thereof with a polystyrene; an elastomeric polyester or blend thereof with a poly(ethylene terephthalate) or poly(butylene terephthalate); at least one polyphenylene ether-compatible impact modifier; and a relatively large proportion of at least one polymer containing a substantial proportion of aromatic polycarbonate units as a compatilizing agent.

Abstract: A fluoroelastomer composition that has enhanced adhesion to metal when cured which comprises:(a) an elastomeric copolymer of vinylidene fluoride and at least one other fluorinated monomer,(b) a vulcanization accelerator that is a quaternary phosphonium compound,(c) a crosslinking agent selected from the group consisting of a bisphenol or a polyhydroxy phenol of the formula: ##STR1## where R is H or an alkyl group or an aryl group and R' is an alkyl group or an aryl group, and(d) 0.02-0.8 weight percent based on the weight of the elastomeric copolymer of a metal adhesion promoter that is a tetraalkylammonium halide where each alkyl group contains 1-10 carbon atoms and the halide is a chloride, bromide or iodide. When cured in contact with metal the fluoroelastomer composition forms a strong bond with the metal surface.

Abstract: A blend of tetrafluoroethylene and a poly(oxy-p-phenyleneisophthaloyl-phenylene/oxy-p-phenyleneterephthaloyl- p-phenylene) (PEKK) results in improved processing of the fluoroelastomer at temperatures below the melting temperature of the PEKK and improves physical properties of cured fluoroelastomer.

Abstract: In the instant invention, improved blow moldable polyarylate compositions which yield molded objects having substantially uniform wall thickness throughout are provided by the addition of a small amount of a fibrillatable fluoropolymer resin.

Abstract: Polyphenylene ether/rubber modified polystyrene compositions are uniquely suitable for flow molding large, e.g., 10 pounds or more, parts when the rubber modified polystyrene contains at least 12 percent by weight of particulate rubber, the rubber particles have an average diameter of greater than about 3 microns, and the compositions have an R* value of greater than about 16. R* is the ratio of the low shear rate viscosity to the high shear rate viscosity at the optimum processing temperature.

Abstract: A coating composition comprising a major amount of resin and a minor amount of a property-improving additive,said resin being:(A) a fluorocarbon resin selected from the group consisting of (1) perfluoroalkoxy tetrafluoroethylene copolymer resin (PFA), (2) ethylenechlorotrifluoroethylene copolymer resin (E-CTFE), (3) ethylenetetrafluoroethylene copolymer resin (E-TFE), (4) poly(vinylidine fluoride) resin (PVDF), (5) tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP), (6) poly(chlorotrifluoroethylene) resin (CTFE), or a mixture of two or more of said fluorocarbon resins; or(B) a polyether resin selected from the group consisting of (7) polyethersulfone resin (PES), (8) polyether ketone resin (PEK) and (9) polyether ether ketone resin (PEEK) or a mixture of two or more of said polyether resins;said additive being:(C) a poly(phenylene sulfide) (PPS); or(D) an inorganic crystalline ceramic powder and/or fluorocarbon resin when said resin is a polyether of (B) above; or(E) an inorganic material selected

Abstract: A fluoroelastomer composition that has enhanced adhesion to metal when cured which comprises:(a) an elastomeric copolymer of vinylidene fluoride and at least one other fluorinated monomer,(b) a vulcanization accelerator that is a quaternary phosphonium compound,(c) a crosslinking agent selected from the group consisting of a bisphenol or a polyhydroxy phenol of the formula: ##STR1## where R is H or an alkyl group or an aryl group and R' is an alkyl group or an aryl group, and(d) 0.02-0.8 weight percent based on the weight of the elastomeric copolymer of a metal adhesion promoter that is a tetraalkylammonium halide where each alkyl group contains 1-10 carbon atoms and the halide is a chloride, bromide or iodide. When cured in contact with metal the fluoroelastomer composition forms a strong bond with the metal surface.

Abstract: A method for rendering a flammable polymer material flame-resistant, which comprises incorporating to the flammable polymer material a powder of a cross-linked aromatic polymer brominated to contain from 30 to 70% by weight of bromine.

Abstract: This invention relates to a thermoplastic formulation having a first part comprising, (i) a blend of a polyphenylene ether and a polyvinyl aromatic and (ii) a nuclear halogenated polyvinyl aromatic flame retardant, and a second part, in admixture with the first part, comprising a Diels-Alder adduct having the formulaA--R--(A).sub.nwherein n is 0, 1 or 2 and A is a polyhalogenated cycloalkylene or cycloalkyl group and R is as defined herein.

