Method for purifying polymer
US5237048A · kind A · utility
9Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Feb 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/001
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is disclosed a method for purifying a polymer by extracting volatile materials contained in the molten polymer. According to the disclosure, a polymer having a very high degree of extraction of volatile materials can be obtained. The polymer obtained by the method of disclosure can meet the severe demands of the market that restricts the concentration of remaining volatile material impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.