Abstract: A polyphenylene ether thermoplastic resin composition excellent in impact resistance, particularly surface impact strength, which comprises a blend of: 95 to 5 parts by weight of a mixture of:(A) 1 to 100% by weight of a polyphenylene ether resin and(B) 0 to 99% by weight of an alkenyl aromatic resin, with(C) 5 to 95 parts by weight of a graft copolymer obtained by graft-copolymerizing (a) an alkenyl aromatic compound and, if necessary, (b) other unsaturated monomer onto (c) an ethylene-.alpha.-olefin copolymer rubber having a ratio (Q value) of weight average molecular weight/number average molecular weight as measured by GPC of 4.0 or less and having a Mooney viscosity at 121.degree. C. of 40 or more, in which graft copolymer the weight ratio of (a) the alkenyl aromatic compound/(b) the other unsaturated monomer/(c) the ethylene-.alpha.-olefin copolymer rubber is 20-80/0-18.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers comprising: (a) a first prepolymer which comprises the reaction product of an at least essentially semicrystalline hydroxy-functional material and a polyisocyanate; (b) a second prepolymer which comprises the reaction product of a poly(tetramethylene glycol) ether and a polyisocyanate; and (c) a third prepolymer which comprises the reaction product of an essentially amorphous hydroxy-functional material and a polyisocyanate. The blend may also include a fourth prepolymer which comprises the reaction product of a slightly branched hydroxy-functional material and a polyisocyanate.

Abstract: The present invention relates to a process for the preparation of plastics containing thermoplastic polyurethanes and optionally other components comprising (a) melting and homogenizing a thermoplastic polyurethane in an extruder, and (b) adding an isocyanate to said extruder containing the melted and homogenized thermoplastic polyurethane.

Abstract: Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form peroxy-containing polymers, which in turn can be used to prepare block and graft copolymers, have the following Formula I: ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y.sup.1, Y.sup.2, Y.sup.3, Z.sup.1, Z.sup.2, x, y and z are as defined in the Summary of the Invention. The compounds of Formula I may be prepared by reacting hydroxy-containing tertiary hydroperoxides with diacid halides, phosgene, dichloroformates, diisocyanates, anhydrides and lactones to form the functionalized peroxides. These reaction products may be further reacted, if desired, with dialcohols, diamines, aminoalcohols, epoxides, epoxy alcohols, epoxy amines, diacid halides, dichloroformates and diisocyanates to form additional functionalized peroxides.

Abstract: Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form peroxy-containing polymers, which in turn can be used to prepare block and graft copolymers, have the following Formula I: ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y.sup.1, Y.sup.2, Y.sup.3, Z.sup.1, Z.sup.2, x, y and z are as defined in the Summary of the Invention. The compounds of Formula I may be prepared by reacting hydroxy-containing tertiary hydroperoxides with diacid halides, phosgene, dichloroformates, diisocyanates, anhydrides and lactones to form the functionalized peroxides. These reaction products may be further reacted, if desired, with dialcohols, diamines, aminoalcohols, epoxides, epoxy alcohols, epoxy amines, diacid halides, dichloroformates and diisocyanates to form additional functionalized peroxides.

Abstract: Compatible polymer blends containing A) 0.5-99.5 wt. %, preferably 50 to 90 wt. % of a polyphenylene ether, synthesized from units of formula (I) ##STR1## where R.sub.1 stands for an optionally substituted cycloalkyl group or alkoxyl group having 1 to 8 carbon atoms or an optionally substituted aryl group having 6 to 10 carbon atoms or for chlorine, where R.sub.2 stands for an optionally substituted cycloalkyl group or alkoxyl group having 1 to 8 carbon atoms or an optionally substituted aryl group having 6 to 10 carbon atoms or for chlorine, and B) 99.5-0.5 wt. %, preferably 50 to 10 wt. % of a polyaryl(meth)acrylate containing 20-100 wt. % of monomers of the formula (II) ##STR2## where R.sub.3 stands for hydrogen or methyl, Q stands for an alkylidene group having 1 to 6 carbon atoms or a group --(CH.sub.2).sub.m --O--, where m denotes a number from 2 to 6,x stands for zero or 1 andR.sub.

