Injection-moldable polybutylene terephthalate resin compositions and molded articles of the same
US5128399A · kind A · utility
3Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Jul 11, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/103
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polybutylene terephthalate (PBT) injection-molding compositions exhibit improved mold-release properties and sufficient extruder screw "bite" during injection molding. The PBT compositions are a polyblend of a PBT base resin with an effective amount (preferably between about 0.01 to 10 parts by weight) of a processing aid which is a sorbitan ester of a fatty acid having at least 12 carbon atoms. The PBT injection molding compositions of the invention may be used in a variety of end-use applications (e.g., the automotive and/or electronic industries) to form stable injection-molded thin-walled and/or complex-shaped articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.