Method for producing an aqueous emulsion
US9096695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2009 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Mar 15, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/58
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a method for producing an aqueous emulsion containing a fluorine-containing copolymer comprising, as copolymerizable monomers, (A) at least one of a perfluoroalkylalkyl acrylate and a corresponding methacrylate represented by the general formula: CnF2n+1CmH2mOCOCR═CH2, wherein R is hydrogen or methyl group, n is 4, 5, or 6, and m is 1, 2, 3, or 4; (B) benzyl acrylate or benzyl methacrylate; (C) a fluorine-free polymerizable monomer other than benzyl acrylate and benzyl methacrylate; and (D) a crosslinkable group-containing polymerizable monomer; the copolymer being produced by previously subjecting 10 to 80 wt. % of the total weight of component (A) and 0 to 60 wt. % of the total weight of component (B) to a first polymerization reaction using an emulsion polymerization method; and then subjecting the remaining components to a second polymerization reaction using an emulsion polymerization method; wherein an emulsifier is used in the emulsion polymerization reaction in an amount of 21 to 150 parts by weight based on 100 parts by weight of the total weight of polymerizable monomers (A) and (B) used in the first polymerization reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.