Abstract: This invention relates to a new and improved resin composition containing polyphenylene ether and, more particularly, to a molding resin composition including polyphenylene ether and cyclopentadiene resin containing a polar group.The new and improved resin composition has good melting flowability and retains good mechanical and thermal characteristics inherent to polyphenylene ether and can be suitably used as a molding material.

Abstract: Disclosed are thermoplastic compositions of improved mold flow comprising a polyphenylene ether resin and novel rubber modified polystyrenes containing dispersed rubbery particles having a maximum mean diameter of about 2.0 microns and a ratio of the volume average particle size/number average particle size of from not substantially less than 2.00 up to 3.20. Articles molded from the composition have vastly improved surface gloss and ductile impact strength in comparison with conventional polyphenylene/high impact rubber modified polystyrene compositions.

Abstract: This invention relates to a thermoplastic formulation having a first part comprising, (i) nylon 6,6 nylon 6 or a mixture thereof and (ii) a halogenated polyphenylene ether flame retardant, and a second part, in admixture with the first part, comprising a Diels-Alder adduct having the formulaA--R--(A).sub.nwherein n is 0, 1 or 2 and A is a polyhalogenated cycloalkylene or cycloalkyl group and R is as defined herein.

Abstract: The invention relates to novel compositions comprising an admixture of (a) a semi-crystalline, thermoplastic poly(arylene ether ketone) having a crystalline melting point above about 320.degree. C. and (b) a substantially non-crystalline fluorocarbon polymer capable of withstanding temperature above about 320.degree. C. for at least about 5 minutes without substantial degradation, said fluorocarbon polymer comprising a copolymer of tetrafluoroethylene wherein the tetrafluoroethylene content of the copolymer is about 5 to about 85% by weight based on the weight of the copolymer, said composition being capable of being melt processed at a temperature above the crystalline melting point of the poly(arylene ether ketone). The compositions exhibit high temperature processability, resistance to solvents, and improved dielectric properties. The compositions can be further used as substrate coatings or formed into articles.

Abstract: Thermoplastic polyarylate compositions having improved flame retardancy consisting essentially of polyacrylate, epoxy-containing polymer, brominated polystyrene and sodium antimonate.

Abstract: There is disclosed a process for the racemization of amino acids and derivatives thereof. The racemization process of the present invention uses an aromatic aldehyde-containing polymer made from the reaction of a hydroxyaromatic aldehyde with a chloromethylated vinylbenzene polymer under reaction conditions to form an aromatic aldehyde-containing polymer wherein the aldehydic moiety is linked to the polymer through an ether linkage. There is also disclosed a process for the production of the racemization catalyst. Another embodiment of the invention comprises a process for the promotion of the racemization reaction wherein a tertiary amine-containing resin is used as a promoting agent.

Abstract: A curable composition comprising an elastomeric vinylidene fluoride copolymer, a polyhydroxy compound and a vulcanization accelerator, characterized in that said copolymer contains from 2 to 50 mol % of vinylidene fluoride units and unsaturated bonds introduced by reacting an untreated elastomeric vinylidene fluoride copolymer dispersed in an aqueous medium, with an aqueous alkaline solution containing an onium compound.

Abstract: Fluoropolymer alloys made of melt fabricatable extra-high-molecular weight fluorinated ethylene-propylene copolymer (EHMW-FEP) and one or more other polymers. In fluoropolymer alloys made of EHMW-FEP and polytetrafluoroethylene, the weight percentage of the former is 0.1-99.9% and the latter is 99.9-0.1% respectively. The processes for preparing the fluoropolymer alloys are dried powder co-mill or wetted powder co-mill. Using the fluoropolymer alloys of this invention various kinds of articles have been fabricated by melt compression or cold compaction and sintering. These articles show a great improvement in creep property and also a prolonged service life in comparison with those made from ordinary polytetrafluoroethylene.

Abstract: A curable fluoroelastomer composition comprising:(a) a fluoroelastomeric copolymer of vinylidene fluoride and at least one other fluorinated monomer;(b) a curing accelerator comprising an iminum compound of the formula ##STR1## wherein R.sub.1 is a substituted or unsubstituted aryl group, R.sub.2 is an alkyl or halogenated alkyl group, a cycloalkyl or halogenated cycloalkyl group, or a substituted or unsubstituted aralkyl group, and X is a halogen atom;(c) a polyhydroxy compound as a cross-linking agent; and(d) a metal compound selected from a divalent metal hydroxide, a divalent metal oxide or a mixture thereof.

