US4514552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali soluble latex thickeners
Assignee: DeSoto Inc
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Filing: 1984-08-23
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Granted: 1985-04-30
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Expires: 2004-08-23
Abstract
Abstract Alkali soluble thickeners are disclosed which are aqueous emulsion copolymers of: (A) about 20-70 weight percent of an alpha, beta-monoethylenically unsaturated carboxylic acid, typically methacrylic acid; (B) about 20-80 weight percent of a monoethylenically unsaturated monomer lacking surfactant capacity, typically ethyl acrylate; (C) about 0.5-60 weight percent of a nonionic urethane monomer which is the urethane reaction product of a monohydric nonionic surfactant with a monoethylenically unsaturated monoisocyanate, preferably one lacking ester groups like alpha, alpha-dimethyl-m-isopropenyl benzyl isocyanate; and (D) from 0 up to about 2 weight percent of a polyethylenically unsaturated monomer. These emulsion copolymers are solubilized in water with the aid of an alkali, like ammonium hydroxide. When the copolymers are added to latex paints and neutralized, the viscosity of the paint is increased, brush drag is increased, and the paint rheology is otherwise improved.
Inventors
- 👤 Gregory D. Shay
- 👤 Emmojean Eldridge
- 👤 James E. Kail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:47
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C08L; C08L33/00; C08L33/02; C08L33/04; C08L33/06; C08L33/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
An alkali soluble thickener which is an aqueous emulsion copolymer of: (A) about 20-70 weight percent of an alpha, beta-monoethylenically unsaturated carboxylic acid, (B) about 20-80 weight percent of a monoethylenically unsaturated monomer lacking surfactant capacity; (C) about 0.5-60 weight percent of a non-ionic urethane monomer which is the urethane reaction product of a nonohydric nonionic surfactant with a monoethylenically unsaturated monoisocyanate; and (D) from 0 up to about 2 weight percent of a polyethylenically unsaturated monomer.
Claim 2
Dependent Claim
77 words
An alkali soluble thickener which is an aqueous emulsion copolymer of: (A) about 20-70 weight percent of an alpha, beta-monoethylenically unsaturated carboxylic acid, (B) about 20-80 weight percent of a monoethylenically unsaturated monomer lacking surfactant capacity; (C) about 0.5-60 weight percent of a non-ionic urethane monomer which is the urethane reaction product of a nonohydric nonionic surfactant with a monoethylenically unsaturated monoisocyanate; and (D) from 0 up to about 2 weight percent of a polyethylenically unsaturated monomer.
Claim 3
Dependent Claim
55 words
An alkali soluble thickener as recited in claim 1 in which said component (C) is present in an amount of from 10-50 weight percent and said monohydric nonionic surfactant is an ethoxylated aliphatic alcohol or alkyl phenol in which a carbon chain containing at least 6 carbon atoms provides the hydrophobic portion of said surfactant.
Claim 4
Dependent Claim
78 words
An alkali soluble thickener as recited in claim 1 in which said monohydric nonionic surfactant has the formula: R--O--CH.sub.2 --CHR'O).sub.m --CH.sub.2 --CH.sub.2 O).sub.n H in which R is an alkyl group containing 6-22 carbon atoms or an alkaryl group containing 8-22 carbon atoms, R' is C 1 -C 4 alkyl, n is an average number from about 6-150, and m is an average number of from 0-50 provided n is at least as great as m and n+m=6-150.
Claim 5
Dependent Claim
24 words
An alkali soluble thickener as recited in claim 1 in which said component (A) is present in an amount of from 25-55 weight percent.
Claim 6
Dependent Claim
17 words
An alkali soluble thickener as recited in claim 4 in which said component (A) is methacrylic acid.
Claim 7
Dependent Claim
23 words
An alkali soluble thickener as recited in claim 1 in which said component (B) is present in an amount of 30-65 weight percent.
Claim 8
Dependent Claim
17 words
An alkali soluble thickener as recited in claim 6 in which said component (B) is ethyl acrylate.
Claim 9
Dependent Claim
17 words
An alkali soluble thickener as recited in claim 1 in which said component (C) contains styryl unsaturation.
Claim 10
Dependent Claim
26 words
An alkali soluble thickener as recited in claim 8 in which said component (C) is urethane of said monohydric nonionic surfactant with alpha, alpha-dimethyl-m-isopropenyl benzyl isocyanate.
Claim 11
Dependent Claim
23 words
An alkali soluble thickener as recited in claim 1 in which said component (C) is a urethane of an ethoxylate of nonyl phenol.
Claim 12
Dependent Claim
26 words
An alkali soluble thickener as recited in claim 10 in which said ethoxylate contains about 50 moles of adducted ethylene oxide per mole of nonyl phenol.
Claim 13
Dependent Claim
12 words
An aqueous latex containing the neutralized aqueous emulsion copolymer of claim 1.
Claim 14
Dependent Claim
17 words
An aqueous latex as recited in claim 12 in which said copolymer is neutralized with ammonium hydroxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |