Foamable polyester compositions having a low level of unreacted branching agent
US5696176A · kind A · utility
141Cited by
12References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Sep 22, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for preparing foamable branched polyester compositions having increased melt viscosity and melt strength, and a reduced level of unreacted monomeric branching agent. The process involves melt blending (A) a composition containing a polyolefin and branching agent, (B) a nucleating agent either in powder form or (B') in the form of a composition containing a polyolefin and nucleating agent, and a polyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.