Production of foam
US4456704A · kind A · utility
54Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Oct 8, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing cross-linked polyethylene resin foams which comprises mixing a polyolefin resin, a blowing agent and, optionally, a surface active agent containing hydroxyl groups or an acid amide compound under pressure, said polyolefin resin containing a cross-linkable ethylene polymer having on the side chains thereof silyl groups which effect cross-linking upon contact with water; extruding the mixture into a low pressure zone where the extrudate is allowed to expand; and bringing the expanded extrudate into contact with a silanol condensing catalyst so that the expanded extrudate is cross-linked on contact with water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.