Abstract: The evolution of smoke and the development of flame are retarded by the incorporation of hydrated magnesium oxychloride into organic polymers which contain aromatic components, particularly polymers and copolymers of styrene. The hydrated magnesium oxychloride has the added advantage that it has low tinting strength, i.e., does not greatly change the color or appearance of the polymers.

Abstract: A first charge of 10 to 100 parts by weight of scrap vulcanized rubber is added to 100 parts by weight of a hydrocarbon solvent, and the resultant mixture is heated at 400.degree. to 700.degree. F. until the rubber is solubilized. At least one additional charge of scrap rubber is made to increase the percentage of rubber in the mixture to at least 60% by weight and the heating is continued until all the rubber is solubilized. The product is incorporated into new rubber articles.

Abstract: The addition of Manganese borate (Mn B.sub.4 O.sub.7) to flexible vinyl chloride resin compositions greatly reduces the evolution of smoke when the compositions undergo combustion processes.

Abstract: It is known that polyurethane hydrolyzes in superheated steam.The oily hydrolyzate from a polyurethane derived from a polyether diol is filtered and stripped to remove the water and remove any unhydrolyzed water-insoluble polymer such as vulcanized rubber, etc. that may be present. There may be a substantial amount of scrap rubber present in the scrap polyurethane that is treated, such as the scrap from a plant producing rubber and plastic products, or scrap articles that may include rubber and polyurethane, such as mats, cushions, automobile parts, solid and pneumatic tires, etc., or scrap which contains old rubber and polyurethane products such as an accululation of scrap rubber tires and polyurethane tires, etc.

Abstract: The incorporation of a metal salt of a fatty acid and/or organic sulfonic acid into a polybutadiene resin greatly enhances the resistance thereof to thermoxidative deterioration.

Abstract: The invention relates to the process for recovery of carbon black of controlled quality from scrap-rubber vulcanizates. Scrap rubber is selected on the basis of the quality of the carbon black used in the preparation of the rubber from which the scrap is obtained. The scrap is continuously pyrolized to produce a product composed largely of the carbon black originally present in the scrap. The recovered carbon black is ground and may be used as a reinforcing agent as such, or optionally it may be pelletized to facilitate handling.

Abstract: Aluminum oxide trihydrate and zinc oxide function synergistically in reducing the flammability of polyvinyl chloride and in reducing the maximum smoke intensity generated in the combustion of the aluminum oxide trihydrate, zinc oxide, polyvinyl chloride combination.

Abstract: The adhesive properties of compositions which contain an organic isocyanate, with or without a film-former, are improved by the inclusion of nitrosyl halide adducts of unsaturated compounds which act as adhesive promoters. The compositions are useful for adhering natural and synthetic polymeric elastomers, and are particularly useful in the production of laminations formed from polyurethane polymers and other substrates including metals, etc. and especially the formation of laminations from the cured tread of a conventional rubber to a curable polyurethane prepolymer composition which can be formed in the shape of a tire body.

Abstract: a hot-melt adhesive is shown which contains 75 to 99 parts by weight of depolymerized scrap rubber. From 1 to 25 parts by weight of an additive are included. The additive can include an elastomer, a resin, or a filler, or any combination thereof. The depolymerized scrap rubber is produced by heating solid scrap rubber in contact with a hydrocarbon liquid at 400.degree. to 800.degree. F. for 0.1 to 50 hours.In use, the adhesive is heated and combined with two or more wood elements. When the combination cools, a composite wood structure is obtained.