US4059547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paint manufacture
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-05-23
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Granted: 1977-11-22
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Expires: 1995-05-23
Abstract
Abstract A pigment dispersant suitable for use in making a series of paints, the dispersant being a copolymer of defined proportions of ethylenically unsaturated monomers containing hydroxy and/or amide groups, straight or branched chain alkyl groups of from 7 to 22 carbon atoms and optionally also groupings which can promote association of the copolymer with a pigment surface. A millbase made with the aid of such a dispersant can be combined in either loading or tinting operations with a wide range of different film-forming polymers.
Inventors
- 👤 Derek Norman Alfred Speakman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:53
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62; C09; C09D; C09D7/00; C09D7/40; C09D7/45
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
200 words
A pigment dispersion suitable for use in making a series of paints comprising a pigment, an organic liquid and a pigment dispersant which is a copolymer comprising units derived from the following ethylenically unsaturated monomers in the stated proportions by weight based on the total weight of the copolymer: a. 0-50% of a hydroxy group-containing monomer, and/or b. 0-20% of an amide group-containing monomer, provided that there is always present at least 5% of (a) or (b); c. 20-80% of a monomer free from carboxyl groups and containing a straight or branched chain alkyl group of from 7 to 22 carbon atoms, and d. a component containing one or more monomers free from the groups mentioned in (a), (b), or (c), said component including as an essential constituent up to 20% based on the total weight of the copolymer of a comonomer containing an epoxide group, said epoxide group having been reacted with a compound bearing a carboxyl group and a pigment dispersant group and having the formula Ar ##STR3## where Ar is an aromatic group and n is 1 or 0, the total amount of said component (d) being up to 50% and the total of monomers being 100%.
Claim 2
Dependent Claim
200 words
A pigment dispersion suitable for use in making a series of paints comprising a pigment, an organic liquid and a pigment dispersant which is a copolymer comprising units derived from the following ethylenically unsaturated monomers in the stated proportions by weight based on the total weight of the copolymer: a. 0-50% of a hydroxy group-containing monomer, and/or b. 0-20% of an amide group-containing monomer, provided that there is always present at least 5% of (a) or (b); c. 20-80% of a monomer free from carboxyl groups and containing a straight or branched chain alkyl group of from 7 to 22 carbon atoms, and d. a component containing one or more monomers free from the groups mentioned in (a), (b), or (c), said component including as an essential constituent up to 20% based on the total weight of the copolymer of a comonomer containing an epoxide group, said epoxide group having been reacted with a compound bearing a carboxyl group and a pigment dispersant group and having the formula Ar ##STR3## where Ar is an aromatic group and n is 1 or 0, the total amount of said component (d) being up to 50% and the total of monomers being 100%.
Claim 3
Dependent Claim
25 words
A dispersion as claimed in claim 1 in which the dispersant copolymer comprises both a hydroxy group-containing monomer (a) and an amide group-containing monomer (b).
Claim 4
Dependent Claim
28 words
A dispersion as claimed in claim 1 wherein the hydroxy group-containing monomer is selected from the group consisting of hydroxyethyl acrylate, hydroxyisopropyl acrylate, hydroxyethyl methacrylate and hydroxyisopropyl methacrylate.
Claim 5
Dependent Claim
22 words
A dispersion as claimed in claim 1 wherein the amide group-containing monomer is selected from the group consisting of acrylamide and methacrylamide.
Claim 6
Dependent Claim
29 words
A dispersion as claimed in claim 1 wherein the comonomer (c) is an alkyl acrylate or methacrylate in which the alkyl group contains from 7 to 22 carbon atoms.
Claim 7
Dependent Claim
39 words
A dispersion as claimed in claim 1 wherein the comonomer (d) is selected from the group consisting of alkyl acrylates and methacrylates in which the alkyl group contains from 1 to 6 carbon atoms, styrene vinyl toluene and acrylonitrile.
Claim 8
Dependent Claim
56 words
A dispersion as claimed in claim 1 wherein the dispersant copolymer comprises a. 15-30% of a hydroxy alkyl methacrylate, or corresponding acrylate, e.g. where alkyl is ethyl, propyl, isopropyl or butyl, b. 1-10% of acrylamide or methacrylamide, c. 20-80% of C 7 or higher alkyl acrylate or methacrylate, and d. 10-50% of styrene or vinyl toluene.
Claim 9
Dependent Claim
39 words
A dispersion as claimed in claim 1 wherein there is incorporated in said dispersant copolymer not more than 20% based on the total weight of the copolymer of a comonomer (d) which contains a group having pigment dispersant characteristics.
Claim 10
Dependent Claim
18 words
A dispersion as claimed in claim 1, wherein the compound is selected from p-aminobenzoic acid and p-nitrobenzoic acid.
Claim 11
Dependent Claim
36 words
A method of manufacturing paint which comprises combining the dispersion of claim 20 with a film-forming polymer selected from the group consisting of alkyd/melamine-formaldehyde blends, thermosetting acyrlic/epoxy blends, thermosetting acrylic/melamine-formaldehyde blends, nitrocellulose and acrylic lacquer-type polymers.
Claim 12
Dependent Claim
10 words
A paint manufactured according to the method of claim 10.
Claim 13
Dependent Claim
19 words
A paint as set forth in claim 11 wherein said film-forming polymer is a different polymer from said disperant.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |