摘要:
Molded fiber-reinforced thermoplastic articles are prepared by a novel two-step process involving an in situ polymerization of monomers onto the fiber followed by compression molding of the product.
摘要:
Semipermeable membranes useful for separating mixtures of ethanol and water into enriched fractions of each are prepared by cross-linking 50-90 weight percent of at least one polymer containing pendent, adjacent carboxy groups with 10-50 weight percent of at least one diamine. Membranes prepared from copolymers of maleic anhydride and styrene cross-linked with a polyoxyalkylene diamine are exemplary. These membranes are also useful in gas separation processes, such as separating oxygen from nitrogen.
摘要:
A protective coating which is resistant to attack by basic solutions is formed from interpolymers containing maleic anhydride (MAH). An article is coated with a solution of the dissolved ammonium or amine salts of the MAH interpolymer, or if the article itself contains MAH the salts may alternatively be formed on the surface of the article by applying a basic solution containing the ammonium or amine ions. The article is then dried and heated at a temperature sufficient to form the cyclic imide structure from the ammonium or amine salt of the MAH, typically about 160 to 200.degree. C.
摘要:
Polymeric compositions having high softening temperatures, good gas barrier properties and low creep properties are composed of an olefinically unsaturated nitrile, another monovinyl component and maleic anhydride and optionally a diene monomer.
摘要:
Polymers which are water swellable in the form of their salts are prepared by polymerization of a monomeric mixture of maleic anhydride, indene and a cross-linking monomer containing a plurality of CH.sub.2 .dbd.C
摘要:
Polymeric compositions having high softening temperatures, good gas barrier properties and low creep properties are composed of an olefinically unsaturated nitrile, another monovinyl component and maleic anhydride and optionally a diene monomer.
摘要:
Blends of high-acrylonitrile thermoplastic copolymers with acrylonitrile-indene copolymers have improved softening temperatures, improved gas barrier properties and other improved physical properties.
摘要:
Polymeric compositions having high softening temperatures, good gas barrier properties and low creep properties are composed of an olefinically unsaturated nitrile, another monovinyl component and maleic anhydride and optionally a diene monomer.
摘要:
Blends of high-acrylonitrile thermoplastic copolymers with acrylonitrile-indene copolymers have improved softening temperatures, improved gas barrier properties and other improved physical properties.
摘要:
A composition comprising an intimate admixture of(a) 50 to 98 parts by weight of chlorinated poly(vinyl chloride) and(b) 50 to 2 parts by weight of an addition tetrapolymer containing the following monomers combined in the polymer structure in the following weight percentages:______________________________________ Weight Percent______________________________________Acrylonitrile 15-35Methyl methacrylate 5-45Indene 5-45.alpha.-methylstyrene or 5-45styrene or amixture of both______________________________________Where (a) plus (b) total 100 parts by weight, and the total parts by weight of combined indene plus .alpha.-methyl styrene plus styrene in the tetrapolymer (b) is 38-70 parts by weight.