Patent ID: 6472475
Filing Date: 2002-10-29
Classification: C08J,C08K,C08L,C09J

Abstract:
A liquid or spreadable vulcanizable rubber mixture based on more than one polymer of which at least one polymer is olefinically unsaturated, wherein said mixture comprises(a) from about 30 to about 70 parts by weight of a polymer A containing on average at least two hydroxyl groups per macromolecule; (b) from about 70 to about 30 parts by weight of a polymer B compatible with A and containing on average at least two carboxylic acid and/or carboxylic anhydride groups or at least one carboxylic acid and one carboxylic anhydride group per molecule; (c) from about 10 to about 120 parts by weight of vulcanization auxiliary components; and, optionally, (d) from about 0.1 to about 5 parts by weight of an esterification catalyst; wherein at least one of polymers A and B is vulcanizable under vulcanization conditions at an elevated temperature through its olefinic double bonds, and wherein one of polymers A and B is derived from a vulcanizable polydiene and the other polymer is a compatible polyamide, polyester, or a copolymer containing OH and/or carboxylic acid or carboxylic anhydride groups, or wherein both polymers A and B are derived from polydienes or copolymers thereof.