Abstract: A shelf-stable polymer-producing coating powder composition is presented comprised of a cyclic nitrile compound and an organic compound containing at least two carboxyl or carboxylic acid anhydride groups or at least one carboxyl group and one carboxylic anhydride group, and a condensation-rearrangement catalyst. The preferred cyclic nitrile compounds are the cyclic nitrile carbonates, for example, adipodi(nitrile carbonate), and the preferred organic compounds are anhydride-containing polymers, for example, styrene-maleic anhydride copolymer. The coating powder composition preferably has a particle size of about 50 to 250 microns.

Abstract: Ethylene-carbon monoxide copolymer compositions are stabilized against thermal degradation by the incorporation therein of substituted 2-(2'-hydroxyphenyl)-benzotriazoles.

Abstract: Microcellular urethane foams are prepared by causing the in situ formation of a urethane polymer from a cyclic nitrile carbonate and a polyol in a matrix of a thermoplastic polymer, preferably a thermoplastic polyurethane. The composition is preferably prepared by mixing the reactant ingredients in the dry powdered state and subsequently heating them in a closed container in the shape of the desired article. The amount of ingredients selected is that which will produce a molded article of the desired density.