| 摘要 |
<p>1,186,431. Coated sheet material. TEIJIN Ltd. 2 Feb., 1967 [2 Feb., 1966; 16 May, 1966; 9 Nov., 1966], No. 5155/67. Heading B2E. [Also in Divisions C3 and D1] A process for bonding to rubber a shaped article (suitably a filament, yarn, cord or cord fabric and particularly a tyre cord) made from a crystalline ethylene terephthalate polyester, at least 60 mol % of which is made up of ethylene terephthalate units, or a crystalline ethylene-2, 6-naphthalate polyester, at least 60 mol % of which is made up of ethylene-2, 6-naphthalate units, comprises (1) applying to the article a coating of a .polyester-polyurethane in which the polyester segments (a) constitute 1/6 to 5/6 by weight of the polyesterpolyurethane and (b) are derived from an ethylene terephthalate polyester (as defined above) when the shaped article is of a crystalline ethylene terephthalate polyester and are derived from an ethylene-2, 6-naphthalate polyester (as defined above) when the shaped article is of a crystalline ethylene 2,6-naphthalate ,polyester; (2) heating the coated article at a temperature below the m.p. of the coated article but not below 100‹C; and (3) bonding the resultant article to rubber by a method known per se. The polyesterurethane may be slightly branched or may contain alkali metal sulphonate groups, or tertiary amino groups neutralized with an acid. In Examples, high tenacity polyethylene terephthalate yarns or polyethylene 2,6-naphthalate yarn are immersed in solvent solutions, emulsions or water dispersions of numerous polyester-polyurethanes. After drying and heat treating, suitably at a temperature of 150 to 240‹C, the yarn was treated with a resorcinol formalin latex, heat treated and adhered to natural or synthetic rubbers.</p> |
