Abstract: Cured blends of acrylonitrile/butadiene (NBR)/epichlorohydrin rubbers are provided that are free of poisonous lead compounds with ozone resistance of 10 hours or more and good heat resistance and fuel and oil resistance. These acrylonitrile/butadiene rubbers contain 28 to 33% by weight of acrylonitrile. The epichlorohydrin rubbers are useful in this invention which contains at least 4 to 12% of allyl glycidyl ether and may contain 0 to 35% of ethylene oxide, preferably 2 to 6% and up to 15%. The acrylonitrile/butadiene rubber is preferably of so-called bound antioxidant type which contains about 1 to about 10% by weight of polymerized attached antioxidant containing monomer.

Abstract: A rubber composition permits good adhesion upon crosslinking to fiber materials and offers good adhesion after thermal aging. The rubber composition includes about 1/10 to about 1/1000 mol of an organic peroxide and either about 0.5 or about 10 parts by weight of an organic compound having two or more acrylate groups or methacrylate groups and one or more carboxyl groups in the molecular structure or about 1 to about 30 parts by weight of a carboxy-modified rubber per 100 parts by weight of a rubber crosslinkable with the organic peroxide.

Abstract: A method has been discovered for generating free radicals at saturated carbon atoms on the backbone of acrylate polymers or copolymers. This method is useful for combining at least two polymer chains at the free radical sites on each polymer chain to form a polymer or copolymer product with increased molecular weight and a controlled degree of branching. The polymers and copolymers produced by this process are useful as antiscalants, dispersants, incrustation inhibitors and superabsorbants. They are particularly useful in detergent and cleaning applications.

Abstract: The invention relates to the preparation of a graft copolymer latex of core/shell dispersion particles having improved phase binding between core and shell in a two-stage emulsion polymerization process, hydroperoxide groups being produced at the particle surface of the grafting base prior to grafting by hydrogen peroxide treatment.

Abstract: A blend of a polyolefin, such as polypropylene, with a segmented copolymer containing both polyolefin segments and segments derived from greater than 20 to about 100% of a vinyl aromatic monomer is useful in applications where high melt strength is desired.

Abstract: A method of dewatering paint spray booth sludge by adding to the water system of a paint spray booth a water soluble graft copolymer having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an, ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100%; G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.

Abstract: A modified polymer is described comprising a thermoplastic polymer composition comprising a graft copolymer between (1) a preformed thermoplastic polymer and (2) a monomer composition comprising (a) at least one polymerisable monomer containing a polymerisable group and at least one functional polymer-modifying group and (b) at least one comonomer containing at least two polymerisable groups, said copolymer being substantially free of unbound monomer. Such polymers can be produced by reacting together, in a melt and in the presence of free radicals whilst applying shear to the melt, the preformed thermoplastic polymer to be modified, the polymerisable monomer, and the comonomer, thereby to graft said monomer to said preformed polymer leaving substantially no unbound monomer, the reaction being continued for a period of time sufficient to produce a graft copolymer that is thermoplastic and can be blended with an unmodified polymer. A free radical generator can be added, if desired.

Abstract: A method for the flocculation of wastewater comprising a block copolymer having the formula: ##STR1## wherein E is a polymeric segment obtained from the polymerization of hydrophobic monomers, x when present is a nonionic monomer, y is a cationic monomer, R.sub.1 and R.sub.2 are the same or different and are H or a lower alkyl group from C.sub.1 to C.sub.3 and F is a salt of a ammonium cation. The block copolymer is added to the wastewater particularly oily wastewater, to flocculate contaminants.

Abstract: Graft copolymers comprising a poly-alpha-olefin base polymer selected from the group consisting of polyethylene, polypropylene, polystyrene, and compatible mixtures thereof, having grafted thereto an olefinic monomer. The grafted monomer is present in an amount effective to increase the amount of protein that will bind to the graft copolymer as compared with the base polymer.Also disclosed are polymer/protein compositions comprising a graft copolymer having a protein immobilized on the surface thereof, processes for the preparation of the above-described graft copolymers and compositions, methods of immobilizing proteins, and methods of immunoassay based on such immobilization.

Abstract: Process for making a polymer with desired groups Y comprising reacting a precursor polymer having carbon- or nitrogen-bound --NH.sub.2 and/or --NH-- groups with at least one compound having a single enolic carbonyl group and at least one group Y. Also the polymer itself and a composition containing it.

Abstract: A process for making a graft propylene copolymer in which a propylene polymer, selected from the group consisting of propylene homopolymers and propylene copolymers, is contacted with a polymerizable, unsaturated carboxylic acid or acid derivative in the presence of a coagent, having the structural formula (CH.sub.2 .dbd.CR.sup.1 CR.sup.2 R.sup.3.sub.x R, where R.sup.1, R.sup.2 and R.sup.3 are the same or different and are hydrogen, hydrocarbyl, halogen or a heterocyclic radical; x is an integer of 2 to 4; and R is a radical containing at least one atom of oxygen, nitrogen, sulfur, phosphorus or silicon having a valence equal to the value of x, and a free radical generating compound. This contact occurs at a temperature above both the melting point of the propylene polymer and the decomposition temperature of the free radical generating compound.

Abstract: A process for making a graft propylene copolymer in which a propylene polymer, selected from the group consisting of propylene homopolymers and propylene copolymers, is contacted with a polymerizable, unsaturated carboxylic acid or acid derivative in the presence of a coagent, said coagent selected from the group consisting of a first compound having the structural formula ##STR1## where R is a hydrocarbyl or a radical containing at least one atom of oxygen, sulfur, nitrogen, phosphorus or silicon; R.sup.1 is hydrogen or C.sub.1 -C.sub.12 alkyl or aryl; and x is an integer of 1 to 4, and a second compound having the structural formula ##STR2## where R' is a hydrocarbyl or a radical containing at least one atom of oxygen, sulfur, nitrogen, phosphorus or silicon; R.sup.2 is hydrogen or C.sub.1 -C.sub.1 2 alkyl or aryl; and y is an integer of 2 to 4, and a free radical generating compound.

Abstract: A fluorine-containing graft copolymer prepared by a step (i) of polymerizing a monomer having formula (I) and an unsaturated carboxylic acid or a monomer having a glycidyl group to obtain a copolymer, ##STR1## wherein R represents --H or --CH.sub.3 group; and A represents --COOC.sub.n H.sub.2n+1 or OC.sub.n H.sub.2n+1, in which n is an integer of 6 to 20; a step (ii) of esterifying the resulting copolymer by using a monomer having a glycidyl group in the case where a constituting monomer of the above copolymer is an unsaturated carboxylic acid, or by using an unsaturated carboxylic acid in the case where a constituting monomer of the above copolymer is a monomer having a glycidyl group; and a step (iii) of graft-polymerizing a monomer comprising at least fluoroalkyl acrylate or fluoroalkyl methacrylate on the above esterified copolymer. In addition, a toner comprising a coloring agent and a resin component which comprises the above-mentioned fluorine-containing graft copolymer is disclosed.

Abstract: A toner for developing electrostatic images contains a binder resin and a colorant or a magnetic material. The binder is prepared by polymerizing ethylenically unsaturated monomer(s) in the presence of less than 0.1% by weight of the monomer(s) of a radical polymerization initiator. The resulting polymer or copolymer is dissolved in a polymerizable monomer and solution or suspension polymerized with a radical polymerization initiator. The resulting binder resin is substantially free of fragments of radical polymerization initiator which tend to bond to molecular chain terminals.

