Verfahren zur Verbesserung der Gummihaftung auf Reifencord aus Polyaethylenterephthalat

摘要

The bonding of rubber to polyethylene terephthalate tyre cord is improved by applying to the yarn used for the manufacture of the tyre cord a spinning composition which is an oily or waxy finishing preparation or spooling oil, a glycidyl ether of an aliphatic alcohol having at least three-OH groups of which at least two are converted to glycidyl ether groups and a heterocyclic or aliphatic amine and subsequently treating the product with an aqueous dispersion of a resorcinol formaldehyde precondensate and a vinyl pyridine latex. An aqueous-alcoholic solution or aqueous emulsion of the glycidyl ether and amine may be added to an aqueous or benzinic spinning composition containing a vegetable oil or fat and as emulsifer a polyethenoxylated fatty alcohol, fatty acid, fatty acid ester, sorbitol ester or sorbitan or paraffin oil and free fatty acids, and the mixture applied to the freshly spun filaments produced by melt spinning prior to winding or stretching by means of a moistening roller system. Alternatively the aqueous-alcoholic solution or aqueous emulsion of the glycidyl ether and the amine and the spinning composition may be applied immediately one after the other by means of two moistening roller systems. The glycidyl ether may be sorbitol glycidyl ether having 3.5 OH groups epoxidized or trimethylol propane ether and the amine may be piperazine or dicyandiamide.