Flexible polyurethane foam having improved compression set
Abstract
Abstract PROCESS FOR PRODUCING AN IMPROVED UNDISTILLED TOLYLENE DIAMINE PHOSGENATION PRODUCT, HAVING AN AMINE EQUIVALENT OF ABOUT 90-125, BY MIXING TOLYLENE DIAMINE AND PHOSGENE AT AN ELEVATED TEMPERATURE UNTIL THE AMINE IS SUBSTANTIALLY ALL CONVERTED TO ISOCYANATE AND ADJUSTING THE ACIDITY OF SAID UNDISTILLED PHOSGENATION PRODUCT UNTIL THE ACIDITY OF THE UNDISTILLED PRODUCT IS IN THE RANGE OF ABOUT 0.03-0.3 WEIGHT PERCENT. THE PHOSGENATION PRODUCT MAY BE USED EFFECTIVELY AN AN ELEMENT IN A HIGHLY RESILIENT POLYURETHANE FOAM. IT IS PREFERRED TO ADJUST THE ACIDITY OF THE UNDISTILLED PRODUCT BY MAINTAINING SAID PRODUCT IN A PHOSGENATION ATMOSPHERE AT A TEMPERATURE OF ABOUT 100-200*C. FOR AT LEAST ABOUT 0.08 HOUR, PREFERABLY 0.08-2 HOURS.
Inventors
- 👤 C Irwin
- 👤 H Wolfe
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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