Abstract: A method for preparing a polyolefine-vinyl composite, in which method about 10-200 weight fractions of vinyl monomer and about 0.01-4.0 weight fractions of a free radical polymerization initiator, based on 100 weight fractions of vinyl monomer, are impregnated in 100 weight fractions of polyolefine particles by slowly mixing these at a temperature of about 20.degree.-100.degree. C. while continuously or discontinuously adding about 1-60% by weight of water, based on the total weight of the vinyl monomer and the polyolefine, during the maintenance of the particle structure of the polyolefine, is disclosed. A water suspension is prepared by adding water and stabilizing agents to the above-mentioned mixture after a completed impregnation. The total quantity of water is about 80-1000 weight fractions, based on 100 weight fractions of polyolefine+vinyl monomer. The temperature of the water suspension is then increased for polymerizing the vinyl monomer.

Abstract: A process for preparing an ethylene-unsaturated polycarboxylic graft copolymer is disclosed. In this process an ethylene polymer having terminal double bond functionality is contacted with an unsaturated polycarboxylic compound in the presence of a catalytically effective amount of an organic peroxide.

Abstract: A method for preparing a polyolefine--vinyl polymer composite, wherein about 10-200 parts by weight of vinyl monomer and about 0.01-4.0 parts by weight of a free radical polymerization initiator, based on 100 parts by weight of vinyl monomer, are impregnated in 100 parts of weight of polyolefine particles by slowly mixing these at a temperature of about 20.degree.-130.degree. C. while maintaining the particle structure of the polyolefine. After 50-99% of the amount of the monomer has been absorbed into the polyolefine particles, a water suspension is prepared by adding to the above-mentioned mixture about 80-1000 parts by weight water, based on 100 parts of weight of polyolefine+vinyl monomer, as well as a stabilizing agent. The temperature of the water suspension is then increased for polymerizing the vinyl monomer.

Abstract: Disclosed are substantially non-crosslinked anhydride-modified, saturated ethylene polymers and a process for making them which comprises mixing together in the absence of solvent:(a) maleic anhydride;(b) a free radical initiator;(c) a saturated ethylene polymer; and(d) a polyamideat a temperature at which the saturated ethylene polymer and polyamide undergo deformation and are converted to a molten or fluid state.

Abstract: A composition for cross-linking of ethylene.polymer comprises 2,4-diphenyl-4-methyl-1-pentene and at least one peroxide selected from the group consisting of [1] peroxides represented by the formula (I): ##STR1## (wherein R.sup.1 stands for one member selected from the group consisting of alkyl groups, aryl groups, and alkyl-substituted aryl groups having 1 to 9 carbon atoms, R.sup.2 for one member selected from the group consisting of phenylene group, ethylene group, --C.tbd.C--, and alkyl groups, aryl groups, and alkyl-substituted aryl groups having 1 to 9 carbon atoms, and n for 1 or 2) and [2] peroxides represented by the formula (II): ##STR2## (wherein two R.sup.3 's independently stand for one member selected from the group consisting of alkyl groups, aryl groups, and alkyl-substituted aryl groups of 1 to 9 carbon atoms or jointly stand for an ethylene group, R.sup.4 and R.sup.5 independently stand for a linear or branched alkyl group of 1 to 6 carbon atoms or --(CH.sub.2).sub.m C(O)OR.sup.6 [wherein R.

Abstract: Free radical-curable halogenated polyethylene polymer compositions, which are crosslinked with the aid of a crosslinking monomer selected from the group consisting of calcium diacrylate and calcium dimethacylate coagents and, optionally an alkyl aminoalkyl phenol vulcanization inhibitor, are provided. The compositions of the invention yield cured rubber articles with markedly improved tensile strength and scorch resistance. Processes for producing a cured rubber article from the disclosed free radical-curable elastomeric compositions and cured compositions prepared from such curable compositions are also provided.

Abstract: A water soluble graft copolymer useful for dewatering wastewater having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an .alpha., .beta. ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100% G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.

