Abstract: Disintegration type, crosslinked acrylic resin particles having an average grain diameter of 0.01 to 250 .mu. and containing metal ester bond bearing crosslinks uniformly distributed within the particle bodies are provided in spherical form by the polymerization of 5 to 98% by weight of at least one metal ester bond bearing multifunctional polymerizable monomer and 95 to 2% by weight of at least one other polymerizable monomer. The instant resin particles are specifically useful as resinous filler in an antifouling paint and other compositions.

Abstract: A spinning solution for acrylonitrile polymers is disclosed, which has a viscosity of 30 to 520 poises (at 50.degree. C.) and which comprises an acrylonitrile polymer having a reduced viscosity of not less than 4.0, a solvent, and water, wherein the water concentration and the polymer concentration fall within the range in the drawing surrounded by straight lines connecting point A (1 wt % and 30 wt % respectively), point B (1 wt % and 10 wt % respectively), and point C (10 wt % and 10 wt % respectively). The spinning solution exhibits satisfactory spinnability in spite of its high polymer concentration and provides void-free acrylonitrile fibers having a highly circular cross-section and excellent mechanical strength.

Abstract: A process for the polymerization of acrylic monomers and optionally of vinyl comonomers using (i) an initiator of formula (I):R--M (I)in which M denotes a metal selected from the group consisting of alkali metals and alkaline earth metals and R denotes a straight-chain or branched alkyl radical containing 2 to 6 carbon atoms or an aryl radical, and (ii) at least one non-nitrogenous macrocyclic complexing agent.The polymerization process is used to make products of acrylic polymers having a narrow distribution of molecular masses.

Abstract: In a family of side-chain homopolymers of the polyacrylate type derived from 1-(phenyl)-2-(4-cyanophenyl)-ethane and exhibiting one or a number of mesophases, the polymer in accordance with the invention corresponds to the following general chemicals formula: ##STR1## where x indicates the degree of polymerization and 2.ltoreq.n.ltoreq.15.

Abstract: A resinous composition comprising an acrylic resin having end carboxyl bearing long pendant groups of the formula: ##STR1## wherein R.sub.2 is a substituted or unsubstituted aliphatic hydrocarbon having 2 to 10 carbon atoms, alicyclic hydrocarbon having 6 to 7 carbon atoms or aromatic hydrocarbon having 6 carbon atoms; A is a repeating unit of ##STR2## R.sub.3 is ethylene or propylene; R.sub.4 is a substituted or unsubstituted alkylene having 2 to 7 carbon atoms; R.sub.5 is a substituted or unsubstituted alkylene having 2 to 5 carbon atoms; m is an integer of 1 to 10; and n is an integer of 2 to 50.

Abstract: The amine resistance of peroxide-cured fluorocarbon elastomers is improved by dispersing certain normally solid, inorganic chloride or bromide salts in the elastomer gum formulation.

Abstract: Capsule-shaped polymer particles and a process for the production thereof are described. In one embodiment of the process, a polymerizable monomer component containing a cross-linkable monomer and a hydrophilic monomer, and an oily substance are finely dispersed in water to prepare an oil-in-water emulsion and then the polymerizable monomer component is polymerized, whereupon capsule-shaped polymer particles containing the oily substance as a core material are obtained. Upon removal of the oily substance in the particles, there are obtained capsule-shaped hollow polymer particles. These capsule-shaped polymer particle are excellent in such properties as mechanical strength and heat resistance, and thus can find many applications.

Abstract: A method of manufacturing pulverulent polymaleic anhydrides in which maleic anhydride is polymerized in an organic solvent in the presence of a dispersant. Polymerization results in high yields of polymaleic anhydride, as a colorless or faintly colored powder.

Abstract: The flow properties of styrenic polymer resins derived from at least one monovinylidene aromatic compound and, optionally, other copolymerizable monomers, are improved by copolymerizing from 0.1 to 15 weight percent of an ester of acrylic acid, e.g., n-butylacrylate, with the monovinylidene aromatic compound and any other copolymerizable monomers employed in preparing the styrenic polymer resin.

Abstract: An acidic water-based film-forming coating composition suitable for the protection of ferrous surfaces by application thereto and drying at ambient temperature wherein said composition contains at least one acid of defined formula, such as lactic or tartaric acid, which prevents or reduces general yellow/brown staining.

Abstract: Coating compositions comprising (a) free-radical polymerizable compound, (b) metal drier reversibly inhibited to catalyzing free-radical polymerization by a fugitive acid and (c) an allyloxy compound exhibiting long pot life and rapid cure, e.g. at elevated temperature, to hard, tough coatings.

Abstract: The rubber composition of the present invention comprises rubbers and halogen compounds. As the rubbers, vulcanized or unvulcanized rubbers are employed. The vulcanized rubber compositions are obtained by applying unvulcanized rubbers together with the halogen compounds, vulcanizing agents and vulcanization accelerators to subjects to be coated and then heating them. These rubber compositions all exhibit a strong adhesive force to various rubbers and therefore, they are useful as adhesives or subbing agents for various rubbers including vulcanized polyolefin rubbers.

Abstract: Group transfer polymerization process with respect to which a selected silylamine is employed, for example, as a scavenger to remove scavenger-reactive poisons.

Abstract: An elastomeric fluoropolymer comprising 12 to 50% by mole of repeating units derived from a perfluorovinyl ether of the formula:CF.sub.2 .dbd.CFO--(CF.sub.2 CFXO).sub.m --R.sub.f (I)wherein R.sub.f is a C.sub.1 -C.sub.6 perfluoroalkyl group, X is a fluorine atom or a trifluoromethyl group and m is an integer of 1 to 5, 50 to 88% by mole of repeating units derived from tetrafluoroethylene and 0.1 to 5% by mole of repeating units of hexafluoropropylene having improved strength and compression set.

Abstract: Compositions of copolymers are disclosed containing 10 to 35% by weight of units derived from at least one vinylaromatic monomer, 5 to 15% by weight of units derived from at least one linear or branched alkyl methacrylate with 1 to 4 carbon atoms, 20 to 50% by weight of units derived from at least one linear alkyl methacrylate with 8 to 14 carbon atoms and 15 to 50% by weight of units derived from at least one linear alkyl methacrylate with 16 to 22 carbon atoms. The copolymer compositions have a weight average molecular weight of 100,000 to 400,000 and a polydispersity index in general of less than 5.They are prepared by any free-radical copolymerization method using for example azo or peroxide initiators.These compositions have the advantage of providing a better compromise between the characteristics required of a viscosity additive for lubricating oils.

Abstract: This invention relates to terpolymers of chlorotrifluoroethylene, ethylene and perfluoroalkoxyperfluoroalkyl ethylene which have improved resistance to thermal stress cracking and improved high temperature properties.

Abstract: The composition comprises a cationic free, functional emulsion polymer mixture adapted to be coreacted with glycoluril. The process comprises copolymerizing ethylenically unsaturated monomers, including functional monomers but excluding amine monomers, in an aqueous polymerization medium. The resulting polymers are useful in surface coating application generally as well as specifically for wood substrates.

Abstract: A metal container coating composition comprising a crosslinking resin and an aqueous polyvinyl alcohol/vinyl chloride-ethylene copolymer emulsion, the copolymer having a Tg from 0.degree. to 50.degree. C., about 65 to 90 wt % vinyl chloride, about 5 to 35 wt % ethylene, 0 to 10 wt % olefinically unsaturated copolymerizable monomer and prepared by emulsion polymerization of vinyl chloride, ethylene and, optionally, an olefinically unsaturated comonomer in the presence of 3 to 15 wt % polyvinyl alcohol as the dispersing agent.

Abstract: An oriented thermoplastic elastomer comprising an elastomer, EVA, and process oil is prepared by stretch orienting the film at an elevated temperature and annealing the film to freeze in stresses and strains in the film. In one embodiment, the thermoplastic elastomer is provided with a thin coating of a thermoplastic to provide nonblocking.

Abstract: A polymerization process, especially a solution polymerization process, for the preparation of high molecular weight polymers of alpha-olefins less susceptible to yellowness is disclosed. The process comprises feeding monomer(s), coordination catalyst and optionally inert hydrocarbon solvent to a reactor, polymerizing the monomers at a temperature of up to 320.degree. C. and deactivating the catalyst. An organozirconium compound is admixed with the polymer thus obtained. The organozirconium compound is of the formula ZrO.sub.m (OCOR').sub.n (OR").sub.p-n where R' and R" are independently selected from the group consisting of alkyl and cycloalkyl having 1-20 carbon atoms, and m=0 or 1, provided that when m=0, p is 4 and n is 0-4, and when m=1, p is 2 and n=0-2. Any hydrocarbon solvent and other volatile matter are then separated and a composition comprising said high molecular weight polymer is recovered.