Abstract: A curable resin composition comprising a mixture and/or a preliminary reaction product of (a) polyfunctional cyanate ester, prepolymer of the cyanate ester, or coprepolymer of the cyanate ester and an amine, and (b) cyclopentadiene or polycyclopentadiene and a curable resin composition comprising a mixture or a preliminary reaction product of above component (a), above component (b) and (c), a polyfunctional maleimide, prepolymer of the maleimide or coprepolymer of the maleimide and an amine are disclosed. Cured resin having excellent impact-resistance, adhesive power, heat-resistance and chemical-resistance can be prepared from the compositions.

Abstract: Homogeneous blends of polyphenylene ether resin and copolymers of styrene and 4-tert-butylstyrene are described. Rubber modifiers can be included in the copolymer or the blend. The blends are moldable into highly ductile articles having higher heat distortion temperature.

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: A polyphenylene ether resin composition having improved heat stability and good color, said composition comprising a polyphenylene ether resin matrix, and dispersed therein, a diphosphonite of the formula ##STR1## wherein R.sub.1 groups are identical or different and each represents a linear or branched alkyl group having 1 to 10 carbon atoms.

Abstract: This invention relates to unique and novel blend compounds of an amine neutralized sulfonated elastomeric polymer and an unsulfonated elastomeric or thermoplastic polymer. These compounds can also be blended with fillers and/or oils when the sulfonated polymer is elastomeric. The materials display thermoplastic character.

Abstract: An improved polyphenylene ether composition and process for production are disclosed. Benzoic anhydride is reacted with polyphenylene ether polymer, preferably under conditions of extrusion, to produce a composition having improved color and/or color stability.

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: This invention provides novel thermoplastic molding compositions of a polyphenylene ether resin, an EPR rubber, a triaryl phosphate or an EPDM modified alkenyl aromatic resin or a combination of a triaryl phosphite and an EPDM modified alkenyl aromatic resin.

Abstract: Polyphenylene oxide blended with SAN or ABS polymers containing from 2 to 8% by weight of acrylonitrile have highly advantageous combination of strength and distortion temperature.

Abstract: Solid copolymer tackifying resins based on dicyclopentadiene, a vinylaromatic hydrocarbon and a benzene carrying 1 to 3 lower alkyl, hydroxyl or halogen substituents and adhesive formulations containing these resins.

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: Novel molding compositions are disclosed which comprise a polyphenylene ether resin, an alkenyl aromatic resin and EPDM rubber.

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.

Abstract: An improved method for dispersing an inorganic pigment uniformly in polyphenylene ether resins. A polyphenylene ether composition having an inorganic pigment uniformly dispersed therein is obtained by intimately mixing a polyphenylene ether resin and the inorganic pigment in a weight ratio of from 0.5:1 to 2:1 by a high-speed mixer to form a pre-blend, and then mixing the pre-blend intimately with a polyphenylene ether in a conventional mixer such as an extruder. The pre-blend can also be uniformly dispersed in a mixture of the polyphenylene ether with polystyrene, a styrene/butadiene copolymer, a styrene/butadiene/acrylonitrile terpolymer, or a rubber-modified high impact polystyrene.

Abstract: Described herein are molding compositions comprising a blend of (a) a polyarylate derived from a dihydric phenol and a mixture of isophthalic acid and terephthalic acid, of which more than about 65 mole percent is terephthalic acid, (b) a polyarylate derived from a dihydric phenol and a mixture of terephthalic acid and isophthalic acid, of which more than about 70 mole percent is isophthalic acid, and (c) at least one thermoplastic polymer compatible therewith. An article molded from these compositions has a good balance of mechanical properties and improved environmental stress crack resistance.

Abstract: Thermoplastic blends having superior capability and homogeneity comprising a poly(phenylene oxide) resin and a resin of poly(methyl ethenyl benzene) isomers in which the predominant isomer is 1-methyl-4-ethenyl benzene, are disclosed. The poly(phenylene oxide) resin can contain substituted phenylene units and the poly(methyl ethenyl benzene) resin can be a polymer of solely methyl ethenyl benzene isomers, or a random, block or graft copolymer comprising 50 weight percent or more of methyl ethenyl benzene isomers and up to 50 weight percent of other ethylenically unsaturated monomers.

Abstract: Polyarylene ester compositions comprising an intimate admixture of polyarylene ester and up to about 10 weight percent of an elastomeric ethylene 1-alkene copolymer. The compositions possess greatly improved impact resistance and reduced notch sensitivity in comparison with the polyarylene ester and exhibit improved melt flow with minimal loss in flame retardance, heat distortion resistance and tensile properties. The compositions are useful as molding powders and sheet extrusion compounds.

Abstract: A process for producing carbo-chain homopolymers, block- and random copolymers of conjugated dienes and vinylaromatic monomers comprising polymerization of dienes, vinyl- or di-vinylaromatic monomers or copolymerization thereof in a medium of a hydrocarbon solvent at a temperature ranging from -30.degree. to +150.degree. C. in the presence of an organolithium catalyst of the formula R(Li).sub.x, wherein R is a hydrocarbon radical or a diene polymer, x is an integer of from 1 to 4, and a modifying additive which is a compound comprising a product of interaction between a phenolamine resin and an alkali metal and having the general formula: ##STR1## wherein n is an integer of from 1 to 10;M is sodium or potassium;R is an alkyl with 2 to 20 carbon atoms or an arylalkyl with 7 to 20 carbon atoms;R.sub.1 is an alkyl with 1 to 6 carbon atoms, an arylalkyl with 7 to 9 carbon atoms or hydrogen;this modifying additive is used in an amount of from 0.07 to 2.0 g/equiv. per one g/equiv. of active lithium.

Abstract: A flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and a minor amount of a mixture of a metal salt of an organic sulfonate or organic carboxylate, and an organic halogenated compound.This invention relates generally to flame retardant polycarbonate compositions and more particularly to flame retardant compositions containing an aromatic carbonate polymer and a minor amount of a mixture of a metal salt of an organic sulfonate or organic carboxylate, and an organic halogenated compound.

Abstract: Filled thermoplastic resin compositions are provided wherein the filler component is compatible with and does not deleteriously affect the physical properties of the resin. The filler employed is a particulate, solid sphere which can be pre-treated with a surface active agent prior to being incorporated in the resin. The resin composition can also contain other ingredients such as impact modifiers, glass fillers, and the like.

Abstract: Novel, rubbery copolymers of ethylene with at least one other .alpha.-alkene such as propylene, and a polyene such as 5-ethylidene norbornene-2, characterized by a differential scanning calorimetry thermogram maximum peak at a temperature between -7 and +11.degree. C., are disclosed. These specific rubbery copolymers when one or more tackifiers are included therein, exhibit an unprecedentedly high tack and consequently provide for the first time EDPM-type compositions that have sufficient building tack for the manufacture of multi-ply articles such as tires.

Abstract: A composition for use as a binder in a non-aqueous printing ink which comprises a modified hydrocarbon resin containing carboxylic acid units, the carboxylic groups of which are partially esterified with a polyhydric alcohol in such an amount that the modified hydrocarbon resin product contains from 0.01 to 0.7 ester groups of polyhydric alcohol based on each acid group originally present and a process for its preparation.

Abstract: There is provided a process for improving the color of resinous compositions consisting of, or including, polyphenylene ether resins by contacting such resins with an amine. The process is carried out generally at elevated temperatures and pressures with either a primary, secondary or tertiary amine.