Stain blocking compositions

Patent metadata

Field	Value
Publication number	US-2016130446-A1
Application number	US-201614996775-A
Country	US
Kind code	A1
Filing date	Jan 15, 2016
Priority date	Nov 17, 2008
Publication date	May 12, 2016
Grant date	—

Abstract

An aqueous coating composition for blocking stains and a method of using the coating composition is described. The coating composition includes an aqueous dispersion of a copolymer that is derived from a single stage emulsion polymerization of an ethylenically unsaturated nonionic monomer, greater than 0 and less than 1.5% by weight of an ethylenically unsaturated strong acid monomer or salt thereof, and greater than 1.5% and less than 3% by weight of methacrylic acid.

First claim

1 - 16 . (canceled)

17 . An aqueous coating composition for blocking stains, comprising:
an aqueous dispersion comprising a single stage emulsion copolymer having a glass transition temperature (Tg) of from 0° C. to 45° C. and derived from a single stage emulsion polymerization of ethylenically unsaturated nonionic monomers comprising from greater than 0% to 60% by weight styrene, one or more of 2-ethylhexyl acrylate and butyl acrylate, and greater than 0 to 5% by weight ureido functional monomer; greater than 0 and less than 1.5% by weight of an ethylenically unsaturated strong acid monomer or salt thereof; and greater than 1.5% and less than 3% by weight of methacrylic acid or salt thereof, wherein all the copolymers in the dispersion derived from an alkyl ester of acrylic acid or methacrylic acid have a glass transition temperature (Tg) of from 0° C. to 45° C.

18 . The composition according to claim 17 , wherein the ethylenically unsaturated nonionic monomer further comprises methyl methacrylate.

19 . The composition according to claim 17 , wherein the ethylenically unsaturated nonionic monomer further comprises a monomer having a functional pendant group, wherein the functional pendant group comprises one or more of amino, silane, imidazole, acetoacetonate, imidazolidione, and diamine functional groups.

20 . The composition according to claim 17 , wherein the single stage emulsion copolymer comprises greater than 0 and less than 1.2% by weight of an ethylenically unsaturated strong acid monomer or salt thereof.

21 . The composition according to claim 17 , wherein the ethylenically unsaturated strong acid monomer comprises a phosphorous-containing monomer.

22 . The composition according to claim 21 , wherein the ethylenically unsaturated strong acid monomer or salt thereof comprises phosphoethyl (meth)acrylate.

23 . The composition according to claim 17 , further comprising one or more surfactants.

24 . The composition according to claim 23 , wherein the one or more surfactants include a tristyrylphenol phosphate.

25 . The composition according to claim 23 , wherein the one or more surfactants include a nonionic alkoxylated carboxylic acid or alcohol having from 8 to 24 carbon atoms.

26 . The composition according to claim 17 , wherein all the copolymers in the dispersion have a glass transition temperature (Tg) of from 0° C. to 45° C.

27 . The composition according to claim 17 , wherein the single stage emulsion copolymer is derived from monomers consisting of the ethylenically unsaturated nonionic monomers, the ethylenically unsaturated strong acid monomer or salt thereof, and the methacrylic acid or salt thereof.

28 . A method for blocking stains, comprising:
(a) forming an aqueous coating composition, comprising an aqueous dispersion comprising a single stage emulsion copolymer having a glass transition temperature (Tg) of from 0° C. to 45° C. and derived from a single stage emulsion polymerization of ethylenically unsaturated nonionic monomers comprising from greater than 0% to 60% by weight styrene, one or more of 2-ethylhexyl acrylate and butyl acrylate, and greater than 0 to 5% by weight ureido functional monomer; greater than 0 and less than 1.5% by weight of an ethylenically unsaturated strong acid monomer or salt thereof; and greater than 1.5% and less than 3% by weight of methacrylic acid or salt thereof, wherein all the copolymers in the dispersion derived from an alkyl ester of acrylic acid or methacrylic acid have a glass transition temperature (Tg) of from 0° C. to 45° C.; (b) applying said aqueous coating composition to a substrate having a stain; and (c) drying, or allowing to dry, said aqueous coating composition to block the stain.

29 . An aqueous coating composition for blocking stains, comprising:
an aqueous dispersion comprising
a single stage emulsion copolymer having a glass transition temperature (Tg) of from 0° C. to 45° C. and derived from a single stage emulsion polymerization of ethylenically unsaturated nonionic monomers, greater than 0 and less than 1.5% by weight of an ethylenically unsaturated strong acid monomer or salt thereof; and greater than 1.5% and less than 3% by weight of methacrylic acid or salt thereof, and
a tristyrylphenol phosphate surfactant,
wherein all the copolymers in the dispersion derived from an alkyl ester of acrylic acid or methacrylic acid have a glass transition temperature (Tg) of from 0° C. to 45° C.

30 . The composition according to claim 29 , wherein the ethylenically unsaturated nonionic monomers include an alkyl acrylate.

31 . The composition according to claim 30 , wherein the ethylenically unsaturated nonionic monomers further include styrene.

32 . The composition according to claim 30 , wherein the ethylenically unsaturated nonionic monomers further include vinyl acetate.

33 . The composition of claim 29 , wherein the ethylenically unsaturated monomers include one or more monomers having functional pendant groups that promote wet adhesion selected from the group of amino, silane, imidazole, acetoacetonate, imidazolidione, diamine, urea and ureido functional groups.

Assignees

• Basf Se

Inventors

• Wildeson Jacob
• Kelly John
• Cosyns Audrey
• Wiese Harm

Classifications

• C09D133/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C09D7/60

  non-macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C09D143/02

  Homopolymers or copolymers of monomers containing phosphorus · CPC title

• C09D133/08 Primary

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C09D133/12

  Homopolymers or copolymers of methyl methacrylate · CPC title