Blends of aqueous dispersions of fluoropolymers and aqueous dispersions of ethylene/acid or ionomeric copolymers
US6528574B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to an aqueous dispersion of (a) from 0.5 to 99.5 weight percent of a fluoropolymer having an average particle size of from 0.01 to 30 microns; and (b) from 0.5 to 99.5 weight percent of an ethylene copolymer which comprises at least 50% by weight ethylene, 1-35% by weight of an acid-containing unsaturated mono-carboxylic acid, and optionally 0-49% by weight of a moiety selected from at least one of alkyl acrylate, alkyl methacrylate, vinyl ether, carbon monoxide and sulfur dioxide, and further wherein the acid groups are neutralized from 0-100% by a metal ion or other cations, the weight percents being based on the total amounts of (a) and (b) only. The invention also relates to a coprecipate of this aqueous dispersion and a dry powder made by drying the aqueous dispersion or coprecipitate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.