Patent ID: 11926722
Assignee: SOLVAY SA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 10:
11. A process for manufacturing a PVC foamed polymer, comprising heating the foamable PVC polymer composition according to claim 8 which comprises the functionalized particulate sodium bicarbonate and the PVC resin at a temperature of at least 130° C. for liberating CO2 gas and melting the PVC polymer during a gelation time from 90 seconds to 120 seconds at a temperature from 190 to 210° C., to provide the foamed PVC polymer, wherein the foamable PVC polymer composition is spread coated on a surface before heating and melting, and wherein the PVC foamed polymer has an expansion ratio of at least 270 to 330%, and/or has a density of less than 0.6 g/cm3.