Process for preparing foamed vinylaromatic polymer products
US5051452A · kind A · utility
5Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Feb 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/907
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Novel polymeric blends comprising from 45-90% by weight of at least one vinylaromatic resinous material, 10-55% by weight of at least one vinylidene chloride polymer and, optionally but preferably, an effective amount of at least one blowing or expansion agent. The invention blends provide products having improved oxygen and water permeability, improved toughness, and improved flammability resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.