Compatible LCP blends via direct esterification
US5182334A · kind A · utility
10Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Apr 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for making a compatible LCP blend by reactively esterifying an LCP having a carboxylic acid or ester end group with either PPO or PPS, or derivatives thereof, using a catalytic mixture containing boric acid and polyphosphoric acid or sulfuric acid. The carboxylic functionality on the LCP reacts with the hydroxyl end group on the PPO or the thiol end group on the PPS to form an ester or thioester linkage. The two polymers to be blended are melt mixed with the catalyst mixture and extruded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.