Aqueous dispersion, composite powder and organosol of fluorine-containing polymer
US5164426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jun 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous dispersion comprising composite colloidal particles having an average particle size of 0.05 to 1.0 micrometer each of which comprises a core made of a copolymer comprising 99-100% by weight of tetrafluoroethylene and 0 to 1% by weight of a fluorine-containing olefin which is copolymerizable with tetrafluoroethylene and a shell made of a polymer having a glass transition temperature of at least 50.degree. C. which comprises PA0 (a) 60 to 100% by mole of at least one .alpha.-substituted acrylate of the formula: EQU CH.sub.2 .dbd.CXCOOR.sub.f (I) PA0 wherein X is a methyl group, a fluorine atom or a trifluoromethyl group, and R.sub.f is a fluoroalkyl group or a fluoro(alkoxyalkyl) group and PA0 (b) 0 to 40% by mole of at least one monomer copolymerizable with said acrylate (I), from which composite fluorine-containing polymer particles having good redispersibility in a liquid medium and improved blending properties with other resins or elastomers are prepared and from which an organosol of the composite fluorine-containing polymer particles is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.