US 2009/0030114 A1Published application

Fluoropolymer emulsions

OwnerYing Wang, Peter Michael Murphy +1inventors

InventorsYing Wang, Peter Michael Murphy, Sheng Peng

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Abstract

A core-shell emulsion polymer comprising A) a core composition comprising components (a) and (b): (a) from about 40 to about 95% of styrene, alkyl substituted styrene, or alkyl (meth)acrylate; and (b) from about 5 to about 60% of vinylidene chloride, vinyl chloride, or combinations thereof; and B) a shell composition components (c) and (d): (c) from about 50 to about 85% of (I) Rf1(CH2)m Z-C(O)—C(R1)═CH2 (II) Rf2(CH2CF2)q(CH2CH2)rZ-C(O)—C(R1)═CH2, or (III) Rf3O(CF2CF2)q(CH2CH2)rZ-C(O)—C(R1)═CH2 wherein R1 is hydrogen, Cl, F or CH3; Z is —O—, —NH— or —S—; Rf1 and Rf2 are each a C4 or C6 perfluoroalkyl; and Rf3 is a C2 to C7 perfluoroalkyl optionally interrupted by one to three ether oxygens; and (d) from about 15 to about 50% of styrene, alkyl substituted styrene, or alkyl (meth)acrylate, provided that i) the core composition comprises from about 20 to about 75% of the polymer; ii) when Rf1 or Rf2 has 4 carbons, R1 is CH3; and iii) when Rf3 has 2 or 3 carbons, R1 is CH3.

Claims20

Dependent claims

An oil- and water-repellant core-shell emulsion polymer comprising

A) a core composition, prepared from a first polymerization, comprising, on a water-free and surfactant-free basis, components (a) and (b):
(a) from about 40 to about 95% by weight of one or more monomers selected from the group consisting of styrene;
alkyl substituted styrene wherein said alkyl is a linear, cyclic or branched hydrocarbon having 1 to about 18 carbons;
and alkyl (meth)acrylate wherein said alkyl is a linear, cyclic or branched hydrocarbon having from about 6 to about 18 carbons;
and
(b) from about 5 to about 60% by weight of one or more monomers selected from the group consisting of vinylidene chloride, vinyl chloride, and combinations thereof;
and
B) a shell composition, prepared from a second polymerization in the presence of the core composition, comprising, on a water-free and surfactant-free basis, components (c) and (d):
(c) from about 50 to about 85% by weight of one or more fluorinated monomers of formula (I), (II) or (III):
(I) Rf1(CH2)mZ-C(O)—C(R1)═CH2
(II) Rf2(CH2CF2)q(CH2CH2)rZ-C(O)—C(R1)═CH2
(III) Rf30(CF2CF2)q(CH2CH2)rZ-C(O)—C(R1)═CH2
wherein
m is an integer of 1 to about 6;
q and r are each independently an integer of 1 to about 3;
R1 is hydrogen, Cl, F or CH3;
Z is —O—, —NH— or —S—;
Rf1 is a linear or branched perfluoroalkyl group having 4 or 6 carbon atoms;
Rf2 is a linear or branched perfluoroalkyl group having from about 4 to about 6 carbon atoms;
and
Rf3 is a linear or branched perfluoroalkyl group having from about 2 to about 7 carbon atoms optionally interrupted by one, two or three ether oxygen atoms;
and
(d) from about 15 to about 50% by weight of monomers selected from the group consisting of styrene;
alkyl substituted styrene wherein said alkyl is a linear, cyclic or branched hydrocarbon having 1 to 18 carbons;
and alkyl (meth)acrylate wherein said alkyl is a linear, cyclic or branched hydrocarbon having 6 to 18 carbons;
provided that i) the core composition comprises from about 20 to about 75% by weight of the polymer;
ii) when Rf1 or Rf2 has 4 carbon atoms, R1 is CH3;
and iii) when Rf3 has 2 or 3 carbon atoms, R1 is CH3.

25 more elements

A method of treating a fibrous substrate to impart oil repellency and water repellency comprising applying to the surface of the substrate a core-shell emulsion polymer comprising

A) a core composition, prepared from a first polymerization, comprising, on a water-free and surfactant-free basis, components (a) and (b):
(a) from about 40 to about 95% by weight of one or more monomers selected from the group consisting of styrene;
alkyl substituted styrene wherein said alkyl is a linear, cyclic or branched hydrocarbon having 1 to 18 carbons;
and alkyl (meth)acrylate wherein said alkyl is a linear, cyclic or branched hydrocarbon having 6 to 18 carbons;
and
(b) from about 5 to about 60% by weight of one or more monomer(s) derived from the group consisting of vinylidene chloride;
vinyl chloride;
and combinations thereof;
and
B) a shell composition, prepared from a second polymerization in the presence of the core composition, comprising, on a water-free and surfactant-free basis, components (c) and (d):
c) from about 50 to about 85% by weight of one or more fluorinated monomers of formula (I), (II) or (III):
(I) Rf1(CH2)mZ-C(O)—C(R1)═CH2
(II) Rf2(CH2CF2)q(CH2CH2)rZ-C(O)—C(R1)═CH2
(III) Rf3O(CF2CF2)q(CH2CH2)rZ-C(O)—C(R1)═CH2
wherein
m is an integer of 1 to about 6;
q and r are each independently an integer of 1 to about 3;
R1 is hydrogen, Cl, F or CH3;
Z is —O—, —NH— or —S—;
Rf1 is a linear or branched perfluoroalkyl group having 4 or 6 carbon atoms;
Rf2 is a linear or branched perfluoroalkyl group having from about 4 to about 6 carbon atoms;
and
Rf3 is a linear or branched perfluoroalkyl group having from about 2 to about 7 carbon atoms optionally interrupted by one, two or three ether oxygen atoms;
and
d) from about 15 to about 50% by weight of monomers selected from the group consisting of styrene;
alkyl substituted styrene wherein said alkyl is a linear, cyclic or branched hydrocarbon having 1 to 18 carbons;
and alkyl (meth)acrylate wherein said alkyl is a linear, cyclic or branched hydrocarbon having 6 to 18 carbons;
provided that i) the core composition comprises from about 20 to about 75% by weight of the polymer;
ii) when Rf1 or Rf2 has 4 carbon atoms, R1 is CH3;
and iii) when Rf3 has 2 or 3 carbon atoms, R1 is CH3.

27 more elements

Dependencies are inferred from the claim text.