GLUTAMIC ACID POLYMER COATINGS

摘要

1,221,469. Polyamides; polyurethanes. KYOWA HAKKO KOGYO CO. Ltd. 19 Nov., 1968 [22 Nov., 1967], No. 54795/68. Heading C3R. [Also in Division B2] Polyamides for coating on substrates (see Division B2) comprise polymers selected from the homopolymer, copolymer and blends of polymers of glutamic acid gamma-ester(s) with or without one or more other optionally substituted amino acids as constituents of the copolymer or blended polymer. Urethane resin adhesives for the polyamide coatings comprise the reaction product of diisocyanate substituted alkanoic acid esters with a polyol sufficient in amount to provide a NCO/OH ratio of 0À1-10À0. The glutamic acid gamma ester is selected from the optically active or inactive group represented by the formulµ (wherein R 4 , R 5 are selected from the monovalent hydrocarbon groups consisting of a saturated or unsaturated aliphatic hydrocarbon residue having 1 to 20 carbon atoms, saturated or unsaturated cycloaliphatic hydrocarbon residue having 4 to 20 carbon atoms, aromatic hydrocarbon residue having 6 to 20 carbon atoms or any of said groups having as substituent(s) chloro, bromo, fluoro, nitro, cyano (nitrile), alkoxy, carboalkoxy, carboaryloxy, carboalkaryloxy, carboaralkoxy, mono- and di-alkylated amino, acylated amino, carboalkoxy amino, and carboaralkoxy amino). The diisocyanate substituted alkanoic acid esters are of formula (wherein R 1 is selected from unsaturated or saturated alkyl, alkoxyalkyl, cycloalkyl, aryl, alkaryl and aralkyl and the aforementioned types having as substituent(s) chloro, bromo, fluoro, nitro, alkoxy, carboalkoxy, acylamino, dialkylamino, carboalkoxyamino and carboaralkoxyamino, R 2 is selected from alkylene and alkylidene, R 3 is selected from hydrogen and the radical where Y is selected from the group consisting of the same group described for R 1 ). The adhesive can be a moisture cured adhesive in the form of a one-component type or a twocomponent type when used together with a polyol, polyolpolyester, or an acrylic-modified polyol. The amino acid in the blended polymer or copolymer may be glycine, alanine, alphaaminobutyric acid, valine, norvaline, leucine, isoleucine, norleucine, phenylalanine, 0-substituted serine, O-substituted homoserine, O- substituted threonine, S-substituted cysteine, cysteine, methionine, aspartic acid-beta-monoester, alpha-amino adipic acid-monoester, N- substituted histidine, proline, N-substituted ornithine, N-#-substituted lysine, N-guanidosubstituted arginine. Numerous examples of homopolymers, blended polymers and copolymers, and of urethane resin adhesives are given.