Nucleating system for polyarylene sulfide compositions
US9080036B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Jun 6, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A nucleating system for a thermoplastic composition that contains a polyarylene sulfide is provided. The nucleating system includes a combination of an inorganic crystalline compound and an aromatic amide oligomer. The present inventors have discovered that the combination of these different types of nucleating agents result in excellent crystallization properties (e.g., rate of crystallization). Due to the improved crystallization rate, the thermoplastic composition can be molded at lower temperatures to still achieve the same degree of crystallization. In addition to minimizing the energy requirements of the molding operating, the use of lower temperatures can also decrease the production of “flash” normally associated with high temperature molding operations. The composition may also possess good viscosity properties that allow it to be readily molded into parts of a variety of different shapes and sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.