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US3954705A
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Graft copolymers having an acid anhydride copolymer backbone
Assignee: EIDP Inc
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Filing: 1974-06-24
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Granted: 1976-05-04
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Expires: 1994-06-24
Abstract
Abstract Graft copolymers having A. a backbone component comprising a copolymer of 1. 0.1% to 20%, by weight of the total polymer, of a cyclic carboxylic acid anhydride of 4-7 carbon atoms, and 2. at least one other copolymerizable ethylenically unsaturated monomer; And B. at least one graft component comprising a polymer or copolymer of graft copolymerizable ethylenically unsaturated monomer(s), the graft component, as an entity, having an average solubility parameter of 7.5-9, Useful as aids in dispersing pigments.
Inventors
- 👤 Thomas A. Ashe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:35
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/006; C08; C08F; C08F257/00; C08F267/00; C08F267/04; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A pigment dispersion consisting essentially of A. a graft copolymer having 1. a backbone component comprising a copolymer of a. 0.1%-20%, by weight of the total polymer, of a cyclic carboxylic acid anhydride of 4-7 carbon atoms, and b. styrene or substituted styrene; and 2.
Claim 2
Dependent Claim
45 words
A pigment dispersion consisting essentially of A. a graft copolymer having 1. a backbone component comprising a copolymer of a. 0.1%-20%, by weight of the total polymer, of a cyclic carboxylic acid anhydride of 4-7 carbon atoms, and b. styrene or substituted styrene; and 2.
Claim 3
Dependent Claim
45 words
at least one graft component comprising a polymer of a. an ester of acrylic acid or methacrylic acid with an alkanol of 1-24 carbon atoms; b. a vinyl ester of a carboxylic acid of 3-36 carbon atoms; or c. vinyl acetate; B. a pigment; and
Claim 4
Dependent Claim
45 words
at least one graft component comprising a polymer of a. an ester of acrylic acid or methacrylic acid with an alkanol of 1-24 carbon atoms; b. a vinyl ester of a carboxylic acid of 3-36 carbon atoms; or c. vinyl acetate; B. a pigment; and
Claim 5
Dependent Claim
38 words
C. a non-reactive liquid carrier. 2. The dispersion of claim 1 wherein the backbone of the graft copolymer in (A) bears one or more free pendant carboxyl groups, amide groups, acid salt groups, amino groups or ester groups.
Claim 6
Dependent Claim
16 words
The dispersion of claim 1 wherein the cyclic anhydride in (A) (1) (a) is maleic anhydride.
Claim 7
Dependent Claim
20 words
The composition of claim 3 wherein the ethylenically unsaturated monomers in (A) (2) (a) are methyl methacrylate and 2-ethylhexyl acrylate.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the pigment is a hydrous iron oxide.
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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |