US3980602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic polymer dispersant for aqueous acrylic coating compositions
Assignee: EIDP Inc
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Filing: 1975-02-28
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Granted: 1976-09-14
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Expires: 1995-02-28
Abstract
Abstract An acrylic polymer dispersant useful for preparing pigment dispersions utilized in aqueous acrylic coating compositions; the acrylic polymer is of 1. styrene, an alkyl methacrylate such as methyl methacrylate, isodecyl methacrylate or stearyl methacrylate or a mixture of styrene and an alkyl methacrylate; 2. an alkyl acrylate having 2-12 carbon atoms in the alkyl group; and 3. acrylic acid or methacrylic acid; the acrylic polymer has a glass transition temperature of about -90°C. to 70°C. and a weight average molecular weight of about 500-30,000.
Inventors
- 👤 Henry L. Jakubauskas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:26
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/009; C09D7/00; C09D7/40; C09D7/45; Y; Y10; Y10S; Y10S526/00; Y10S526/932
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
An acrylic polymer dispersant for dispersing pigments in aqueous acrylic paints consisting essentially of about 1. 46-62% by weight, based on the weight of acrylic polymer, of constituents selected from the group consisting of styrene, an alkyl methacrylate or a mixture of styrene and an alkyl methacrylate; wherein the alkyl methacrylate is selected from the group consisting of methyl methacrylate, isodecyl methacrylate or stearyl methacrylate; 2. 28-34% by weight, based on the weight of the acrylic polymer, of an alkyl acrylate having 2-12 carbon atoms in the alkyl group; and
Claim 2
Dependent Claim
90 words
An acrylic polymer dispersant for dispersing pigments in aqueous acrylic paints consisting essentially of about 1. 46-62% by weight, based on the weight of acrylic polymer, of constituents selected from the group consisting of styrene, an alkyl methacrylate or a mixture of styrene and an alkyl methacrylate; wherein the alkyl methacrylate is selected from the group consisting of methyl methacrylate, isodecyl methacrylate or stearyl methacrylate; 2. 28-34% by weight, based on the weight of the acrylic polymer, of an alkyl acrylate having 2-12 carbon atoms in the alkyl group; and
Claim 3
Dependent Claim
41 words
10-20% by weight, based on the weight of the acrylic polymer, of acrylic acid or methacrylic acid; and wherein the acrylic polymer has a glass transition temperature of about -90°C to 70°C and a weight average molecular weight of about 500-30,000.
Claim 4
Dependent Claim
41 words
10-20% by weight, based on the weight of the acrylic polymer, of acrylic acid or methacrylic acid; and wherein the acrylic polymer has a glass transition temperature of about -90°C to 70°C and a weight average molecular weight of about 500-30,000.
Claim 5
Dependent Claim
52 words
The acrylic polymer dispersant of claim 1 in which the acrylic polymer consists essentially of 1. methyl methacrylate; 2. an alkyl acrylate; and 3. acrylic acid or methacrylic acid; and wherein the acrylic polymer has weight average molecular weight of about 4,000-8,000 and a glass transition temperature of about 10° to 70°C.
Claim 6
Dependent Claim
22 words
The acrylic polymer dispersant of claim 2 in which the acrylic polymer consists essentially of methyl methacrylate, butyl acrylate and acrylic acid.
Claim 7
Dependent Claim
22 words
The acrylic polymer dispersant of claim 2 in which the acrylic polymer consists essentially of isodecyl methacrylate, butyl acrylate and acrylic acid.
Claim 8
Dependent Claim
22 words
The acrylic polymer dispersant of claim 2 in which the acrylic polymer consists essentially of stearyl methacrylate, butyl acrylate and acrylic acid.
Claim 9
Dependent Claim
23 words
The acrylic polymer dispersant of claim 1 in which the acrylic polymer consists essentially of styrene, methyl methacrylate, butyl acrylate and acrylic acid.
Claim 10
Dependent Claim
35 words
A dispersion having a 5-80% solids content of an acrylic polymer dispersant of claim 1 and pigments in an organic medium; wherein the weight ratio of pigment to dispersant is about 1:100 to about 100:10.
Claim 11
Dependent Claim
12 words
The dispersion of claim 7 in which the pigment is iron oxide.
Claim 12
Dependent Claim
55 words
An aqueous dispersion having a 5-80% solids content of an acrylic polymer dispersant of claim 1 and pigments uniformly dispersed in an aqueous medium and containing sufficient amount of an organic basic compound or ammonia to provide a pH of about 7-10; wherein the pigment to dispersant weight ratio is about 1:100 to about 100:10.
Claim 13
Dependent Claim
106 words
In an aqueous paint composition of an acrylic film-forming polymer and a water dispersible crosslinking agent, the improvement used therewith consists essentially of 1-50% by weight, based on the weight of the paint composition, of an acrylic polymer dispersant consisting essentially of about 1. 46-62% by weight, based on the weight of the acrylic polymer of methyl methacrylate; 2. 28-34% by weight, based on the weight of the acrylic polymer, of butyl acrylate; and 3. 10-20% by weight, based on the weight of the acrylic polymer of acrylic acid; wherein the paint composition contains sufficient ammonium hydroxide or amine to provide a pH of about 7-10.
Claim 14
Dependent Claim
106 words
In an aqueous paint composition of an acrylic film-forming polymer and a water dispersible crosslinking agent, the improvement used therewith consists essentially of 1-50% by weight, based on the weight of the paint composition, of an acrylic polymer dispersant consisting essentially of about 1. 46-62% by weight, based on the weight of the acrylic polymer of methyl methacrylate; 2. 28-34% by weight, based on the weight of the acrylic polymer, of butyl acrylate; and 3. 10-20% by weight, based on the weight of the acrylic polymer of acrylic acid; wherein the paint composition contains sufficient ammonium hydroxide or amine to provide a pH of about 7-10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |