US4741778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal control coating composition
Assignee: NTT Inc
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Filing: 1987-03-13
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Granted: 1988-05-03
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Expires: 2007-03-13
Abstract
Abstract A thermal control coating composition comprising a binder made of a condensation polymerization product of Si-(OR)4 added with titanium oxide acting as a white pigment, common mica particles for improving resistance to thermal cycling and cerium oxide particles for improving the resistance to UV irradiation. The thermal control coating composition has an initial solar absorptance ( alpha s) of not more than 0.3 and an initial thermal emittance ( epsilon ) of not less than 0.8. The coating composition exhibits excellent properties when subjected to an ageing test corresponding to the use thereof on a standstill orbit for 10 years. The weight of the paint may be reduced by the use of the coating composition of the invention such that an antenna (having a diameter of 3.5 m) of a large capacity communications satellite is coated with 3 kg of the coating composition of the invention to form a durable coating comparable to a coating formed by using 6 kg of a conventional thermal control paint.
Inventors
- 👤 Toshio Horie
- 👤 Yoshinori Hasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:03
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/02; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C09D183/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A thermal control coating composition comprising: a binder made of a high molecular weight condensation polymerization product of a compounds and oligomers thereof, the silicon compounds being represented byt the following general formula (1) of: ##STR4## wherein R may be the same or different groups and each stands for an aliphatic hydrocarbon group having 1 to 8 carbon atoms or a phenyl group; 100 to 300 parts by weight, based on 100 parts by weight of said binder, of common rica particle having an average particle size of not more than 40 μm; 50to 200 parts by weight, based on 100 parts by weight of said binder, of titanium oxide particle having an average particle size of not more than 1 μm; and 50 to 200 parts by weight, based on 100 parts by weight of said binder, of cerium oxide particle having an average particle size of not more than 40 μm.
Claim 2
Dependent Claim
153 words
A thermal control coating composition comprising: a binder made of a high molecular weight condensation polymerization product of a compounds and oligomers thereof, the silicon compounds being represented byt the following general formula (1) of: ##STR4## wherein R may be the same or different groups and each stands for an aliphatic hydrocarbon group having 1 to 8 carbon atoms or a phenyl group; 100 to 300 parts by weight, based on 100 parts by weight of said binder, of common rica particle having an average particle size of not more than 40 μm; 50to 200 parts by weight, based on 100 parts by weight of said binder, of titanium oxide particle having an average particle size of not more than 1 μm; and 50 to 200 parts by weight, based on 100 parts by weight of said binder, of cerium oxide particle having an average particle size of not more than 40 μm.
Claim 3
Dependent Claim
28 words
The coating composition according to claim 1, wherein R in said general formula (1) is at least one selected from the group consisting of methyl, ethyl and phenyl.
Claim 4
Dependent Claim
21 words
The coating composition according to claim 1, wherein the degree of condensation polymerization of said oligomer is not more than 10.
Claim 5
Dependent Claim
64 words
The coating composition according to claim 1, wherein said high molecular weight condensation product is prepared by hydrolyzing at least one compound represented by said general formula (1) or an oligomer thereof in the presence of an acid catalyst, and then polymerizing the hydrolyzed compound or ligomer by condensation while adjusting the pH value of the reaction system to not less than pH 7.
Claim 6
Dependent Claim
36 words
The coating composition according to claim 1, wherein said common mica particle has an average particle size of not more than 15 μm, and is added in an amount of 150 to 250 parts by weight.
Claim 7
Dependent Claim
37 words
The coating composition according to claim 1, wherein said titanium oxide particle has an average particle size of from 0.1 to 0.5 μm, and is added in an amount of from 100 to 150 parts by weight.
Claim 8
Dependent Claim
37 words
The coating composition according to claim 1, wherein said cerium oxide particle has an average particle size of not more than 15 μm, and is added in an amount of from 75 to 150 parts by weight.
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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |