Use of polytetrafluoroethylene resins as a nucleating agent for foam molded thermoplastics
US5314925A · kind A · utility
27Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Dec 3, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/908
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing structural aromatic polycarbonate thermoplastic foam is provided which involves gas expansion of a melted aromatic polycarbonate thermoplastic resin composition containing an amount of a polytetrafluoroethylene nucleating agent. The thermoplastic resin compositions provided exhibit an improved uniformity of cell structure in the resultant structural thermoplastic foam as a result of the incorporation of the polytetrafluoroethylene nucleating agent. The process and compositions are useful in the production of structural thermoplastic foam articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.