Expandable thermoplastic polymer particles and process for producing the same
US4430450A · kind A · utility
4Cited by
2References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1983 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | May 27, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed are expandable thermoplastic polymer particles and process for preparing the same. Expandable thermoplastic polymer particles superior in processability as well as expansion are prepared by controlling an amount of inside moisture contained in said particles coated or impregnated with a blowing agent to not more than 1% by weight based on polymer, immediately after prepared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.