Abstract: Rubber compositions are disclosed which are tailored to exhibit high adhesion to brass, sufficient resistance to heat and to oil and great elasticity. A selected class of highly hydrogenated acrylonitrile copolymer rubbers are blended with specified amounts of a selected class of trially isocyanurate compounds, organic sulfur-containing compounds or sulfur donors and organic peroxides. Also disclosed is a hose built with an inner tube formed from the above rubber composition and a reinforcing layer from a pressure-resistant, metallic wire plated with brass.

Abstract: The mixture consists of at least one organic peroxide, at least one hydroquinone derivative of the general formulae I and/or II and/or III ##STR1## wherein R and R.sup.1, which may be identical or different, stand for H or t-alkyl, and X stands, for example, for C.sub.1-18 -alkylene, and a crosslinkage promoter, and permits the crosslinkage of polymers and at the same time extends the scorch time, which must be understood as the processing time.

Abstract: An oil soluble nitrogen containing grafted degraded ethylene copolymers useful as multifunctional viscosity index improvers or modifiers, such as VI improver-dispersant additives. The nitrogen containing grafted degraded ethylene copolymers are grafted with an ethylenically unsaturated carboxylic acid grafting material and the grafted degraded ethylene copolymers are then reacted with at least one polyamine containing one primary amine group and at least one or more secondary amine groups.

Abstract: This invention relates to vinyl monomer compositions having accelerated surface cure characteristics. These compositions are prepared from a vinyl monomer or monomer mixtures such as blend of isobornyl methacrylate and hydroxypropyl methacrylate, a bulk phase polymerization catalyst system, a polyvalent metal oxidative surface phase catalyst, and a diolefin rubber dispersed in the vinyl monomer as a surface cure accelerator. These compositions are useful as sealers, healers and for polymer concrete.

Abstract: A two-component adhesive composition for the chemical fixing technique comprises a radical-curable synthetic resin having a viscosity of from 100 to 10 000 mPa.s at 23.degree. C. and spatially separated therefrom--a curing agent of the synthetic resin. The synthetic resin contains as binder a di(meth)acrylate of an alkoxylated bisphenol. The adhesive composition is for use in fixing anchor bolts, screws and plugs in drilled holes.

Abstract: The subject invention relates to segmented fluoropolymers of the A-B-A type where A is a crystallizable fluoropolymer segment, and B is a base-resistant elastomeric fluoropolymer segment, the segmented fluoropolymers being useful as thermoplastic fluoroelastomers which are highly resistant to attack by bases. The fluoroelastomers are useful, for example, in O-rings and shaft seals in internal combustion engines using aggressive oils and in oil well applications.

Abstract: An improved process for the polymerization of styrene is provided. The process comprises feeding styrene monomer and a mixture of peroxides, which decompose at progressively higher temperatures, into a prepolymerization vessel maintained at 200.degree.-270.degree. F. About 20-40% of the styrene in this vessel is converted to polymer (depending on temperature and residence time) and then fed to an extruder where the polymer is raised in temperature by passage through a heat exchanger or through the heated throat of the extruder. During this heating, the polymerization is completed in seconds to minutes in an extruder as the peroxides decompose in sequence as the temperature rises. A final devolatilization zone is provided to remove the final traces of monomer. The molten polymer is then passed through a die and stranded or hot die face cut.

Abstract: An improved process for the preparation of .alpha.-methylstyrene polymers by aqueous emulsion polymerization in which a styrene monomer mixture is first polymerized in a quantity of from 0.5 to 8% by weight of the total quantity of monomers and thereafter an .alpha.-methylstyrene monomer mixture is polymerized batchwise or semi-continuously.

