heisshaertende adhesives based on hydroxyl groups enthaltendem polybutadiene.

摘要

Heat-cured adhesives (I) based on OH gp.-contg. polybutadiene contain polybutadiene of mol. wt. 1000-3500 and OH no. 20-100 (II), masked di-isocyanates (III), sulphur, conventional accelerators and, opt., conventional, esp. mineral fillers, pigments, etc. (II) is an OH-termianted polybudadiene; ratio (II):(III) corresp. to OH:NCO ratio of 1:1.1 to 1:0.1, pref. 1:0.9 to 1:0.1; (III) is based on TDI, MPDI, HMDI, etc, (16 di-isocyanates listed), masked with gps. derived from prim. alcohols, phenols, epsilon-caprolactam, Et acetoacetate, Et malonate, acetylacetone, phthalimide, imidzole, HCl and HCN; pref. (III) is isophorone di-isocyanate (IPDI) mask with caprolactam; (I) contain 5-30 pts. wt. sulphur and accelerator and 100-400 pts. wt. fillers, pigments, etc. per 100 pts. wt (II); wt. ratio S:accelerator is from 1:0.8 to 1:1.2.