Melt stable phenylene sulfide/sulfone polymers and method
US5039788A · kind A · utility
3Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1990 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Apr 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2381/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A phenylene sulfide/sulfone polymer with relatively good melt stability and a method of producing such a polymer are provided. A previously produced phenylene sulfide/sulfone polymer is redissolved in N-methyl-2-pyrrolidone to form a solution. This solution is combined with an alcohol to precipitate highly melt stable phenylene sulfide/sulfone polymer in a particulate form. The alcohol has one to four carbon atoms, such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and the like and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.