Abstract: The invention relates to a process for the modification of an olefin polymer to form a coupling agent by grafting it with an unsaturated acid or acid derivative in the presence of a free-radical initiator. The process comprises stages at whicha) the olefin polymer, the unsaturated acid or acid derivative and a first free-radical initiator are heated together to a temperature at which the first free-radical initiator substantially breaks down into free radicals, andb) the reaction mixture derived from stage a) is heated together with a second free-radical initiator to a temperature at which the second free-radical initiator substantially breaks down into free radicals. By the process, olefin polymers can be modified effectively without their macromolecules degrading excessively.

Abstract: Graft copolymers and processes for the preparation thereof are provided. The copolymers comprise a base polymer having grafted thereto a monomeric 2-alkenyl azlactone. The surface properties of the graft copolymers can be modified by binding thereto nucleophilic reagents comprising further functional groups with desired properties. Further, the amount of azlactone available at the surface of a graft copolymer for binding to such nucleophilic reagents can be controlled by selecting a surface against which the graft copolymer is formed. The graft copolymers exhibit desirable thermoplastic, melt flow, and adhesion properties and are particularly useful for immobilizing proteins. Methods of immunoassay based on the immobilization of proteins are also disclosed. Another utility of the graft copolymers involves the compatibilizing of immiscible polymer blends.

Abstract: An ester type polymeric peroxide; has a peroxide group of the formula (I): ##STR1## a group of the formula (I') ##STR2## a group of the formula (II) ##STR3## wherein X stands for one member selected from the group consisting of --CH.sub.2 --CH.sub.2 --, --C.tbd.C-- and ##STR4## continuously bound such that I and I' occur randomly in alternation with II, having a (I):(I') molar ratio in the range of from 9:1 to 1:9 and the [(I)+(I')]:(II) molar ratio in the range of from 6:4 to 4:6, and having an average molecular weight in the range of from 1,000 to 20,000, a polymerization initiator for vinyl type monomer comprising said ester type polymeric peroxide and method for the production of a block copolymer of vinyl type monomer by said polymerization initiator.

Abstract: A method for manufacturing vinyl chloride-butyl acrylate graft copolymers for processing by injection molding is provided wherein vinyl chloride is grafted onto crosslinked polybutyl acrylate in the presence of chain regulators. The graft copolymers exhibit excellent flow characteristics as a melt and provide molded parts with good surface quality and excellent mechanical properties.

Abstract: A composition for cross linking an ethylene polymer comprises an organic peroxide as a cross linking agent and a compound represented by the formula: ##STR1## wherein R stands for a hydrogen atom or one member selected from the class consisting of alkyl groups of 1 to 9 carbon atoms and n is an integer of 2 or 3. A method for cross linking the ethylene type polymer uses the composition mentioned above. An electric power cable comprises a core coated with resinous layers produced by the method described above.

Abstract: Graft copolymers obtained byA) emulsion polymerization of from 5 to 35% by weight of a monomer mixture ofa.sub.1) 60-80% by weight of one or more vinylaromatic monomers,a.sub.2) 20-40% by weight of one or more ethylenically unsaturated nitriles,B) subsequent emulsion polymerization, in the presence of the emulsion polymer obtained in stage A), of 20-45% by weight of a monomer mixture ofb.sub.1) 50-75% by weight of one or more vinylaromatic monomers,b.sub.2) 25-50% by weight of one or more C.sub.1 -C.sub.18 -alkyl acrylates,C) subsequent emulsion polymerization, in the presence of the emulsion polymer obtained in stage B), of 5-35% by weight of a monomer mixture ofc.sub.1) 60-80% by weight of one or more vinylaromatic monomers,c.sub.2) 20-40% by weight of one or more ethylenically unsaturated nitriles,D) subsequent emulsion polymerization, in the presence of the emulsion polymer obtained in stage C), of 15-45% by weight of a monomer mixture ofd.sub.1) 80-99.9% by weight of one or more C.sub.1 -C.sub.

Abstract: A pigment dispersing agent for paints is constituted with a particular acrylic polymer component having a tertiary amino group and/or a nitrogen-containing heterocyclic ring and a particular polyester component, and has particular number average molecular weight and amine value. This pigment dispersing agent is applicable to both acrylic resin series and polyester resin series paints as well as thermosetting type paints.

