Water- and oil-repellent composition and process for production thereof
AssigneeDaikin Industries, Ltd.
InventorMasato Kashiwagi
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Abstract
A water- and oil-repellent composition consisting of (A) a fluorine-containing copolymer comprising at least 20% by weight (based on the copolymer) of (a1) units derived from a polymerizable monomer having a C1-6 polyfluoroalkyl group or a polyfluoroalkenyl group, (B) a surfactant component comprising as the essential components (b1) a nonionic surfactant having an HLB value of 12 or below and (b2) a nonionic surfactant having an HLB value of 15 or above, and (C) an aqueous medium substantially consisting of water. This composition is free from operationally or environmentally undesirable solvents and superior to conventional ones in stabilities such as mechanical stability, chemical stability, and long-term shelf stability.
Claims14
An aqueous water- and oil-repellent composition comprising:
- (A) a fluorine-containing copolymer which comprises:
- (a1) a polymerizable monomer which contains a polyfluoroalkyl or polyfluoroalkenyl group having 1 to 6 carbon atoms,
- (a2) a polymerizable monomer copolymerizable with the monomer (a1), and
- if necessary, in addition to the polymerizable monomers (a1) and (a2),
- (a3) a polymerizable monomer containing a polar group or a reactive group,
- the amount of the polymerizable monomer (a1) is at least 20% by weight based on the copolymer;
- (B) a surfactant which comprises:
- (b1) a nonionic surfactant having an HLB of at most 12, and
- (b2) a nonionic surfactant having an HLB of at least 15,
- (C) an aqueous medium (C) which essentially consists of water,
- wherein the polymerizable monomer (a2) constituting the fluorine-containing copolymer (A) is such polymerizable monomer that a homopolymer of the polymerizable monomer (a2) has a glass transition temperature (Tg) of at least 55° C., and/or a melting point (Tm) of at least 30° C.
Dependencies are inferred from the claim text.