Foamable thermoplastic compositions, foamed articles and foaming method based on pre-compounded nucleating agent-resin concentrate
US4683247A · kind A · utility
20Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1984 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Dec 28, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Foamable thermoplastic compositions are described which are based on pre-compounded concentrated blends of an inorganic non-fibrous particulate foaming agent and a carrier polymer. The foamable thermoplastic polymer is selected from among aromatic polycarbonates alone or with acrylonitrile-butadiene-styrene copolymers polyesters, poly(ester-carbonates), and polyetherimides. The foaming agent may optionally be added as part of the concentrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.