Sequential process of preparing polyurethane elastomers
Abstract
Abstract POLYURETHANE ELASTOMERS PRODUCED BY INCORPORATING NORMALLY SOLID LINEAR URETHANE POLYMERS IN A BLEND OF LIQUID LINEAR AND BRANCHED ISOCYANATE-TERMINATED ADDUCTS AND CURING THIS COMPOSITION TO FORM A SOLID ELASTOMER BY INCORPORATION OF A CURING AGENT. THE NORMALLY SOLID LINEAR URETHANE POLYMERS ARE PREPARED BY REACTING LINEAR ORGANIC COMPOUNDS HAVING AT LEAST 1 ACTIVE HYDROGEN ATOM AND AN AVERAGE EQUIVALENT WEIGHT OF ABOUT 31 TO 400 WITH ISOCYANATE IN THE BLEND OF LIQUID ADDUCTS. THE BLEND OF LIQUID ISOCYANATE-TERMINATED ADDUCTS IS PREPARED BY REACTION OF ORGANIC ISOCYANATE WITH A LINEAR ALCOHOL HAVING 2-HYDROXYL GROUPS AND AN AVERAGE EQUIVALENT WEIGHT OF ABOUT 500 TO 1500 AND A BRANCHED CHAIN ALCOHOL HAVING MORE THAN 2 HYDROXYL GROUPS AND AN EQUIVALENT WEIGHT OF ABOUT 45 TO 2500.
Inventors
- 👤 Adolfas Damusis
Bibliographic Details
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