Aromatic polymers of increased resistance to flow and molecular weight obtained by irradiation
US3975249A · kind A · utility
1Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1974 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Apr 16, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic polymers of increased resistance to flow and molecular weight are obtained by irradiation using .beta.-rays or .gamma.-rays at temperatures up to 400.degree.C of an aromatic polymer whose molecular chains comprise benzenoid groups and bivalent linking groups, and where irradiation is .gamma.-rays by heating subsequent to irradiaton at 200.degree.C to 400.degree.C. The polymeric materials having increased molecular weight are useful for coating non-cooking surfaces of cookware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.