US4301054A
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US
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Thermographic cholesteric coating compositions
Assignee: Thermal Imagery Inc
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Filing: 1979-06-04
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Granted: 1981-11-17
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Expires: 1999-06-04
Abstract
Abstract Thermographic cholesteric coating compositions, containing cholesteric microcapsules, and coated plates are provided which give gray-red-green-blue coated temperature-responsive visual displays, over about a 3° or 4° C. range. Formulations are devised to give the displayed range, in about 1° C. intervals from about 28° C. to about 37° C. The microcapsules contain about 55% oleyl cholesteryl carbonate, about 2.0 to about 5.0% cholesteryl propionate and about 4.5 to about 7.2% of cholesteryl chloride. Coatings containing two different microencapsulated formulations, both selected within the above formulation range give thermographic plates showing a temperature-responsive visual display of seven distinct color shades, over about a 4°-7° C. range, without loss of sensitivity and without loss of noticeable color intensity.
Inventors
- 👤 William L. Buirley
- 👤 Donald E. Koopman
- 👤 David B. McQuain
- 👤 William H. Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:31
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/26; G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01K11/165; G01K13/00; G01K13/20; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
An aqueous coating composition comprising: (a) a polymeric, film-forming binder material and (b) microcapsules having transparent wall material, and having core material consisting essentially of about 55 to about 75% of cholesteryl pelargonate, about 14 to about 35% of oleyl cholesteryl carbonate, about 2.0 to about 6.0% of cholesteryl propionate and about 4.5 to about 7.2% of cholesteryl chloride.
Claim 2
Dependent Claim
59 words
An aqueous coating composition comprising: (a) a polymeric, film-forming binder material and (b) microcapsules having transparent wall material, and having core material consisting essentially of about 55 to about 75% of cholesteryl pelargonate, about 14 to about 35% of oleyl cholesteryl carbonate, about 2.0 to about 6.0% of cholesteryl propionate and about 4.5 to about 7.2% of cholesteryl chloride.
Claim 3
Dependent Claim
16 words
The aqueous coating composition of claim 1, wherein the microcapsules are single-droplet microcapsules of uniform size.
Claim 4
Dependent Claim
19 words
The aqueous coating composition of claim 2 in which the microcapsules are 30 to 50 microns in average diameter.
Claim 5
Dependent Claim
31 words
The coating composition of claim 1, wherein the core material consists essentially of about 65-75% cholesteryl pelargonate, about 14-22% oleyl cholesteryl carbonate, about 4.5-6.0% cholesteryl propionate and about 6.2-7.2% cholesteryl chloride.
Claim 6
Dependent Claim
59 words
The coating composition of claim 4, comprising about equal parts of two kinds of microcapsules, differing in core material compositions, wherein the first kind of microcapsule has core material about 2.4 to about 4.7% richer in cholesteryl pelargonate and about 3.3 to about 4.7% poorer in oleyl cholesteryl carbonate than the core material of the second kind of microcapsule.
Claim 7
Dependent Claim
33 words
The coating composition of claim 1, wherein the core material consists essentially of about 55-67% cholesteryl pelargonate, about 25-35% oleyl cholesteryl carbonate, about 2.0-2.8 cholesteryl propionate and about 4.5 to 5.5 cholesteryl cloride.
Claim 8
Dependent Claim
59 words
The coating composition of claim 6, comprising about equal parts of two kinds of microcapsules, different in core material compositions, wherein the first kind of microcapsule has core material about 1.5 to about 3.1% richer in cholesteryl pelargonate and about 0.8 to about 3.5% poorer in oleyl cholesteryl carbonate than the core material of the second kind of microcapsule.
Claim 9
Dependent Claim
21 words
The coating composition of claim 1, wherein the binder material is polyvinyl alcohol and the microcapsule wall material is urea-formaldehyde resin.
Claim 10
Dependent Claim
76 words
The coating composition of claim 4 wherein the selected microcapsule core material composition is one or two of the following: ______________________________________
% Oleyl
% Cholesteryl
Cholesteryl
% Cholesteryl
% Cholesteryl
Pelargonate
Carbonate Propionate Chloride
______________________________________
(a) 66.4 21.6 5.5 6.5
(b) 66.5 22.0 4.6 6.9
(c) 68.0 20.3 4.7 7.0
(d) 70.0 18.3 4.7 7.0
(e) 71.0 17.3 4.7 7.0
(f) 72.7 15.6 4.7 7.0
(g) 73.2 15.0 5.4 6.4
(h) 73.4 14.5 5.6 6.5
______________________________________
Claim 11
Dependent Claim
22 words
The coating composition of claim 9 wherein the selected microcapsule core material is one of compositions (b), (c), (d), (e), and (f).
Claim 12
Dependent Claim
36 words
The coating composition of claim 9 wherein two microcapsule core materials are used in about equal portions, selected as follows: (a) and (d), (b) and (e), (c) and (f), (d) and (g) or (e) and (h).
Claim 13
Dependent Claim
40 words
The coating composition of claim 9 wherein two microcapsule core materials are used in unequal portions, up to a 70-30 ratio selected as follows: (a) and (d), (b) and (e), (c) and (f), (d) and (g) or (e) and (h).
Claim 14
Dependent Claim
70 words
The coating composition of claim 7 wherein the selected microcapsule core material is one or two of the following: ______________________________________
% Oleyl
% Cholesteryl
Cholesteryl
% Cholesteryl
% Cholesteryl
Pelargonate
Carbonate Propionate Chloride
______________________________________
(a) 58.5 33.9 2.4 5.2
(b) 60.7 31.5 2.4 5.4
(c) 61.2 31.5 2.5 4.8
(d) 62.2 30.7 2.1 5.0
(e) 63.5 29.2 2.2 5.1
(f) 65.3 27.2 2.6 4.9
(g) 66.3 26.2 2.6 4.9
______________________________________
Claim 15
Dependent Claim
36 words
The coating composition of claim 13, wherein two microcapsule core materials are used in about equal portions, selected as follows: (a) and (c), (b) and (d), (c) and (e), (d) and (f) or (e) and (g).
Claim 16
Dependent Claim
40 words
The coating composition of claim 13, wherein two microcapsule core materials are used in unequal portions, up to a 70-30 ratio, selected as follows: (a) and (c), (b) and (d), (c) and (e), (d) and (f) or (e) and (g).
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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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |