Alcohol control of lightly crosslinked foamed polymer production
US4694025A · kind A · utility
61Cited by
11References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 16, 1984 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Nov 16, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An expandable ethylenic or styrenic polymer composition for production of lightly crosslinked foamed polymers and a process for controlling the degree of crosslinking of the polymer prior to extrusion foaming. The control is obtained by use of (a) a reversible gas-yielding crosslinking reaction which is delayed in the foam extrusion line in the presence of gaseous products (alcohols) and (b) added amounts of an alcohol such as an aliphatic alcohol. Suitable crosslinking agents include silanes, azido functional silanes, titanates, and amino compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.