Abstract: An olefin copolymer rubber graft composition having a viscoelastic performance index of not greater than 100 as defined by the expressionPI=(DS.times.MV)/i.v.where DS is the die swell of the composition, MV is the melt viscosity of the composition and i.v. is the intrinsic viscosity of a resinous portion extracted from the composition.

Abstract: A primer composition for use in the bonding of asphalts comprising the reaction product of an elastomer and a terpene resin. The primer composition of this invention can be used in the treatment of substrates to which asphalts are bonded to improve the bonding relationship between the substrate and the asphalt, such as in road-paving applications, roofing applications and the like.

Abstract: A process for preparing graft styrene copolymers is effected by a two-stage polymerization of styrene in the presence of an EPDM elastomer and styrene block copolymer. The resultant graft styrene copolymer has a fine microstructure, good impact resistance and good resistance to aging.

Abstract: The present invention relates to a photopolymerizable composition comprising a polymerizable, polyethylenically unsaturated compound, benzil and/or fluorenone, a specific biphenyl ketone such as para-phenyl benzophenone, and a reducing agent such as a tertiary amine. The present composition permits rapid and complete curing. Moreover, in the photopolymerization of compounds sensitive to air inhibition non-tacky surfaces are obtained. The effect observed is based on a synergism between the present photoinitiators. The advantages of the invention are most manifest in curing relatively thick layers of materials.

Abstract: Reclamation of vulcanized rubber is effected by a method which comprises heating powdered vulcanized rubber to a temperature for desulfurization of the rubber and, on completion of the desulfurization, quickly cooling the desulfurized rubber to a temperature at which substantially no oxidation of desulfurized rubber proceeds. This method obviates otherwise indispensable incorporation of process oil or other similar additive to the powdered vulcanized rubber for the purpose of retarding the oxidation of rubber molecules. When the reclaimed rubber obtained by this method is blended with newly supplied rubber, the resultant vulcanized rubber shows sparing degradation of physical properties.

Abstract: A water-dilutable epoxide which is free from glycidyl ester and glycidyl ether groups, characterized in that it contains, in addition to at least one epoxide group, at least one ester group of a monocarboxylic acid and a further ester group which is vicinally arranged thereto, this further ester group having been obtained by reaction of an OH group with a polycarboxylic monoanhydride, wherein the second COOH group formed from the anhydride by the esterification occurs wholly or partially in the form of a salt with a base; processes for preparing it and the use thereof in aqueous media or media compatible with water.

Abstract: A rubber composition suitable for use in tire tread is disclosed, which contains at least 20 parts by weight of a block copolymer per 100 parts by weight of total rubber content. This block copolymer comprises (A) a polymer segment obtained by starting from conjugated diolefin and monovinyl aromatic hydrocarbon and having a content of monovinyl aromatic hydrocarbon bond of not more than 10% by weight and (B) a copolymer segment obtained by copolymerization of conjugated diolefin and monovinyl aromatic hydrocarbon and having a content of monovinyl aromatic hydrocarbon bond of 15-50% by weight.

Abstract: Blends of epihalohydrin polymers and lower polyolefins containing an acid acceptor, an unsaturated polyfunctional acrylate or methacrylate, and a coagent that is cured with an organic peroxide provide low vicosity, improved hardness, easy processing, and improved physical properties on curing.

Abstract: This invention relates to a reactive plastisol dispersion comprising(1) a polyvinyl acetal thermoplast in particle form;(2) a liquid plasticizer member of the group consisting of(a) at least one an ethylenically unsaturated monomer, oligomer or prepolymer of the formula: ##STR1## wherein R is H or CH.sub.3, R.sub.1 is an organic moiety and n is 1 or more,(b) at least one unsaturated polyester containing the group: ##STR2## wherein R.sub.2 and R.sub.3 are organic moieties, x is 0-20 and y is 1-20; and(c) a mixture of (a) and (b);and, optionally, either(3) a free radical thermal initiator or(4) a photoinitiator for crosslinking.The reactive plastisol dispersion when fluxed can be useful as a sealant or adhesive.

Abstract: A process for crosslinking with peroxides using triallyl citrates as activators and co-agents.

Abstract: A hot melt pressure-sensitive adhesive is provided which is selected to exhibit critical rheological properties which manifest themselves into the desired performance criteria of tenacious bonding and clean release.

Abstract: An ether imide of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and D are as defined in the specification produced by reacting a diamine with an ethylenically unsaturated dicarboxylic acid can give a composition together with one or more unsaturated polyesters, epoxy compounds, amines, and the like to give shaped articles excellent in flexibility and heat resistance.

Abstract: The invention relates to a process for flexibilizing epoxide resins by the addition of polymers which contain carboxyl groups by adding to the epoxide resins before they are cured, copolymers which are obtained by the conventional polymerization of:(a.sub.1) 40 to 87 weight percent of one or several alkyl esters of acrylic and/or methacrylic acid with 1 to 8 carbon atoms in the alkyl radical,(a.sub.2) 10 to 40 weight percent of vinyl acetate and/or acrylonitrile,(a.sub.3) 1 to 20 weight percent of acrylic, methacrylic and/or itaconic acid,(a.sub.4) 1 to 5 weight percent of glycidyl acrylate and/or glycidyl methacrylate, and(a.sub.5) 0 to 35 weight percent of acrylic and/or vinyl monomers, which are different from the monomers a.sub.1 to a.sub.

Abstract: Catalytically self-cross-linking resinous binders are prepared by (a) addition reaction of a primary amine to a beta-hydroxyalkyl ester of an alpha, beta-ethylenically unsaturated acid, and (b) reaction of this secondary amine adduct, optionally in combination with other amines, with an epoxy resin. Curing catalysts are transesterification-promoting metal compounds. Protonized binders can be used in a cathodic electrodeposition bath.

Abstract: A process of coating a particulate medicinal agent; comprising the application to said medicinal agent of a liquid composition containing a water-insoluble film-forming agent, a lipophilic solvent, a hydrophilic solvent and water, said liquid composition comprising an emulsion with at least two phases, wherein the liquid components of the liquid composition are removed after application of said liquid composition to said particulate medicinal agent.

Abstract: Aminoplast resin compositions formed by reaction of an amino-aldehyde precursor in the presence of a cationic surfactant and a hydrocarbon product consisting essentially of components having average carbon chain lengths of about 12 or higher are provided. The aminoplast resin compositions have particular applicability as softening agents for paper and other cellulosic products.

Abstract: A novel acrylic thermoplastic resin composition, transparent and excellent in flexibility, consisting of at least two different multi-layer structure polymers. Polymer [I] contains an inner layer of crosslinked acrylic elastomer and an outer layer of acrylic resin, wherein the amount of elastomeric inner layer is minor in comparison with the amount of the resin outer layer; polymer [II] has the same fundamental polymer structure as multi-layer structure polymer [I] except that the amount of crosslinked elastomer inner layer is a major amount as compared to the amount of resin outer layer. It is preferred that an intermediate layer having an intermediate property exist between the inner and outer layers of the multi-layer structure polymers.

Abstract: Adhesive compositions are described which consist of an adhesive base as a first part and an initiator portion as a second part, said first part consisting essentially of (a) 100 parts by weight of a polymerizable monomer having at least one .alpha.,.beta.-unsaturated carboxyl functionality; (b) as an accelerator, about 0.05 to 20 parts by weight of a compound selected from the group consisting of organic sulfimides and perfluoroalkylsulfonanilides; and (c) an inhibitor of free-radical polymerization; and the second part comprising a condensation reaction product of an aldehyde and a primary or secondary amine. These compositions may be formulated as adhesives which, for example, exhibit pressure-sensitive properties, which are particularly suitable in hot-melt applications, or which are particularly suitable as structural adhesives. Bonding methods are also described herein.

Abstract: Pourable, tack-free vinyl chloride graft polymers based on ethylene-vinyl acetate copolymers and vinyl chloride, having more than 30% by weight of ethylene-vinyl acetate copolymer content, are prepared by thermally precipitating small amounts (0.5-10 wt. %) of polyvinyl chloride in the form of a latex onto the graft polymer.

Abstract: Under particular conditions, a cationic ring-opening polymerization of an (single) oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-terminated prepolymer ("HTP") and a particular catalyst, produces a polymerization having `living polymerization` characteristics, provided the OH groups are aliphatic OH groups and not aromatic OH groups. The result is an AB or ABA type block copolymer the molecular weight (mol wt) of which is directly proportional to the conversion of the monomer to the block copolymer. The HTP which may be a mono-, di-, tri-, or tetra-hydroxyl-terminated prepolymer, serves as a chain propagator which initially furnishes OH groups as propagation sites. Linear block copolymers or branched block copolymers are formed, depending upon the structure of the HTP. Where one segment of an AB or ABA type block contains halogen, the segment may be aminated.