Patent US3708324A successfully refreshed from Google Patents.
US3708324A
Expired / Lapsed
US
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Method of growing silicone elastomer
Assignee: Dow Silicones Corp
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Filing: 1970-06-01
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Granted: 1973-01-02
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Expires: 1990-06-01
Abstract
Abstract Silicone rubber is grown on a substrate by placing a substrate having a curing catalyst on the surface in contact with an uncatalyzed silicone elastomer composition for a time sufficient to grow silicone elastomer and then removing the substrate from the uncatalyzed silicone elastomer composition. This method is useful in coating substrates with silicone elastomer and in making silicone elastomer devices.
Inventors
- 👤 L Stebleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:33
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/14; C08G77/16; C08G77/18; C08G77/20; C08J2383/00; C08J2383/04; H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
116 words
A method of growing silicone elastomer on a substrate comprising , coating the substrate with a thin coat of an uncatalyzed organosiloxane elastomer composition, B. applying a curing catalyst for the uncatalyzed organo-siloxane elastomer composition to the surface of the coated substrate of (A), wherebY curing catalyst diffuses into and adheres to the thin coat of the uncatalyzed organosiloxane elastomer composition on the substrate, C. placing the coated substrate resulting from (B) in an organic solvent dispersion of an uncatalyzed organo-siloxane elastomer composition for a time sufficient to grow organosiloxane elastomer on the surface of the coated substrate, and thereafter D. removing the coated substrate from the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition.
Claim 2
Independent Claim
139 words
A method of growing silicone elastomer on a substrate comprising A. dipping the substrate in an organic solvent dispersion of an uncatalyzed organosiloxane elastomer composition whereby a thin coating of the uncatalyzed organosiloxane elastomer composition is formed on the surface of the substrate, B. applying a curing catalyst for the uncatalyzed organo-siloxane elastomer composition to the surface of the coated substrate resulting from (A), whereby curing catalyst diffuses into and adheres to the thin coat of the uncatalyzed organosiloxane elastomer composition on the substrate, thereafter C. placing the coated substrate resulting from (B) in an organic solvent dispersion of an uncatalyzed organosiloxane elastomer composition for at least one minute whereby an organosiloxane elastomer grows on the surface of the coated substrate, and thereafter D. removing the coated substrate from the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition.
Claim 3
Independent Claim
154 words
A method of growing silicone elastomer on a substrate comprising A. dipping the substrate in an organic solvent dispersion of an uncatalyzed organosiloxane elastomer composing whereby a thin coating of the uncatalyzed organosiloxane elastomer composition is formed on the surface of the substrate, B. dipping the substrate which is coated with a thin coat of the uncatalyzed organosiloxane elastomer composition in an organic solvent solution of a curing catalyst for the uncatalyzed organosiloxane elastomer composition, whereby curing catalyst diffuses into and adheres to the thin coat of the uncatalyzed organosiloxane elastomer composition on the substrate, thereafter C. placing the coated substrate resulting from (B) in an organic solvent dispersion of an uncatalyzed organosiloxane elastomer composition for at least one minute whereby an organosiloxane elastomer grows on the surface of the catalyst-containing thin coat on the substrate, and thereafter D. removing the coated substrate from the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition.
Claim 4
Dependent Claim
36 words
The method in accordance with claim 4 in which the coated substrate after (B) and before (C) is exposed to an atmosphere of air, nitrogen, carbon dioxide, organic solvent or helium for at least 30 seconds.
Claim 5
Dependent Claim
13 words
The method in accordance with claim 5 in which the atmosphere is air.
Claim 6
Dependent Claim
14 words
The method in accordance with claim 5 in which the atmosphere is organic solvent.
Claim 7
Dependent Claim
20 words
The method in accordance with claim 4 in which all the steps are carried out in an organic solvent atmosphere.
Claim 8
Dependent Claim
25 words
The method in accordance with claim 4 in which the coated substrate resulting from (D) is dipped in the catalyst solution as defined in (B).
Claim 9
Dependent Claim
45 words
The method in accordance with claim 9 in which the coated substrate resulting from (D) after the dip in the catalyst solution as defined in claim 9 is exposed to an organic solvent atmosphere for at least one minute and thereafter exposed to curing conditions.
Claim 10
Dependent Claim
18 words
The method in accordance with claim 10 in which the cured organosiloxane elastomer is removed from the substrate.
Claim 11
Dependent Claim
13 words
The method in accordance with claim 9 in which the product is cured.
Claim 12
Dependent Claim
18 words
The method in accordance with claim 12 in which the cured organosiloxane elastomer is removed from the substrate.
Claim 13
Dependent Claim
32 words
The method in accordance with claim 9 in which the coated substrate resulting from (D) is exposed to an air atmospherE for at least one minute before dipping in the catalyst solution.
Claim 14
Dependent Claim
33 words
The method in accordance with claim 14 in which the exposure to the air atmosphere is continued until the coated substrate is essentially free of organic solvent before dipping in the catalyst solution.
Claim 15
Dependent Claim
18 words
The method in accordance with claim 14 in which the silicone elastomer grown on a substrate is cured.
