Foamable engineering thermoplastic compositions
US4904702A · kind A · utility
11Cited by
10References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1989 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Feb 28, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2201/024
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A foamable composition comprises in admixture (a) a high molecular weight thermoplastic resin in particulate form and an effective amount of (b) a foaming agent therefor comprising a pumpable liquid dispersion comprising (i) a solid blowing agent, (ii) a liquid carrier, and, optionally, (iii) a thickener. The liquid dispersion can be pumped directly into the hopper of a foam molding machine eliminating the need to pre-mix pelletized concentrates of the solid blowing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.