Abstract: A curable resin composition which comprises a synthetic resin and a polymerizable compound as the essential constituents, characterized in that said synthetic resin is a fluorine-containing polymer which has 10% by weight or more of fluorine atoms and is soluble in said polymerizable compound or a mixture of said polymerizable compound and a volatile solvent to be added to said compound depending on necessity, and that said polymerizable compound contains therein unsaturated bonds or epoxy group.

Abstract: A thermoplastic resin composition containing polyphenylene oxide resin is provided, which is superior in processability and impact resistance as well as heat resistance, chemical resistance and hardness, said thermoplastic resin composition comprising(A) polyphenylene oxide resin or a resin composition containing the same, and(B) ethylene copolymer comprising 50-90% by weight of ethylene, 5-49% by weight of alkyl ester of .alpha.,.beta.-unsaturated carboxylic acid and 0.5-10% by weight of maleic anhydride.

Abstract: A molding composition containing a compatible blend of (i) a polycarbonate having repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS), optionally a dihydric phenol such as 2,2-bis(4-hydroxyphenyl)propane (Bisphenol A) and a carbonate precursor, and (ii) a vinyl chloride derived polymer.

Abstract: A method for increasing the heat distortion temperature of certain blends of polyphenylene ether resin and styrene polymers is described in which an admixture is formed of a polyphenylene ether resin and a flame retardant copolymer of styrene and up to 50 percent dibromostyrene. The resulting compositions can be formulated to include one or more additional ingredients and are moldable into articles characterized by good flame retardancy and light stability, as well as a higher heat distortion temperature compared with articles formed from corresponding blends using homopolystyrene or styrene-bromostyrene copolymer.

Abstract: Crosslinking of copolymers of tetrafluoroethylene and perfluoroalkylethylene by heating in the presence of K.sub.2 AF is described.

Abstract: Novel polyphenylene ether-polyamide compositions having improved compatibility, elongation and impact properties as well as improved processability are prepared comprising a polyphenylene ether, a polyamide and a property improving amount of an acyl modified polyphenylene ether compatibilization agent. These compositions may further comprise alkenyl aromatic polymer or a rubbery polymer.

Abstract: Disclosed are crosslinking compositions having both sulfur and nonsulfur curative systems which are particularly adapted for crosslinking rubber blends of (a) from about 35% to about 85% halobutyl rubber or a mixture of butyl rubber and halobutyl rubber wherein the halobutyl rubber is at least 50% by weight of the mixture and (b) from about 15% to about 65% of an epihalohydrin rubber, and to the rubber materials crosslinked therewith. The rubber materials crosslinked with these crosslinking compositions have an excellent balance of cure rate, cure state and scorch safety; have improved tire carcass adhesion and good impermeability to gases; and are useful in tire inner tubes and inner liners.

Abstract: A coating resin composition is described, comprising from 50 to 99% by weight of a thermoplastic aromatic polyether ketone resin and from 50 to 1% by weight of a perfluoroalkoxy resin or a tetrafluoroethylene/hexafluoropropylene copolymer resin having hexafluoropropylene content of from 18 to 25% by weight. The composition, when applied to a steel plate, for example, produces a coating film which is greatly improved in water repellency while retaining the desirable properties of the polyether ketone, such as high heat resistance, good mechanical and electrical properties, and high chemical resistance.

Abstract: This invention is directed to novel aromatic polyformals comprising from about 5 weight percent to about 95 weight percent of repeating units (I) having the formula ##STR1## and from about 95 weight percent to about 5 weight percent of repeating units (II) having the formula ##STR2## in which the repeating units (I) and the repeating units (II) are connected by interbonding units (III) having the formula--CH.sub.2 -- (III)wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R.sub.1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO.sub.2, S or a direct bond, with the proviso that when R.sub.1 is SO.sub.2 then repeating unit (II) is not the same as repeating unit (I). The invention is also directed to a process for preparing the novel aromatic polyformals. The aromatic polyformals have utility as molded plastic materials, adhesives, sealants and the like.

Abstract: Moldable polymer compositions comprising a polyarylate resin and a copolymer containing recurring units of a vinyl aromatic monomer and recurring units of a maleimide monomer are disclosed.

Abstract: Described are blends of block copolymers of polyphenylene oxides and poly(aryl ether)s, a styrene based polymer or copolymer, and a poly(aryl) ether) and/or a polyphenylene oxide.

Abstract: Described are novel copolymers of polyphenylene oxides and poly(aryl ether)s. These copolymers are readily compatible with styrene polymers and copolymers and give tough blends.

