Polyurethane adhesive composition
Abstract
Abstract ADHESIVE COMPOSITION WHICH IS PARTICULARLY USEFUL IN BONDING POLYESTERS OR POLYOLEFINS TO THEMSELVES OR TO OTHER SUBSTRATES COMPRISES PER 100 WEIGHT PARTS OF COMPONENT (A) ABOUT 1 TO ABOUT 30 WEIGHT PARTS OF COMPONENT (B), COMPONENT (A) BEING A HYDROXY TERMINATER POLYURETHANE PREPOLYMER WHICH IS PREPARED BY REACTING A POLYESTER DIOL HAVING A MOLECULAR WEIGHT OF ABOUT 500 TO ABOUT 3000 WITH W,W''-DIISOCYANATO DIMETHYL BENZENE IN SUCH A RATIO THAT NCO/OH IS ABOUT 1/1 TO GIVE AN NCO-TERMINATED PREPOLYMER AND REACTING THE PREPOLYMER WITH A LOW MOLECULAR POLYOL HAVING AT LEAST 3 OH GROUPS PER MOLECULE IN A RATIO SUCH THAT OH/NCO IS ABOUT 3 TO ABOUT 10, AND COMPONENT (B) BEING AN NCO-TERMINATED PREPOLYMER WHICH IS PREPARED BY REACTING A LOW MOLECULAR POLYOL HAVING AT LEAST 2 OH GROUPS PER MOLECULE AND HAVING A MOLECULAR WEIGHT OF LOWER THAN ABOUT 400 WITH AN EXCESS AMOUNT OF W,W''-DIISOCYANATO DIMETHYL BENZENE.
Inventors
- 👤 Seizi Kazama
- 👤 Masamitsu Nakabayashi
Bibliographic Details
Claims Analysis
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