Aqueous emulsion composition
AssigneeDaikin Industries, Ltd.
InventorsTsukasa Aga, Hirotoshi Sakashita, Masato Ioki, Masahiro Miyahara
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Abstract
An aqueous emulsion composition comprising (A) an aqueous resin emulsion comprising a fluorine-containing polymer and (B) a surfactant of the formula: R1O—(CH2CH2O)p—(R2O)q—R3 (1) wherein R1 is an alkyl group or an alkenyl group, R2 is an alkylene group, R3 is a hydrogen atom, an alkyl group or an alkenyl group, p is the number of at least 2, q is the number of at least 1, and p and q are such numbers that the weight ratio of the polyoxyethylene block is from 5 to 80% by weight based on whole molecule, is excellent in stability against impurity and mechanical stability.
Claims5
An aqueous emulsion composition comprising:
- (A) an aqueous resin emulsion comprising
- a homopolymer or copolymer comprising at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate or methacrylate group, or
- a copolymer comprising said polymerizable compound and another compound copolymerizable therewith, and
- (B) a surfactant of the formula:
- R1O—(CH2CH2O)p—(R2O)q—R3 (1)
- wherein R1 is an alkyl group having 1 to 22 carbon atoms or an alkenyl group having 2 to 22 carbon atoms,
- R2 is propylene,
- R3 is a hydrogen atom,
- p is the number of at least 2,
- q is the number of at least 1, and
- p and q are such numbers that the weight ratio of the polyoxyethylene block is from 5 to 80% by weight based on whole molecule,
- wherein the surfactant (B) is added to the aqueous resin emulsion (A), after the polymerizable compound is emulsion-polymerized to give the aqueous resin emulsion (A) comprising the homopolymer or copolymer.
A method of producing aqueous emulsion composition comprising:
- (A) an aqueous resin emulsion comprising
- a homopolymer or copolymer comprising at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate or methacrylate group, or
- a copolymer comprising said polymerizable compound and another compound copolymerizable therewith, and
- (B) a surfactant of the formula:
- R1O—(CH2CH2O)p—(R2O )q—R3 (1)
- wherein R1 is an alkyl group having 1 to 22 carbon atoms or an alkenyl group having 2 to 22 carbon atoms,
- R2 is an alkylene group having at least 3 carbon atoms,
- R3 is a hydrogen atom,
- p is the number of at least 2,
- q is the number of at least 1, and
- p and q are such numbers that the weight ratio of the polyoxyethylene block is from 5 to 80% by weight based on whole molecule,
- said method comprising:
- emulsion-polymerizing the polymerizable compound to give the aqueous resin emulsion (A) comprising the homopolymer or copolymer;
- and then
- adding the surfactant (B) to the aqueous resin emulsion (A) to give the aqueous emulsion composition.
Dependencies are inferred from the claim text.