US4764554A
Expired / Lapsed
US
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Thickeners for emulsion paints
Assignee: Akzo Nobel Decorative Coatings Ltd
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Filing: 1987-06-01
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Granted: 1988-08-16
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Expires: 2007-06-01
Abstract
Abstract The thickener comprises: (a) 25-45% of methacrylic acid, acrylic acid or a mixture thereof; (b) 25-65% of alkyl acrylate such as methyl acrylate, ethyl acrylate, butyl acrylate, alkyl methacrylate such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, lauryl methacrylate or a mixture thereof; (c) 1-40% of an ester of composition; <IMAGE> in which R is a C12-C25 alkyl group, n=at least 10; m=at least 5 A=H, -(CH2CH2O)n-R, C1-C20 alkyl,-(CH2CH2O)m-H or -(CH2CH2O)m-CH3 (d) 0-1% of a polyethylenically unsaturated monomer effective for chain branching or crosslinking such as diallyl maleate, diallyl phthalate, divinyl benzene, allyl methacrylate, ethylene glycol dimethacrylate, or trimethylol propane triacrylate, (e) optionally, but preferably, up to 10% of an ethylenically unsaturated hydrophylic monomer.
Inventors
- 👤 Christopher J. Tonge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:56
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C08L; C08L33/00; C08L33/02; C08L33/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A thickener comprising a polymer prepared from the following components: (a) 25-45% of methacrylic acid, acrylic acid or a mixture thereof; (b) 25-65% of alkyl acrylate, alkyl methacrylate, or a mixture thereof; (c) 1-40% of an ester of composition; ##STR7## in which R is a C 12 -C 25 alkyl group, n=at least 10; m=at least 5 A=H, --(CH 2 CH 2 O) n --R, C 1 -C 20 alkyl, --(CH 2 CH 2 O)m--H or --(CH 2 CH 2 O) m --CH 3 (d) 0-1% of a polyethylenically unsaturated monomer effective for chain branching or crosslinking, the total of components (a), (b), (c) and (d) being in substance 100%.
Claim 2
Dependent Claim
110 words
A thickener comprising a polymer prepared from the following components: (a) 25-45% of methacrylic acid, acrylic acid or a mixture thereof; (b) 25-65% of alkyl acrylate, alkyl methacrylate, or a mixture thereof; (c) 1-40% of an ester of composition; ##STR7## in which R is a C 12 -C 25 alkyl group, n=at least 10; m=at least 5 A=H, --(CH 2 CH 2 O) n --R, C 1 -C 20 alkyl, --(CH 2 CH 2 O)m--H or --(CH 2 CH 2 O) m --CH 3 (d) 0-1% of a polyethylenically unsaturated monomer effective for chain branching or crosslinking, the total of components (a), (b), (c) and (d) being in substance 100%.
Claim 3
Dependent Claim
63 words
A thickener according to claim 1 but containing not more than 10% of an ethylenically unsaturated hydrophylic monomer (e) of the general formula ##STR8## in which R is H or --CH 3 , m is an integer between 0 and 10, n is an integer between 5 and 20, the total of components (a), (b), (c), (d) and (e) being in substance 100%.
Claim 4
Dependent Claim
31 words
A thickener according to claim 1 in which (a) is 30-40%, (b) is 40-60%, (c) is 3-12%, (d) is 0.05-0.5% and the total of (a), (b), (c) and (d) is 100%.
Claim 5
Dependent Claim
37 words
A thickener according to claim 2 in which (a) is 30-40%, (b) is 30-60%, (c) is 3-12%, (d) is 0.05-0.5%, (e) is 0.5 to 10% and the total of (a), (b), (c), (d) and (e) is 100%.
Claim 6
Dependent Claim
26 words
A thickener according to claim 2 in which the formula of (c) is determined by: A=H, n=15-25 and R is a C 16 -C 20 alkyl.
Claim 7
Dependent Claim
13 words
A method of thickening an emulsion paint utilising the composition of claim 2.
Claim 8
Dependent Claim
34 words
A thickener according to claim 1 wherein said polyethylenically unsaturated monomer effective for chain branching or cross linking is diallyl maleate, diallyl phthalate, divinyl benzene, allyl methacrylate, ethylene glycol dimethacrylate, or trimethylol propane triacrylate.
Claim 9
Dependent Claim
162 words
A thickener comprising a polymer prepared from the following components: (a) 25-45% of methacrylic acid, acrylic acid or a mixture thereof; (b) 25-65% of alkyl acrylate, alkyl methacrylate, or a mixture thereof; (c) 1-40% of an ester of composition; CH--CO 2 A CH--CO 2 --(CH 2 CH 2 O) n --R in which R is a C 12 -C 25 alkyl group, n=at least 10; m=at least 5 A=H, --(CH 2 CH 2 O) n --R, C 1 -C 20 alkyl, --(CH 2 CH 2 O)m--H or --(CH 2 CH 2 O) m --CH 3 (d) 0-1% of a polyethylenically unsaturated monomer effective for chain branching or crosslinking, (e) 0.5 to 10% of an ethylenically unsaturated hydrophylic monomer (e) of the general formula ##STR9## in which R is H or --CH 3 , m is an integer between 0 and 10, n is an integer between 5 and 20, the total components (a), (b), (c), (d), and (e) being in substance 100%.
Claim 10
Dependent Claim
162 words
A thickener comprising a polymer prepared from the following components: (a) 25-45% of methacrylic acid, acrylic acid or a mixture thereof; (b) 25-65% of alkyl acrylate, alkyl methacrylate, or a mixture thereof; (c) 1-40% of an ester of composition; CH--CO 2 A CH--CO 2 --(CH 2 CH 2 O) n --R in which R is a C 12 -C 25 alkyl group, n=at least 10; m=at least 5 A=H, --(CH 2 CH 2 O) n --R, C 1 -C 20 alkyl, --(CH 2 CH 2 O)m--H or --(CH 2 CH 2 O) m --CH 3 (d) 0-1% of a polyethylenically unsaturated monomer effective for chain branching or crosslinking, (e) 0.5 to 10% of an ethylenically unsaturated hydrophylic monomer (e) of the general formula ##STR9## in which R is H or --CH 3 , m is an integer between 0 and 10, n is an integer between 5 and 20, the total components (a), (b), (c), (d), and (e) being in substance 100%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |