Lightly crosslinked linear olefinic polymer foams and process for making
US4714716A · kind A · utility
90Cited by
16References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1984 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Nov 16, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/0014
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A substantially closed-celled linear polyolefin foam is made by melt processing under pressure a linear polyolefin together with a volatile blowing agent and a crosslinking agent and then expanding the polymer. Suitable crosslinking agents, including azido and vinyl functional silanes, organic peroxides, multifunctional vinyl monomers, and oxygen, increase the melt tension and melt viscosity of the polymer by lightly crosslinking the polymer with itself to enable the production of foams having improved properties in comparison with branched polyolefin foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.