Crystalline 1 2-polybutadiene molding composition
Abstract
Abstract CRYSTALLINE 1,2 BUTADIENE POLYMER IS USED TOGETHER WITH A FREE-RADICAL CURING AGENT TO PRODUCED A MOLDING COMPOSITION. THE POLYBUTADIENE IS IN THE NORMALLY GRANULAR, CRYSTALLINE. LARGELY SYNDIOTACTIC FORM. WHEN MOLDING COMPOSITIONS OF THIS POLYBUTADIENE ARE FORMULATED ON A ROLL MILL, THE COMPOSITIONS ARE GRANULATED. THOSE FORMULATED WITH PEROXY CURING AGENT WILL READILY CURE TO A HEAT DISTORTION TEMPERATURE OF AT LEAST 250*C. EVEN WHEN CONTAINING AN ANTIOXIDANT SERVING TO INHIBIT PREMATURE CURING. CONVENTIONAL INGREDIENTS OF MOLDING COMPOUNDS SUCH AS FILLERS AND MOLD LUBRICANTS CAN BE INCORPORATED WITH THE COMPOSITIONS. THE COMPOSITIONS INCLUDING A PEROXY CURING AGENT AND AN ANTIOXIDANT CAN BE WORKED WITHOUT CURING AT TEMPERATURES ABOVE THE FUSION TEMPERATURE, AND CURED AT HIGHER TEMPERATURES.
Inventors
- 👤 Robert J Schaffhauser
- 👤 Charles D Mason
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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