Abstract: A feed containing 100 parts by weight of reactants consisting of 88 to 98% by weight of a styrene-based monomer or its mixture with other comonomers and 2 to 12% by weight of high-viscosity rubber with a viscosity of 400 to 2,000 centipoises in a 5% by weight styrene solution at 25.degree. C., 0.01 to 0.2 part by weight of an organic peroxide, and 0 to 30 parts by weight of an inert organic solvent is supplied continuously to the first complete mixing type reactor where it is polymerized under the condition prevailing before the rubber phase inversion, the initial reaction mixture is withdrawn continuously and supplied to the second complete mixing type reactor where the rubber is transformed into particles with the conversion of the monomers in the reactants held at 40% by weight or less, and the conversion is raised in the following reactor to yield impact-resistant rubber-modified styrene resins containing rubber particles with a weight average particle diameter of 1.5 to 4 .mu.m.

Abstract: A composition and method of use thereof for the treatment of wastewater comprising a block copolymer having the formula: ##STR1## wherein E is a polymeric segment obtained from the polymerization of hydrophobic monomers, x when present is a nonionic monomer, y is a cationic monomer, R.sub.1 and R.sub.2 are the same or different and are H or a lower alkyl group from C.sub.1 to C.sub.3 and F is a salt of an ammonium cation.

Abstract: A rubber-modified styrene-based resin composition comprising (A) 70 to 92% by weight of a styrene-based polymer and 30 to 8% by weight of a rubbery polymer wherein the rubbery polymer is dispersed in the styrene-based polymer in the form of particles having an occlusion structure with a plane of symmetry, an area average particle diameter of 0.1 to 0.7 .mu.m, and a ratio of area average particle diameter to number average particle diameter of 1.0 to 2.5, the weight ratio of gel content to rubbery polymer is 1.1:1 to 4.0:1, and the swelling index is 5 to 20. The styrene-based resin composition has excellent physical properties and can be used as a material for office automation equipment, home electric appliances, sheets and so on.

Abstract: A graft copolymer resin composition having improved impact resistance, particularly at low temperature, obtained by emulsion-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer, optionally together with an ethylenically unsaturated monomer copolymerizable therein under specific conditions by the action of a polymerization initiator in the presence of a latex of a conjugated diene polymer under specific conditions.

Abstract: A process for producing monodispersed fine particles of a vinyl polymer is disclosed, which comprises polymerizing monomers containing at least one vinyl monomer selected from the group consisting of aromatic vinyl compounds, acrylic esters, and a methacrylic ester in the presence of (1) a surface active agent represented by formula (I) ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a substituted or unsubstituted alkyl group having from 4 to 8 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted cyclohexyl group and M represents an alkali metal, (2) from 10.sup.-3 to 10.sup.-1 mol/l of a persulfate as a polymerization initiator, and (3) from 10.sup.-4 to 10.sup.-2 mol/l of a divalent metal sulfate as an electrolyte. Monodispersed vinyl polymer fine particles having a particle size of 1 .mu.m or greater with a very narrow size distribution are obtained.

Abstract: A fluorine-containing elastomer composition comprising a specific fluorine-containing elastomer having iodine bonded thereto and having a multimodel molecular weight distribution, a specific vulcanizing agent, an organic peroxide, and a polyfunctional unsaturated compound. The fluorine-containing elastomer composition has not only excellent processability, mold release properties and burr-removal performance in molding but also capability of providing a vulcanization product which is not only improved with respect to mechanical properties, but also has extremely excellent resistance to chemicals and solvents, particularly methanol, and good metal-adhesion properties.

