Abstract: The present invention relates to an impact resistant polymeric composition comprising a polyarylene sulfide, a thermally stable modified selectively hydrogenated high 1,2 content block copolymer wherein at least one graftable functional molecule is grafted to the block copolymer in the vinylarene block and a silane.

Abstract: Acetal copolymers of trioxane with epoxy functional groups are obtained by copolymerizing trioxane with 5,6-epoxy-1,3-dioxepane. The epoxide group in the polymer chain provides a highly reacting functional group for further modification. Acetal copolymers with backbone epoxide groups exhibit toughness and thermal stability. The backbone epoxide groups can also be aminated in a one step hydrolysis-amination process.

Abstract: Cationic copolymerization of trioxane with glycidyl ester derivatives, preferably glycidyl acrylate derivatives, produces thermally stable, usually cross-linked, acetal copolymer. The resulting acetal copolymer will exhibit side chain ester functionality, and particularly side chain vinyl functionality when glycidyl acrylate derivatives are employed, so as to permit its futher reaction with other chemical moieties to achieve an acetal copolymer of modified chemical and/or physical properties.

Abstract: Cationic polymerization of trioxane and a mixture of ester derivatives of .alpha.,.alpha.- and .alpha.,.beta.-isomers of glycerol formal yields acetal terpolymers having pendant functional groups (i.e., ester groups, or hydroxyl groups obtained by hydrolyzing ester groups, pendent from the polymer's backbone). The glycerol formal monomers employed in this invention may include functional groups selected from ester moieties which are protected from, and thus survive, the polymerization process with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block polymers and/or to chemically bind modifiers to the acetal terpolymer backbone, for example.

Abstract: The invention concerns a method for producing an acetal copolymer containing backbone bromo-functional groups comprising copolymerizing trioxane with 5,6,-dibromo-1,3-dioxepene. The invention also concerns methods of modifying acetal copolymers containing bromo-functional groups and the copolymers produced by the methods of the invention.

Abstract: Acetal copolymers of trioxane and 1,3-dioxep-5-ene having a high degree of crystallinity and specific mole percent incorporations of 1,3-dioxep-5-ene are synthesized.The invention also provides a process for producing highly crystalline acetal copolymers by copolymerizing triozane and 1,3-dioxep-5-ene and precipitating the copolymer product from solution.The copolymers show much improved stability against halogen degradation.

Abstract: The black speck formation which occurs during the compounding and molding of admixtures of oxymethylene polymers and polyamides having a melting or softening point below that of the oxymethylene polymer can be reduced by adding the polyamide to the oxymethylene polymer as a dispersion of the polyamide in a carrier resin which is inert to the oxymethylene polymer and has a melting or softening point below that of the oxymethylene polymer. The polyamide comprises less than about 50 weight percent of the dispersion.