Low density cellular polyvinyl chloride
US4454250A · kind A · utility
5Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1983 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Jun 27, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2351/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A blend is provided which is suitable for preparing low density cellular products of the closed cell type, said blend comprising a vinyl chloride resin, e.g., polyvinyl chloride; a butadiene rubber, e.g., butadiene-acrylonitrile; and a liquid polyfunctional or monofunctional monomer, e.g., styrene. Insulation products such as sheets or tubes (for pipe insulation) are easily fabricated by freely expanding (i.e., without employing forming molds) blends of the invention which contain heat-activatable blowing agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.