Abstract: A process for preparing aromatic-moiety-containing polymers having modified physical properties is disclosed. Briefly, the process comprises reacting in the presence of a Friedel-Crafts catalyst: (a) a suitable aromatic-moiety containing polymer resin and (b) a homopolymer of .omega.-halo-.alpha.-olefins, or co- or terpolymer of .omega.-halo-.alpha.-olefins with other .alpha.-olefins and/or ethylene.

Abstract: Disclosed is a shaped body exhibiting good long-term thermal stability, comprising at least one fluorohydrocarbon polymer which can be processed by melting, and at least one heat-resistant thermoplastic polymer, wherein at least the fluorohydrocarbon polymer forms a phase which is coherent or at least largely coherent. The weight ratio of the fluorohydrocarbon polymer to the thermoplastic polymer preferably varies between about 80:20 and about 20:80. The shaped body is preferably a film used as a layer of insulation.

Abstract: A moldable and compatible blend of 5 to 95 weight percent of an aromatic polyformal comprising from about 20 weight percent to 100 weight percent of repeating units (I) having the formula ##STR1## and from 0 weight percent to about 80 weight percent of repeating units (II) having the formula ##STR2## in which the repeating units (I) and the repeating units (II) are connected by interbonding units (III) having the formula--CH.sub.2 -- (III)wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R.sub.1 is a divalent saturated or unsaturated aliphatic hydrocarbon radical, O, CO, SO.sub.2, S or a direct bond, with the proviso that when R.sub.1 is SO.sub.2 then repeating unit (II) is not the same as repeating unit (I), and 95 to 5 weight percent of a styrene copolymer or terpolymer and/or vinyl chloride containing polymers.

Abstract: A resin composition excellent in sliding characteristics, composed of 95 to 30% by weight of an aromatic polysulfone, 2.5 to 60% by weight of a fluorocarbon polymer and 2.5 to 60% by weight of an oxybenzoyl polyester.

Abstract: A resin composition comprising a polyphenylene ether resin and a rubber-modified polystyrene resin, wherein at least 80% of the rubber particles based on the total number of rubber particles in the elastomeric phase of the rubber-modified polystyrene resin have a particle diameter in the range of 0.5 to 4 microns, and the elastomeric phase has a particle size distribution index, SDI, defined by the equation ##EQU1## wherein x is the diameter in microns of the particles, and n is the number of particles having a particle diameter of x microns, of not more than 1.9.

Abstract: Phenolic resin compositions comprising a polymeric substance having a phenolic OH group such as phenol resins, and a rubber having an epoxy group and an epoxy equivalent of 500 to 30,000 such as butadiene copolymers, acrylic copolymers, chloroprene copolymers and urethane copolymers are provided. These resin compositions exhibit improved properties having overcome the drawback of brittle properties intrinsic of conventional phenolic resins, and also exhibit cold resistance; hence they are used as molding materials, laminating materials, casting materials, binders, etc. Further, molding resin compositions having improved solvent-resistance and metal insert properties are provided.

Abstract: Compositions containing a polymer of PTFE and a polymer capable of exhibiting an anisotropic melt characterized in that the compositions contain between 0.05 and 99.5% of PTFE and 0.5 to 99.95% by weight of the polymer capable of forming an anisotropic melt. The presence of a minor amount of the anisotropic melt-forming polymer, that is, from 0.5 to 50% by weight of the composition enables the processability of PTFE to be improved, even to the extent of providing an injection mouldable PTFE composition. Compositions containing 20 to 50% by weight of PTFE confer benefits on anisotropic melt-forming polymers, such as lubricity and greater versatility in fabrication operations. Concentration of 0.05 to 5.0% by weight of PTFE are particularly suitable for modifying the viscosity characteristics of the low melt viscosity anisotropic melt-forming polymers so that such anisotropic melt polymers are less subject to problems such as flashing and jetting during moulding.

Abstract: A process for preparing aromatic-moiety-containing polymers having modified physical properties is disclosed. Briefly, the process comprises reacting in the presence of a Friedel-Crafts catalyst: (a) a suitable aromatic-moiety containing polymer resin and (b) a homopolymer of .omega.-halo-.alpha.-olefins, or co- or terpolymer of .omega.-halo-.alpha.-olefins with other .alpha.-olefins and/or ethylene.

