Method for curing fluoropolymer
US6835782B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer having a structure of the formula: in which X, Y and Z represent independently each other H, F, Cl, Br or I, provided that at least one of X, Y and Z is F; R represents a straight or branched fluorinated alkylene group which may contain an oxygen atom; x and y represent mole percentages and x is from 1 to 100% by mole; A is —CN, —NCO, —COOR′ in which R′ is H or an alkyl group having 1 to 10 carbon atoms, an acid anhydride group or an unsaturated hydrocarbon group; and M is a repeating unit derived from a copolymerizable monomer is treated with a crosslinking agent selected from ammonia, diamines and polyol compounds and crosslinked through the side functional groups of the polymer. This crosslinking method can be carried out at room temperature and provides a transparent fluoropolymer having better heat resistance than conventional transparent thermoplastic resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.