Abstract: A tire sidewall composition having improved properties is provided. The composition comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene, and an unsaturated rubber, such as natural rubber. Tires comprising the sidewalls are also provided.

Abstract: A thermoplastic molding material consists of from 5 to 95% by weight of a polyaryl ether A, from 5 to 95% by weight of a partly aromatic copolyamide B and, if required, not more than 40% by weight of a fibrous or particulate filler C or a mixture thereof, the percentages being based on the sum of A to C.

Abstract: A process for the modification of a polyphenylene ether resin composition is claimed, said process being carried out in a temperature range of between the melting point and the degradation point of said resin composition and in the presence of an effective amount of a citraconimide compound to reduce the melt viscosity of said resin composition, said citraconimide compound being represented by formula (I), wherein X is selected from the group consisting of hydrogen, C.sub.1 -C.sub.18 alkyl groups, C.sub.2 -C.sub.18 alkenyl groups, C.sub.2 -C.sub.18 alkynyl groups, C.sub.3 -C.sub.18 cycloalkyl groups, C.sub.3 -C.sub.18 cycloalkenyl groups, C.sub.3 -C.sub.18 cycloalkynyl groups, C.sub.6 -C.sub.18 aryl groups, C.sub.7 -C.sub.30 aralkyl groups, C.sub.7 -C.sub.30 alkaryl groups, and C.sub.7 -C.sub.30 alkernaryl groups, all of which may be linear or branched and unsubstituted or substituted with one or more amino, carboxy, cyano, halogens, esters, oxiranes, ethers, nitro, hydroxy and alkoxy groups.

Abstract: A molding resin composition comprising 99.9 to 50% by weight of polyimide represented by the formula: ##STR1## and 0.1 to 50% by weight of polyether ketone resin and/or polyester resin, and more particularly comprising the polyester resin capable of forming an anisotropical molten phase at a temperature of 420.degree. C. or less, and a polyimide-based molding resin composition which comprises the said resins and other additives such as phenolic resin, fluororesin, graphite, carbon fibers, aromatic polyamide fibers, potassium titanate fibers and a crystallization accelerator, and is excellent in thermal resistance, chemical resistance, mechanical strength and processability.

Abstract: Thermoplastic urethane elastomeric alloys are obtained by melt compounding at least one first component that is a polyurethane elastomer having at least one plasticizer reacted therein, this first component being formed by heating a reaction mixture comprising at least one isocyanate having a functionality of less than about 2.2, at least one long chain polyol, at least one chain extender and at least one plasticizer in specified amounts at a temperature of at least about 330.degree. F. (165.6.degree. C.), with at least one second component that is another thermoplastic elastomer not within the definition of the first component.

Abstract: The present invention is concerning a binder resin for an electrophotographic toner, which comprises a mixture of polymers comprising styrenic monomer units with or without acrylic or methacrylic monomer units. This binder resin has at least one peak in the range of each molecular weight of less than 30,000 and not less than 150,000 in the molecular weight distribution by the GPC analysis. The binder resin of the present invention satisfies sevelal specified inequalities concerning the relations among the molecular weight distribution, the glass transition temperature and the rheological characteristics of said resin. The binder resin of the invention satisfies all properties of the lowest fixing temperature, the lowest temperature when the hot offsett was observed and the running stability, which is important as a properties of the toner, in a higher level than the previous ones.

Abstract: A molding resin composition comprising 99.9 to 50% by weight of polyimide represented by the formula: ##STR1## and 0.1 to 50% by weight of polyether ketone resin and/or polyester resin, and more particularly comprising the polyester resin capable of forming an anisotropical molten phase at a temperature of 420.degree. C. or less, and a polyimide-based molding resin composition which comprises the said resins and other additives such as phenolic resin, fluororesin, graphite, carbon fibers, aromatic polyamide fibers, potassium titanate fibers and a crystallization accelerator, and is excellent in thermal resistance, chemical resistance, mechanical strength and processability.

Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. Cationic polymers alone or in combination with cement or lime are highly effective agglomerating agents in acidic or alkaline leaching operations. The cationic polymers are preferably graft copolymers, block copolymers or linear copolymers of acrylamide and diallyl dimethyl ammonium chloride.

Abstract: Compositions (I), (II) and (III) comprising compounds having vinyl groups as side chains and epoxidized compositions (XI), (XII) and (XIII) thereof, which can be prepared by the various reaction combinations of (a) with (b) or (b)+(c), and or (d), where(a) is at least one compound having at least one vinyl group and one epoxy group in the molecule; (b) is at least one of a polybasic compound, an anhydride thereof, a polymer having carboxylic groups at terminals and a polymer having carboxylic groups as side chains; (c) is at least one organic compound having at least one active hydrogen atom; and (d) is at east one of an unsaturated monocarboxylic compound or an unsaturated monocarboxylic ester having a hydroxyl group.

Abstract: A polymide comprises structural units represented by the following formula: ##STR1## wherein Ar is a group consisting of 10-90 mole % of a first specific structural sub-unit and 90-10 mole % of a second particular structural sub-unit. A process for the production of the polyimide and a thermosetting resin composition comprising the polyimide and a particular polymaleimide are also disclosed.

Abstract: A resin composition for a harness part, which composition comprises (A) from 50 to 70% by weight polyamide composition comprising (A1) an unmodified polyamide 66 and (A2) a modified polyamide 6 having a terminal amino group content of 7.times.10.sup.-5 to 12.times.10.sup.-5 eq/g, with the weight ratio of the unmodified polyamide 66 (A1) to the modified polyamide 6(A2) being from 80/20 to 50/50 by weight, and (B) from 30 to 50% by weight polypropylene graft-polymerized with 0.3 to 0.6% by weight of maleic anhydride.

Abstract: A process for continuously preparing rubber modified styrene resins from styrene monomers and acrylonitryle monomers in the presence of a rubbery polymer in accordance with a continuous mass and/or solution polymerization method by the use of serial polymerization device comprising two or more reactors; said process comprising(1) a first step of feeding a polymeric materials to the first reactor to carry out the polymerization of monomers in a condition where the rubbery polymer is not inverted to the dispersed phase, and a second step of adding a polymeric materials to second reactors to carry out the polymerization of the monomers and to thus invert the rubbery polymer to the dispersed phase,(2) a ratio of the added materials to the materials used in the first step being in the range of from 10 to 220% by weight,whereby impact resistance and surface gloss can be remarkably improved.

Abstract: Disclosed is a thermoplastic resin composition comprising a polyphenylene ether and a polyamide and excellent in impact strength wherein an impact strength modifier having structure A--B--A (A or B is styrene) is partially dispersed in said polyphenylene ether and has layered or spherical structure of about 0.02-0.07 .mu.m.A process for producing the thermoplastic resin composition is also disclosed which comprises (1) previously melt kneading (i) at least one compatibilizing agent in an amount effective for compatibilization and (ii) a polyphenylene ether, and then (2) adding (iii) a polyamide in an amount necessary for formation of continuous phase and (iv) an impact strength modifier having structure A--B--A (A or B is styrene) and melt kneading the mixture at a maximum shear rate of 700 sec.sup.-1 or more.

Abstract: A homogeneous polymer blend is disclosed containing components A and B. Accordingly A is about 1 to 30% by weight of a rigid, rod-shaped polymer having a persistence length of at least 10 nm and a ratio of molecular length to molecular diameter of at least 30, and B) is about 70 to 99% by weight of a flexible polymer which contains at least one member selected from the group consisting of non-ionic polar groups, ionic groups and groups convertible into ions. The flexible polymer is any one of polyolefins, polyacrylates, polyamides and polyurethanes. Component A) contains at least one chemically fixed member selected from the group consisting of non-ionic polar group, ionic group and a group convertible into ionic group, in an amount sufficient to render said A) and B) compatible one with the other.