Patent US4232135A successfully refreshed from Google Patents.
US4232135A
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Coating compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1978-12-26
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Granted: 1980-11-04
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Expires: 1998-12-26
Abstract
Abstract A coating composition is provided in which the film-forming material consists of (a) 30-85% by volume of disperse phase particles of size 0.01-20 microns, of which not less than 50% are polymer microparticles, stably dispersed in (b) 70-15% by volume of a liquid continuous phase which is capable of curing by a condensation polymerization reaction, the total volume of components (a) and (b) being 100% and the disperse phase being capable of taking part in the curing reaction. The composition can have a very high solids content and makes possible the production of thick films free from surface shrinkage.
Inventors
- 👤 John Bentley
- 👤 Morice W. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:48
CPC Classifications
C; C09; C09D; C09D167/00; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/40; C08G63/42; C08G63/46; C08G63/48; C09D7/00; C09D7/40; C09D7/45; C09D7/80; C08L; C08L67/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A coating composition in which the film-forming material consists of: (a) from 30% to 85% by volume of disperse phase consisting of particles having a size or size distribution in the range 0.01-20 microns, not less than 50% by volume of those particles being polymer microparticles, and the disperse phase being in a state of stable dispersion in (b) from 70% to 15% by volume of a liquid continuous phase which is capable of curing to a film-forming polymeric material by means of a condensation polymerisation reaction, the said state of stable dispersion being a substantially de-floculated, sterically stabilised state achieved by means of a dispersing agent the molecule of which contains a polymeric component which is solvatable by the continuous phase liquid and another component which is relatively non-solvated thereby and is capable of associating with the surface of the microparticles, the total volume of components (a) and (b) being 100% and the disperse phase being capable of taking part in the said condensation polymerisation reaction.
Claim 2
Dependent Claim
167 words
A coating composition in which the film-forming material consists of: (a) from 30% to 85% by volume of disperse phase consisting of particles having a size or size distribution in the range 0.01-20 microns, not less than 50% by volume of those particles being polymer microparticles, and the disperse phase being in a state of stable dispersion in (b) from 70% to 15% by volume of a liquid continuous phase which is capable of curing to a film-forming polymeric material by means of a condensation polymerisation reaction, the said state of stable dispersion being a substantially de-floculated, sterically stabilised state achieved by means of a dispersing agent the molecule of which contains a polymeric component which is solvatable by the continuous phase liquid and another component which is relatively non-solvated thereby and is capable of associating with the surface of the microparticles, the total volume of components (a) and (b) being 100% and the disperse phase being capable of taking part in the said condensation polymerisation reaction.
Claim 3
Dependent Claim
69 words
A composition as claimed in claim 1, wherein the disperse phase particles are stably dispersed in the continuous phase liquid by means of a graft copolymer dispersing agent comprising a polymer backbone which is not solvated by the continuous phase liquid and is capable of becoming anchored to the polymer microparticles and a plurality of polymer chains pendant from the backbone which are solvatable by the continuous phase liquid.
Claim 4
Dependent Claim
43 words
A composition as claimed in claim 1, wherein the stable dispersion of the polymer microparticles is obtained by dispersion polymerisation of suitable monomers in the presence of the dispersing agent, in a volatile, inert organic liquid in which the microparticles produced are insoluble.
Claim 5
Dependent Claim
17 words
A composition as claimed in claim 1, wherein the polymer microparticles are composed of a crosslinked polyester.
Claim 6
Dependent Claim
21 words
A composition as claimed in claim 1, wherein the film-forming material present in the continuous phase liquid comprises a melamine-formaldehyde resin.
Claim 7
Dependent Claim
60 words
A composition as claimed in claim 1, wherein the continuous phase liquid contains, in addition to the film-forming material, one or more reactive liquid constituents which are not in themselves capable of curing by a condensation polymerisation reaction but are compatible with the said film-forming material and contain groups which can participate in the curing thereof by the said reaction.
Claim 8
Dependent Claim
32 words
A composition as claimed in claim 6, wherein the continuous phase liquid comprises mainly a melamine-formaldehyde resin and the reactive liquid is a relatively low molecular weight compound containing free hydroxyl groups.
Claim 9
Dependent Claim
59 words
A composition as claimed in claim 1, wherein the continuous phase of the composition is obtained by the admixture, shortly before the composition is to be applied to a substrate, of two liquid constituents which are mutually reactive to form a film by means of a condensation polymerisation reaction but which are not individually capable of curing and film-formation.
Claim 10
Dependent Claim
22 words
A composition as claimed in claim 1, wherein the continuous phase liquid has a viscosity in the range 0.1 to 25 poise.
Claim 11
Dependent Claim
61 words
A composition as claimed in claim 1, wherein, in addition to the disperse phase (a) and the liquid continuous phase (b), there is present up to 30% by weight, based on the total composition, of an inert liquid diluent which is a solvent for the continuous phase and which volatilises under the conditions of application of the composition to a substrate.
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |