| 摘要 |
<p>1,260,078. Laminates. TAKEDA YAKUHIN KOGYO K.K. 5 Oct., 1970 [6 Oct., 1969], No. 47280/70. Heading B5N. [Also in Division C3] Articles e.g. fabrics, films and sheets, made of polyesters or polyolefins may be adhered to each other or to other substrates with an adhesive composition which comprises per 100 p.b.w. of component (A) from 1 to 30 p.b.w. of component (B), component (A) being a hydroxy-terminated polyurethane prepolymer prepared by reacting a polyester diol of M.W. 500 to 3000 with #, #<SP>1</SP>- diisocyanate dimethyl benzene at an NCO/OH ratio of 1À02 to 1À10 to give an NCO-terminated prepolymer which is then reacted with a polyol of M.W. not higher than 400 and having at least 3 OH groups per molecule at an OH/NCO ratio of 3 to 10 and component (B) being an NCO- terminated prepolymer which is prepared by reacting a polyol of M.W. not higher than 400 and having at least 20 H groups per molecule and an excess amount of #,#<SP>1</SP>-diisocyanato dimethyl benzene, the amounts being such that the NCO/OH ratio is not less than 1À5 (see Division C3). The adhesive composition may be dissolved in a solvent. In specific examples two polyethylene terephthalate films have various adhesive compositions applied to their surfaces and after pre-drying are piled with their adhesive layers in contact with each other. The piled film is heated under pressure to allow curing to take place. Similarly two polypropylene films may be adhered together.</p> |
