Method for producing fluorine-containing ploymer, aqueous dispersion of fluorine-containing polymer,2-acyloxycarboxylic acid derivative , and surface active agent
AssigneeDaikin Industries, Ltd.
InventorsNobuhiko Tsuda, Yoshihiro Yamamoto, Yoshinori Nanba, Yasuhiko Sawada, Tetsuo Shimizu
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Abstract
The present invention provides a method of producing a fluoropolymer, wherein polymerization using a carboxylate ester bond-containing carboxylic acid derivative as a surfactant in an aqueous medium to give the fluoropolymer is conducted, the above carboxylate ester bond-containing carboxylic acid derivative has a carboxylate ester bond and —COOM (M representing H, NH4, Li, Na or K), the above carboxylate ester bond may optionally be substituted by fluorine atom.
Claims16
A method of producing a fluoropolymer,
- wherein polymerization using a carboxylate ester bond-containing carboxylic acid derivative as a surfactant in an aqueous medium to give the fluoropolymer is conducted,
- said carboxylate ester bond-containing carboxylic acid derivative has a carboxylate ester bond and —COOM (M representing H, NH4, Li, Na or K),
- said carboxylate ester bond may optionally be substituted by fluorine atom.
A fluoropolymer aqueous dispersion which comprises a particle comprising a fluoropolymer, a carboxylate ester bond-containing carboxylic acid derivative and an aqueous medium,
- wherein said carboxylate ester bond-containing carboxylic acid derivative has a carboxylate ester bond and —COOM (M representing H, NH4, Li, Na or K), said carboxylate ester bond may optionally be substituted by fluorine atom.
A 2-acyloxycarboxylic acid derivative which is represented by the general formula (1):
- wherein Rf1 and Rf2 are the same or different and each represents H, F, a fluoroalkyl group containing 1 to 20 carbon atoms or an ether oxygen-containing fluoroalkyl group containing 1 to 20 carbon atoms, Rf represents a fluoroalkyl group containing 1 to 20 carbon atoms or an ether oxygen-containing fluoroalkyl group containing 1 to 20 carbon atoms, M represents H, NH4, Li, Na or K, a and b each represents an integer of 0 to 2 and d represents an integer of 1 to 3 provided that a, b and d satisfy the relation a+b+d=3;
- Rf1, Rf2 and Rf are the same or different.
Dependencies are inferred from the claim text.