US5013787A
Expired / Lapsed
US
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Copolymers as thickeners and modifiers for latex systems
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1989-12-29
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Granted: 1991-05-07
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Expires: 2009-12-29
Abstract
Abstract A thickened aqueous copolymer solution useful for thickening and improving the properties of latex systems comprising a copolymer having as monomeric units: about 79-99 percent of a (meth)acrylic acid salt of sodium, potassium, or ammonium; about 0-20 percent of (meth)acrylic acid; about 0-20 percent of a lower alkyl ester of (meth)acrylic acid; about 1-21 percent of surfactant units selected from the urea reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having amine functionality; and about 0-1 percent of a copolymerizable polyethylenically unsatured monomer, said percentages being by weight based on the total weight of monomeric units in said copolymer.
Inventors
- 👤 Milagros C. Barron
- 👤 Ronald L. Swope
- 👤 John M. Wilkerson, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:32
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C09K; C09K23/00; C09K23/16; C08L; C08L33/00; C08L33/02; C08L33/04; C08L33/06; C08L33/08; C08L33/10; C08L75/00; C08L75/02; Y; Y10; Y10S; Y10S526/00; Y10S526/932; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
229 words
A dry copolymer product useful for thickening and improving the rheology and dry tensile strength of latex systems comprising a copolymer having as monomeric units: (A) about 79-99 percent of (meth)acrylic acid salt of sodium, potassium or ammonium; (B) about 0-20 percent of (meth)acrylic acid; (C) about 0-20 percent of lower alkyl ester of (meth)acrylic acid; (D) about 1-21 percent of surfactant monomer which is the urea reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having the formula ##STR4## where R 1 is a C 8 to C 20 alkyl or a C 8 to C 20 alkylphenyl or a di(C 8 to C 20 alkyl)phenyl, n and m are independently selected from 2 to 4, a and c are independently selected from the range of 0 to 100, provided that a+c is within the range of 2 to 100; R 2 and R 3 are independently selected from CH 3 or CH 2 CH 3 , b and d are independently selected from the range of 0 to 50, provided that b+d is within the range of 0 to 50; and e is form 1 to 50; wherein the sum of a+c is always greater than the sum of b+d; (E) about 0-1 percent of copolymerizable polyethylenically unsaturated monomer, said percentages being by weight based on the total weight of monomeric units in said copolymer.
Claim 2
Dependent Claim
229 words
A dry copolymer product useful for thickening and improving the rheology and dry tensile strength of latex systems comprising a copolymer having as monomeric units: (A) about 79-99 percent of (meth)acrylic acid salt of sodium, potassium or ammonium; (B) about 0-20 percent of (meth)acrylic acid; (C) about 0-20 percent of lower alkyl ester of (meth)acrylic acid; (D) about 1-21 percent of surfactant monomer which is the urea reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having the formula ##STR4## where R 1 is a C 8 to C 20 alkyl or a C 8 to C 20 alkylphenyl or a di(C 8 to C 20 alkyl)phenyl, n and m are independently selected from 2 to 4, a and c are independently selected from the range of 0 to 100, provided that a+c is within the range of 2 to 100; R 2 and R 3 are independently selected from CH 3 or CH 2 CH 3 , b and d are independently selected from the range of 0 to 50, provided that b+d is within the range of 0 to 50; and e is form 1 to 50; wherein the sum of a+c is always greater than the sum of b+d; (E) about 0-1 percent of copolymerizable polyethylenically unsaturated monomer, said percentages being by weight based on the total weight of monomeric units in said copolymer.
Claim 3
Dependent Claim
63 words
A dry copolymer product according to claim 1 wherein the nonionic surfactant of (D) has the formula ##STR5## where R 1 is octylphenyl, di-octylphenyl, nonylphenyl or di-nonylphenyl, n or m is an integer from 2 to 4, a and c are from 3 to 30, R 2 and R 3 are CH 2 CH 3 , and b is from 0 to 10.