Abstract: There is here provided a thermoplastic resin composition which comprises (I) 99 to 1% by weight of an aromatic polyester resin, (II) 1 to 99% by weight of at least one kind of resin selected from the group consisting of a polyphenylene ether resin, a mixture of the polyphenylene ether resin and a styrene polymer, a polycarbonate resin, and a polyarylene sulfide resin, (III) 0.1 to 100 parts by weight, based on 100 parts by weight of the aforesaid resins (I)+(II), of a multi-phase structure thermoplastic resin which is composed of 5 to 95% by weight of an epoxy group-containing olefin copolymer and 95 to 5% by weight of a vinyl polymer or copolymer obtained from at least one kind of vinyl monomer, either of both the components being formed with a dispersion phase having a particle diameter of 0.001 to 10 .mu.m. A method for preparing the above-mentioned thermoplastic resin composition is also provided here.

Abstract: Fluoroelastomer compositions with terminal iodo groups and having improved low temperature properties in the cured state.

Abstract: A water soluble graft copolymer useful for dewatering wastewater having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an .alpha.,.beta. ethylenically unsaturated compound the molar percentage of a:b is from about 95:5 to 5:95 with the proviso that the sum of a and b equals 100%; G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.

Abstract: Hydrogenated nitrile rubber based vulcanizates which have at least one of improved load bearing capabilities, improved abrasion resistance and reduced heat build-up are provided, the vulcanizates having been produced by vulcanization of a compound consisting essentially of 100 parts by weight of hydrogenated nitrile rubber, 10 to 85 parts by weight of zinc diacrylate and 1 to 10 parts by weight of an organic peroxide. Such vulcanizates are useful in belts, rolls and hoses.

Abstract: A graft copolymer produced by polymerizing 2-hydroxyethyl methacrylate, or monomer mixture containing the monomer, by using initiator produced by copolymerizing (A) N-vinyllactam or styrene and (B) peroxy-fumarate or combination of the peroxy-fumarate and diester of fumaric acid, the peroxy-fumarate being represented by the formula (I): ##STR1## wherein R1 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 18 carbon atoms, or an aromatic hydrocarbon group containing 6 to carbon atoms; and R2 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 13 carbon atoms, or a phenyl group.A solution for treating a contact lens, including the above graft copolymer and a solvent dissolving the copolymer.

Abstract: A process for producing a toner resin by a two-step suspension polymerization process, which entails preparing a polymer of high molecular weight having a weight average molecular weight of greater than about 350,000 from at least one monomer having a polymerizable vinyl group using a compound having at least three t-butyl peroxide groups in one molecule, as a polymerization initiator, and then preparing a low molecular weight polymer in the presence of the high molecular weight polymer. A toner having an excellent fixing property and offset resistance can be obtained from the above resin.

Abstract: Following this procedure for the production of thermoplastic elastomer mixtures, dynamic vulcanization is performed at temperatures ranging between approximately 125 and 250 deg. C. and preferably between 150 and 200 deg. C., and with the aid of a free radical generating agent, on a mixture made up of: a) 95-60% by weight of one or several thermoplastic block copolymers of a monoalkenylarene and a coupled diene having at least two end blocks of monoalkenylarene polymer A and at least one middle block of a polymer of coupled diene O the content of said block A ranging between approximately 8 and 55% by weight respect to the copolymer, whose flow rate must exceed 0.01 and b) 5-40% by weight of one or several copolymers of ethylene and vinyl acetate, containing approximately between 5 and 50% by weight of vinyl acetate, preferably between 15 and 35% of vinyl acetate and with a flow rate between approximately 0.1 and 50, preferably between 0.1 and 10.

Abstract: The invention relates to an improved process for producing a rubber-modified styrene resin, and a rubber-modified styrene resin composition resulting therefrom, such resin having improved mechanical strength, impact resistance and high gloss, such being accomplished by producing a rubber-modified styrene resin containing substantially no rubber particle having a density of not higher than 0.96 gm/cm.sup.3 at 25.degree. C.