Abstract: Compositions containing a polymer of PTFE and a polymer capable of exhibiting an anisotropic melt characterized in that the compositions contain between 0.05 and 99.5% of PTFE and 0.5 to 99.95% by weight of the polymer capable of forming an anisotropic melt. The presence of a minor amount of the anisotropic melt-forming polymer, that is, from 0.5 to 50% by weight of the composition enables the processability of PTFE to be improved, even to the extent of providing an injection mouldable PTFE composition. Compositions containing 20 to 50% by weight of PTFE confer benefits on anisotropic melt-forming polymers, such as lubricity and greater versatility in fabrication operations. Concentration of 0.05 to 5.0% by weight of PTFE are particularly suitable for modifying the viscosity characteristics of the low melt viscosity anisotropic melt-forming polymers so that such anisotropic melt polymers are less subject to problems such as flashing and jetting during moulding.

Abstract: An improved flame retardant polycarbonate composition of an aromatic carbonate polymer in admixture with an organic alkali metal salt or an organic alkaline earth metal salt or mixtures thereof, which composition has in admixture therewith a fluorinated polyolefin.

Abstract: An aromatic polyester copolymer consisting of 10 to 90 mol % of a recurring unit of the formula: ##STR1## and 90 to 10 mol % of a recurring unit of the formula: ##STR2## and having a logarithmic viscosity number of at least 0.3 as measured in a mixture of phenol and tetrachloroethane (6:4 in weight ratio) at a concentration of 1 g/100 cc at 25.degree. C. and having a terminal carboxyl content of about 80 mol eq./ton or less. This aromatic polyester copolymer has high durability under dry and moist heat as well as high resistance to water crazing and hence can be fabricated into useful articles by various molding techniques.

Abstract: Phenolic resin compositions comprising a polymeric substance having a phenolic OH group such as phenol resins, and a rubber having an epoxy group and an epoxy equivalent of 500 to 30,000 such as butadiene copolymers, acrylic copolymers, chloroprene copolymers and urethane copolymers are provided. These resin compositions exhibit improved properties having overcome the drawback of brittle properties intrinsic of conventional phenolic resins, and also exhibit cold resistance; hence they are used as molding materials, laminating materials, casting materials, binders, etc. Further, molding resin compositions having improved solvent-resistance and metal insert properties are provided.

Abstract: Aromatic polyesters and polyestercarbonates based on diphenols and iso- and/or terephthalic acids become flame-proof if admixed with small quantities of ammonium or alkali metal salts of inorganic or organic acids and optionally halophthalimides and optionally polytetrafluoroethylene. The mechanical and chemical properties of the polyester (carbonates) remain unchanged.

Abstract: A process for producing a graft copolymer characterized by melt-blending 100 parts by weight of a resin mixture comprising 90 to 10% by weight of a polyphenylene oxide having a structural unit of ##STR1## (wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents hydrogen, a halogen atom, a hydrocarbon or substituted hydrocarbon radical) and 10 to 90% by weight of a styrene polymer in the presence of 0.01 to 5 parts by weight of a compound containing nitrogen and oxygen selected from oxime compounds and nitroso compounds.

Abstract: By reacting a diene polymer having nitrile groups with an anti-deteriorating agent having at least one polar group selected from the group consisting of amino group and imino group in the presence of a catalyst, a diene rubber can be obtained in which said anti-deteriorating agent is chemically combined to the nitrile groups. Said rubber per se has resistance to deterioration and, at the same time, acts as an anti-deteriorating agent for other diene rubbers. The chemically combined anti-deteriorating agent is not extractable with solvent, so that said rubber has a stable resistance to deterioration and a stable anti-deteriorating action on other diene rubbers.

Abstract: There are provided drip-retardant, plasticized thermoplastic compositions which comprise, in admixture, a polyphenylene ether resin, a plasticizer in an amount at least sufficient to provide a plasticized composition after molding, and a microfibrillar poly(tetrafluoroethylene)resin in an amount at least sufficient to render the thermoplastic composition non-dripping when molten. The present compositions meet even more stringent standards than the UL-94 flame test.

Abstract: A resin composition based on a polyphenylene ether comprising 99 to 1 part by weight of a polyphenylene ether copolymer derived from 99.5 to 85 mole-% of 2,6-dimethylphenol and 0.5 to 15 mole-% of 3-methyl-6-tert-butylphenol and 1 to 99 parts by weight of a styrene polymer (making up 100 parts by weight in total); and said resin composition further containing 0.1 to 100 parts by weight of a rubber-like polymer for 100 parts by weight of the said resin composition. These resin compositions have excellent mechanical strength, heat resistance, and moldability and are suitable as molding resin materials in practical use fields.