Claim 4
Dependent Claim
46 words
A dry copolymer product according to claim 1 in which said copolymer is composed of (a) about 92-99 percent (meth)acrylate salt units, (B) about 0-8 percent (meth)acrylic acid units, (C) about 0-8 percent (meth)acrylic lower alkyl ester units and (E) about 0.1-0.5 percent crosslinking monomer units.
Claim 5
Dependent Claim
39 words
A dry copolymer product according to claim 1 wherein said (meth)acrylic acid salt units (A) comprise sodium acrylate units and said surfactant monomer units are the urea reaction product of alpha-, alpha-, dimethyl-m-isopropenyl benzyl isocyanate with said non-ionic surfactant.
Claim 6
Dependent Claim
55 words
The method of improving the rheological properties of a latex composition which comprises adding thereto from about 0.5 to about 2.5 parts by weight, dry basis of a copolymer of claim 2, in aqueous solution, based on 100 dry parts of latex, said solution having a solids content of from about 10 to about 15.
Claim 7
Dependent Claim
55 words
The method of improving the rheological properties of a latex composition which comprises adding thereto from about 0.5 to about 2.5 parts by weight, dry basis of a copolymer of claim 3, in aqueous solution, based on 100 dry parts of latex, said solution having a solids content of from about 10 to about 15.
Claim 8
Independent Claim
266 words
A method of improving the rheological properties and dry tensile strength of a latex composition which comprises adding thereto from about 0.2 to about 3 parts by weight, dry basis, of a copolymer having as monomeric units: (A) about 79-99 percent of a (meth)acrylic acid salt of sodium, potassium or ammonium; (B) about 0-20 percent of (meth)acrylic acid; (C) about 0-20 percent of a lower alkyl ester of (meth)acrylic acid; (D) about 1-21 percent of surfactant monomer which is the urea reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having the formula ##STR6## where R 1 is a C 8 to C 20 alkyl or a C 8 to C 20 alkylphenyl or a di(C 8 to C 20 alkyl)phenyl, n and m are independently selected from 2 to 4, a and c are independently selected from the range of 0 to 100, provided that a+c is within the range of 2 to 100; R 2 and R 3 are independently selected from CH 3 or CH 2 CH 3 , b and d are independently selected from the range of 0 to 50, provided that b+e is within the range of 0 to 50; and e is from 1 to 50; wherein the sum of a+c is always greater than the sum of b+d; (E) about 0-1 percent of copolymerizable polyethylenically unsaturated monomer, said percentages being by weight based on the total weight of monomeric units in said copolymer; in aqueous solution, based on 100 dry parts of latex, said solution having a solids content of from about 8 to about 20.
Claim 9
Independent Claim
266 words
A method of improving the rheological properties and dry tensile strength of a latex composition which comprises adding thereto from about 0.2 to about 3 parts by weight, dry basis, of a copolymer having as monomeric units: (A) about 79-99 percent of a (meth)acrylic acid salt of sodium, potassium or ammonium; (B) about 0-20 percent of (meth)acrylic acid; (C) about 0-20 percent of a lower alkyl ester of (meth)acrylic acid; (D) about 1-21 percent of surfactant monomer which is the urea reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having the formula ##STR6## where R 1 is a C 8 to C 20 alkyl or a C 8 to C 20 alkylphenyl or a di(C 8 to C 20 alkyl)phenyl, n and m are independently selected from 2 to 4, a and c are independently selected from the range of 0 to 100, provided that a+c is within the range of 2 to 100; R 2 and R 3 are independently selected from CH 3 or CH 2 CH 3 , b and d are independently selected from the range of 0 to 50, provided that b+e is within the range of 0 to 50; and e is from 1 to 50; wherein the sum of a+c is always greater than the sum of b+d; (E) about 0-1 percent of copolymerizable polyethylenically unsaturated monomer, said percentages being by weight based on the total weight of monomeric units in said copolymer; in aqueous solution, based on 100 dry parts of latex, said solution having a solids content of from about 8 to about 20.
References Cited (Backward Citations)
US4514552A
Cited
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