Patent US4138376A successfully refreshed from Google Patents.
US4138376A
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Coating compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-06-07
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Granted: 1979-02-06
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Expires: 1996-06-07
Abstract
Abstract Coating compositions comprise a blend of (1) a dispersion in an organic liquid comprising a major proportion of aliphatic hydrocarbon of particles of a polyisocyanate or adduct thereof insoluble in the organic liquid the dispersion being stabilized by a defined polymeric stabilizer and, (2) a solution in a solvent comprising a major proportion of aliphatic hydrocarbon of a material containing groups which are reactive with isocyanate groups contained in or yielded by the polyisocyanate of the dispersion.
Inventors
- 👤 Peter F. Nicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:15
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G18/703; C08G18/705
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
148 words
A coating composition which comprises a blend of: (1) a dispersion in an organic liquid comprising a major proportion of aliphatic hydrocarbon of particles of an adduct or prepolymer of an aliphatic or aromatic di- or triisocyanate insoluble in the organic liquid, the dispersion being stabilized by a polymeric stabilizer, one component of which is soluble in the organic liquid and another component of which is soluble in the disperse particles, each component having a molecular weight of at least 500, and the ratio of the total molecular weights of the individual components of the two types being in the range 3:1 to 1:3, and (2) a solution in a solvent comprising a major proportion of aliphatic hydrocarbon of a material containing groups selected from hydroxyl, primary and secondary amino, carboxyl and mercapto-groups which are reactive with the isocyanate groups contained in or yielded by the dispersion (1).
Claim 2
Dependent Claim
148 words
A coating composition which comprises a blend of: (1) a dispersion in an organic liquid comprising a major proportion of aliphatic hydrocarbon of particles of an adduct or prepolymer of an aliphatic or aromatic di- or triisocyanate insoluble in the organic liquid, the dispersion being stabilized by a polymeric stabilizer, one component of which is soluble in the organic liquid and another component of which is soluble in the disperse particles, each component having a molecular weight of at least 500, and the ratio of the total molecular weights of the individual components of the two types being in the range 3:1 to 1:3, and (2) a solution in a solvent comprising a major proportion of aliphatic hydrocarbon of a material containing groups selected from hydroxyl, primary and secondary amino, carboxyl and mercapto-groups which are reactive with the isocyanate groups contained in or yielded by the dispersion (1).
Claim 3
Dependent Claim
26 words
A coating composition according to claim 1 wherein the prepolymer or adduct is obtained by partially reacting a di- or triisocyanate with a hydroxyl group-containing compound.
Claim 4
Dependent Claim
17 words
A coating composition according to claim 1 wherein the polymeric stabilizer is a block or graft copolymer.
Claim 5
Dependent Claim
22 words
A coating composition according to claim 1 wherein each component of the polymeric stabilizer has a molecular weight of at least 1000.
Claim 6
Dependent Claim
37 words
A coating composition according to claim 1 wherein each component of the polymeric stabilizer is of the same or similar chemical type to the organic liquid or disperse particles respectively in which it is to be soluble.
Claim 7
Dependent Claim
23 words
A coating composition according to claim 1 wherein the component soluble in the disperse particles of di- or triisocyanate comprises an isocyanate-containing moiety.
Claim 8
Dependent Claim
19 words
A coating composition according to claim 1 wherein the component soluble in the organic liquid is aliphatic in character.
Claim 9
Dependent Claim
28 words
A coating composition according to claim 1 wherein there is present 1-10% by weight of stabilizer based on the weight of the dispersed particles of di- or triisocyanate.
Claim 10
Dependent Claim
28 words
A coating composition according to claim 8 wherein there is present 2-5% by weight of stabilizer based on the weight of the dispersed particles of di- or triisocyanate.
Claim 11
Dependent Claim
31 words
A coating composition according to claim 1 wherein the material containing groups reactive with isocyanate groups is selected from an aliphatic polyol, a polyhydroxyl group-containing polyester of an oil-modified alkyd resin.
Claim 12
Dependent Claim
37 words
A coating composition according to claim 1 wherein the relative proportions of the di- or triisocyanate and the material containing isocyanate-reactive groups are such that the NCO:isocyanate-reactive group molar ratio lies within the range 1:1 to 1:5.
Claim 13
Dependent Claim
18 words
A coating composition according to claim 11 wherein the molar ratio lies within the range 1:1 to 0.7:1.
Claim 14
Dependent Claim
21 words
A coating composition according to claim 1 which contains a catalyst for the reaction between isocyanate groups and groups reactive therewith.
References Cited (Backward Citations)
US3012987A
Cited
US3114734A
Cited
US3433753A
Cited
US3316189A
Cited
US3284539A
Cited
US3271352A
Cited
US3786010A
Cited
US3660355A
Cited
US3909466A
Cited
US3804787A
Cited
US3748294A
Cited
US3981947A
Cited
US3917741A
Cited
US3926875A
Cited
US3810855A
Cited
US3920597A
Cited
US4000218A
Cited
US3920595A
Cited
US4026850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |