Modifiers for PVC foam, process for extruding modified PVC foam and modified PVC foam compositions
US4120833A · kind A · utility
12Cited by
20References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
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.