Patent ID: 9387654
Filing Date: 2016-07-12
CPC Classification: A43B,B29C,B29D,B32B,C08G,C08J,C09D,C09J

Claim Text:
1. A method of joining elements made of foamed copolymer of ethylene and vinyl acetate with polyurethane wherein surfaces of an element being joined made of foamed copolymer of ethylene and vinyl acetate are prepared by mechanical grinding of the surfaces and by degreasing, characterised in that the surfaces of the element made of foamed copolymer of ethylene and vinyl acetate are kept at the temperature of 45-55° C. and then 2-butanol activator is applied which is cured with ultraviolet rays and subsequently a mixture of polyol, stabilizers and fire protection agent and a mixture of additives and 4,4′-methylene diphenyl diisocyanate/4,4′-diphenylmethane diisocyanate plastic is heated for 10-12 hours with the mixture of polyol, stabilizers and fire protection agent being heated to 70-80° C. and combined with a catalyst and the mixture of additives and 4,4′-methylene diphenyl diisocyanate/4,4′-diphenylmethane diisocyanate plastic being heated to 65-75° C.; the mixture of polyol, stabilizers and fire protection agent, the catalyst, and the mixture of additives and 4,4′-methylene diphenyl diisocyanate/4,4′-diphenylmethane diisocyanate plastic are then mixed and applied on the surface of the copolymer of ethylene and vinyl acetate element; next, polyurethane adhesive is applied on the surfaces being joined and the element prepared in this way is placed in a mould and poured with the mixture of polyol, stabilizers and fire protection agent a mixture of catalyst, additives, ethane-1,2-diol/ethylene glycol with the temperature of 51° C. and the mixture of additives and 4,4′-methylene diphenyl diisocyanate/4,4′-diphenylmethane diisocyanate plastic with the temperature of 43° C. and formed for 240 seconds.