Mixture of thermoplastic aromatic copolyetherketone/sulphone and a sulpur-containing material and method of crosslinking the same
US3993628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Sep 30, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A mixture of i) a thermoplastic copolyetherketone/sulphone containing --AR--CO (75-90%) and --Ar--SO.sub.2 -- (25-10%) repeat units wherein Ar is a bivalent aromatic radical which may vary from unit to unit and at least some of the Ar groups contain aromatic ether links ortho or para to at least one --CO-- or --SO.sub.2 -- group and ii) sulphur, a dithiol, or a polydisulphide in such a quantity that the amount of sulphur (as such or in thiol or disulphide groups) is 0.01 to 5% by weight of the combined weight of copolyetherketone/sulphone and sulphur. On heating this mixture to 300.degree.-450.degree. C the molecular weight of the polymer increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.