Patent US4447499A successfully refreshed from Google Patents.
US4447499A
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Method of coating substrates with polydiorganosiloxanes having lower alkyl substituents to provide release coatings
Assignee: Dow Silicones Corp
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Filing: 1983-05-09
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Granted: 1984-05-08
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Expires: 2003-05-09
Abstract
Abstract Adhesive-releasing silicone coatings are provided for substrates by applying a composition consisting essentially of a polydiorganosiloxane substituted with methyl, ethyl, propyl, or hydroxyl radicals and an ultraviolet radiation photosensitizer to a substrate, and exposing the applied solution to ultraviolet radiation. By the method of this invention said polydiorganosiloxanes can be crosslinked on substrates to furnish, e.g., adhesive-releasing coatings on paper.
Inventors
- 👤 Terence J. Swihart
- 👤 Maris J. Ziemelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:58
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C; C09; C09D; C09D183/00; C09D183/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
188 words
A method for coating a substrate with a polydiorganosiloxane to provide a coating upon said substrate, said method comprising (A) applying to said substrate a coating composition consisting essentially of (1) 100 parts by weight of polydiorganosiloxane having a viscosity of from about 1.0×10 -4 m 2 /second to about 1.0×10 -2 m 2 /second, said polydiorganosiloxane being selected from the group consisting of polydiorganosiloxanes having the formula R 3 SiO(MeQSiO) x (Me 2 SiO) y SiR 3 , wherein Q is a radical selected from the group consisting of ethyl and propyl radicals, R is a radical selected from the group consisting of Q radicals, methyl radicals, and hydroxyl radicals, Me represents the methyl radical, x has an average value of 0 or more, and y has an average value of 0 or more, there being at least two radicals selected from Q radicals and hydroxyl radicals in the polydiorganosiloxane, and (2) 0.1 to 10 parts by weight of an ultraviolet radiation photosensitizer soluble in said polydiorganosiloxane, and (B) exposing the applied coating composition to an amount of ultraviolet radiation sufficient to cure said applied coating composition.
Claim 2
Independent Claim
188 words
A method for coating a substrate with a polydiorganosiloxane to provide a coating upon said substrate, said method comprising (A) applying to said substrate a coating composition consisting essentially of (1) 100 parts by weight of polydiorganosiloxane having a viscosity of from about 1.0×10 -4 m 2 /second to about 1.0×10 -2 m 2 /second, said polydiorganosiloxane being selected from the group consisting of polydiorganosiloxanes having the formula R 3 SiO(MeQSiO) x (Me 2 SiO) y SiR 3 , wherein Q is a radical selected from the group consisting of ethyl and propyl radicals, R is a radical selected from the group consisting of Q radicals, methyl radicals, and hydroxyl radicals, Me represents the methyl radical, x has an average value of 0 or more, and y has an average value of 0 or more, there being at least two radicals selected from Q radicals and hydroxyl radicals in the polydiorganosiloxane, and (2) 0.1 to 10 parts by weight of an ultraviolet radiation photosensitizer soluble in said polydiorganosiloxane, and (B) exposing the applied coating composition to an amount of ultraviolet radiation sufficient to cure said applied coating composition.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the polydiorganosiloxane is hydroxy endblocked polydimethylsiloxane.
Claim 4
Dependent Claim
27 words
The method of claim 2 wherein the coating composition contains, additionally, 0.1 to 250 parts by weight of an organosiloxane containing one or more silicon-bonded vinyl radical.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein Q denotes the ethyl radical, and wherein the polydiorganosiloxane contains at least two ethyl radicals.
Claim 6
Dependent Claim
27 words
The method of claim 4 wherein the coating composition contains, additionally, 0.1 to 250 parts by weight of an organosiloxane containing one or more silicon-bonded vinyl radicals.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein Q denotes the propyl radical, and wherein the polydiorganosiloxane contains at least two propyl radicals.
Claim 8
Dependent Claim
27 words
The method of claim 6 wherein the coating composition contains, additionally, 0.1 to 250 parts by weight of an organosiloxane containing one or more silicon-bonded vinyl radical.
Claim 9
Dependent Claim
10 words
The method of claim 1 wherein the substrate is paper.
Claim 10
Dependent Claim
10 words
The method of claim 2 wherein the substrate is paper.
Claim 11
Dependent Claim
10 words
The method of claim 3 wherein he substrate is paper.
Claim 12
Dependent Claim
10 words
The method of claim 4 wherein the substrate is paper.
Claim 13
Dependent Claim
10 words
The method of claim 5 wherein the substrate is paper.
Claim 14
Dependent Claim
10 words
The method of claim 6 wherein the substrate is paper.
Claim 15
Dependent Claim
10 words
The method of claim 7 wherein the substrate is paper.
Claim 16
Dependent Claim
9 words
Coated paper obtained by the method of claim 8.
Claim 17
Dependent Claim
9 words
Coated paper obtained by the method of claim 9.
Claim 18
Dependent Claim
9 words
Coated paper obtained by the method of claim 11.
Claim 19
Dependent Claim
9 words
Coated paper obtained by the method of claim 13.
Claim 20
Dependent Claim
12 words
The method of claim 1 wherein the substrate is a polymeric film.
Claim 21
Dependent Claim
12 words
The method of claim 2 wherein the substrate is a polymeric film.
Claim 22
Dependent Claim
12 words
The method of claim 3 wherein the substrate is a polymeric film.
Claim 23
Dependent Claim
12 words
The method of claim 4 wherein the substrate is a polymeric film.
Claim 24
Dependent Claim
12 words
The method of claim 5 wherein the substrate is a polymeric film.
Claim 25
Dependent Claim
12 words
The method of claim 6 wherein the substrate is a polymeric film.
Claim 26
Dependent Claim
12 words
The method of claim 7 wherein the substrate is a polymeric film.
Claim 27
Dependent Claim
11 words
A coated polymeric film obtained by the method of claim 19.
Claim 28
Dependent Claim
11 words
A coated polymeric film obtained by the method of claim 20.
Claim 29
Dependent Claim
11 words
A coated polymeric film obtained by the method of claim 22.
Claim 30
Dependent Claim
11 words
A coated polymeric film obtained by the method of claim 24.
References Cited (Backward Citations)
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US3726710A
Cited
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Cited
US4052529A
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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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |