Abstract: Copolymers of vinyl esters and crotonic acid are commonly prepared by polymerizing the monomers in bulk or in solution by means of a radical-forming initiator in the presence of a regulator. The polymers should be free from residual monomers and impurities as far as possible. This may be realized in that upon completion of the polymerization the unreacted monomers and other volatile impurities are removed from the reaction mixture by distillation. For this purpose, the use of an entrainer is advantageous. The copolymers are suitable as starting materials for adhesives and hair lacquers, hair setting lotions as well as hair sprays.

Abstract: This disclosure is directed to polymer membranes to be used in electrochemical cells and improved processes for producing the same. The membranes are produced by radiation grafting techniques. The improved process includes the grafting of a hydrophilic monomer, such as methacrylic acid in a chlorinated organic solvent onto an inert base film such as polyethylene. The process also includes but is not limited to the use of inhibitors to limit homopolymerization of a grafting material, as well as emulsifying agents to lower the electrolytic resistance of the finished membrane.

Abstract: The use of a sequential and controlled addition of monomers during grafting to produce grafted elastomers results in blends of the grafted elastomer and a resinuous copolymer which have superior optical properties.

Abstract: Rubber-reinforced alkenyl aromatic resinous polymers are prepared by polymerizing an alkenyl aromatic monomer such as styrene containing a reinforcing rubber until phase inversion occurs and subsequently adding an additional solution containing a reinforcing polymer such as rubber and containing polymerization.

Abstract: By block-copolymerizing a mixture of an aromatic vinyl compound and a conjugated diene in two stages in an aliphatic hydrocarbon solvent, using an organomonolithium compound or an organodilithium compound as a polymerization initiator, a block copolymer is formed as a suspension polymer in a slurry state.The resulting block copolymer is very clear and excellent in mechanical properties, especially, strength, elongation and impact strength. It has a wide application in the field of general resins.

Abstract: A process is, herein, disclosed for preparing a membrane used for prevention of short-circuiting between the anode and the cathode of a battery comprising contacting a polyethylene film with an aqueous solution of acrylic acid, water, ethylene dichloride and ferrous salt or cupric salt and irradiating with ionizing radiation to obtain a polyethylene film with acrylic acid molecules grafted uniformly thereon.

Abstract: This invention relates to a thermosetting, substrate-free, storage-resistant synthetic resin foil which is hard, scratch- and abrasion-proof in the hardened state, comprising: (a) about 60 to 95% by weight of a hardenable polyester resin, (b) about 1 to 15% by weight of a cross-linking agent for the polyester resin, (c) about 5 to 40% by weight of a thermoplastic containing predominantly linear, high-molecular weight reactive groups, (d) about 1 to 15% by weight of a monomer with at least one polymerizable double bond and at least one group reactable with the reactive group of the thermoplastic under the conditions of reaction, (e) and at least one hardening catalyst, and optionally dyestuffs, pigments and/or fillers. The invention also relates to a process for preparing the novel foil of the invention.