ADHESIVE POLYURETHANE COMPOSITION Russian patent published in 1995 - IPC

FIELD: adhesive compositions. SUBSTANCE: the invention makes it possible to improve the stability of the properties of an urethane elastomer solution and the adhesive power of sized layers. The adhesion strength is improved due to using an urethane elastomer having a molecular weight of 90,000-180,000 which is prepared from a mixture of poly-1,4-hicyleneglycol adipinate having a molecular weight of 2000 and trifunctional polyether having a molecular weight of 1500-2500 selected from polyoxypropylene triol, polyoxypropylene glycol glycerol adipinate and polybutylene glycol glycerol adipinate in a 100 (0.5-5.0) and toluylene diisocyanate weight ratio at a polyether to isocyanate molar ratio of 1.0:(1.01-1.04), the proportions of the ingredients in the adhesive composition being as follows (wt parts): 100 said urethane elastomer; 1-75 isocyanate component; and 400+-15 organic solvent. EFFECT: improved properties of the adhesive composition. 2 tbl