Inventors:
John Robert Patterson - Philadelphia PA, US
Scott Warren Reading - Burlington NJ, US
Eugene Patrick Dougherty - Langhorne PA, US
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08L 13/02, C08L 27/04
US Classification:
524 13, 524 16, 524567, 524569
Abstract:
Compositions and processes for preparing extrudable powder blends containing at least one vinyl chloride resin and a cellulosic material are provided. More specifically, compositions and processes for preparing extrudable free-flowing powder blends containing PVC and wood flour (WF) are also provided for preparing foamed or nonfoamed extrudates. The processes provided herein incorporate components which may contain up to a total of 25 weight percent water. Processes for preparing foamed extrudates are also provided wherein a cooling fluid is used to increase the expansion ratio of the foam. Finally provided are composites having an extrudable thermoplastic substrate and at least one capstock layer disposed thereon containing a PVC/WF composition.