Process for preparing foamed article of vinyl chloride resin containing a large amount of inorganic particles
US4783294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1985 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Jun 13, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing a foamed article of a vinyl chloride resin containing a large amount of inorganic particles, which comprises the steps of preparing a foamable composition of the resin, the inorganic particles and a blowing agent, filling a closable mold with the composition, heating the mold and the composition under pressure, and opening the mold at a temperature of not less than a softening temperature of the resin in the foamable composition. According to the process, a foamed article which has an excellent mechanical property and a high expansion ratio, and produces little calorie, smoke and poison gas can be prepared with reduced energy consumption and in a shortened production time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.