Modifiers for PVC foam, process for extruding modified PVC foam and modified PVC foam compositions
US3983296A · kind A · utility
8Cited by
16References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1974 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Mar 22, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A modifier system for extruding PVC foam comprising two separate core-shell polymers, the shells of which are substantially ungrafted to the cores. Also disclosed is an improved process for extruding PVC foam and improved extruded PVC foam composition and articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.