Claim 16
Dependent Claim
46 words
The method in accordance with claim 4 in which at least one of the uncatalyzed organosiloxane elastomer compositions consists essentially of a polydiorganosiloxane having terminal radicals selected from the group consisting of hydroxyl radicals and alkoxy radicals and a cross-linking agent which is a silicon compound.
Claim 17
Dependent Claim
26 words
The method in accordance with claim 17 in which the cross-linking agent is selected from the group consisting of alkoxy silicon compounds and organohydrogen silicon compounds.
Claim 18
Dependent Claim
25 words
The method in accordance with claim 18 in which cross-linking agent also is present in the organic solvent solution of the curing catalyst in (B).
Claim 19
Dependent Claim
31 words
The method in accordance with claim 18 in which the polydiorganosiloxane is a hydroxyl terminated polydimethylsiloxane, the silicon compound is an alkoxy silane and the curing catalyst is a tin carboxylate.
Claim 20
Dependent Claim
19 words
The method in accordance with claim 20, in which the organic solvent solution of tin carboxylate also contains alkoxysilane.
Claim 21
Dependent Claim
26 words
The method in accordance with claim 21 in which the substrate is selected from the group consisting of glass, metal, paper, rubber, resin, wood and ceramic.
Claim 22
Dependent Claim
13 words
The method in accordance with claim 22 in which the substrate is glass.
Claim 23
Dependent Claim
14 words
The method in accordance with claim 23 in which the glass is glass cloth.
Claim 24
Dependent Claim
13 words
The method in accordance with claim 22 in which the substrate is metal.
Claim 25
Dependent Claim
22 words
The method in accordance with claim 22 in which the metal is elected from the group consisting of copper, aluminum and steel.
Claim 26
Dependent Claim
14 words
The method in accordance with claim 26 in which the substrate is a screen.
Claim 27
Dependent Claim
25 words
The method in accordance with claim 17 in which cross-linking agent also is present in the organic solvent solution of the curing catalyst in (B).
Claim 28
Dependent Claim
22 words
The method in accordance with claim 17 wherein a filler is present in at least one of the uncatalyzed organosiloxane elastomer compositions.
Claim 29
Dependent Claim
59 words
The method in accordance with claim 4 in which at least one of the uncatalyzed organosiloxane elastomer compositions consists essentially of a polydiorganosiloxane having terminal radicals selected from the group consisting of hydroxyl radicals and triorganosiloxy radicals and having at least two vinyl radicals per molecule, and cross-linking organosilicon compounds having at least two silicon-bonded hydrogen atoms per molecule.
Claim 30
Dependent Claim
36 words
The method in accordance with claim 4 wherein the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition of (A) is the same as the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition of (C).
Claim 31
Dependent Claim
37 words
The method in accordance with claim 4 wherein the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition of (A) is not the same as the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition of (C).
Claim 32
Dependent Claim
36 words
The method in accordance with claim 4 wherein after (D), steps (B), (C) and (D) are repeated whereby a substantial increase in the thickness of the organosiloxane elastomer is obtained on the surface of the substrate.
Claim 33
Dependent Claim
27 words
The method in accordance with claim 33 wherein after (D) and before (B) the coated substrate is exposed to an air atmosphere for at least one minute.
Claim 34
Dependent Claim
32 words
The method in accordance with claim 4 wherein a release agent is applied to the surface of the substrate before (A) whereby the organosiloxane elastomer can be readily removed from the substrate.
Claim 35
Dependent Claim
13 words
The method in accordance with claim 35 in which the produce is cured.
Claim 36
Dependent Claim
17 words
The method in accordance with claim 36 in which the organosiloxane elastomer is remOved from the substrate.
Claim 37
Dependent Claim
14 words
The method in accordance with claim 4 wherein the product of (D) is cured.
Claim 38
Dependent Claim
18 words
The method in accordance with claim 38 in which the cured organosiloxane elastomer is removed from the substrate.
Claim 39
Dependent Claim
17 words
The method in accordance with claim 4 in which the organic solvent dispersion in (C) is vibrated.
Claim 40
Dependent Claim
54 words
The method in accordance with claim 40 in which the organic solvent dispersion in (C) is vibrated during the placing of the coated substrate in the organic solvent dispersion and during the removal therefrom, there being no vibration of the organic solvent dispersion when the coated substrate is stationary in the organic solvent dispersion.
Claim 41
Dependent Claim
14 words
The method in accordance with claim 41 wherein a product of (D) is cured.
Claim 42
Dependent Claim
24 words
The method of claim 4 in which the substrate is selected from a group consisting of glass, metal, paper, rubber, resin, wood and ceramic.
Claim 43
Independent Claim
174 words
A method of growing silicone elastomer on a substrate comprising A. dipping the substrate in an organic solvent dispersion of an uncatalyzed organosiloxane elastomer composition which consists essentially of an organosiloxane polymer and a filler whereby a thin coating of the uncatalyzed organosiloxane elastomer composition is formed on the surface of the substrate, B. dipping the substrate which is coated with a thin coat of the uncatalyzed organosiloxane elastomer composition in an organic solvent solution of a cross-linker for the organosiloxane polymer and a curing catalyst for the organosiloxane polymer and cross-linker combination, whereby curing catalyst and cross-linker diffuse into and adhere on the thin coat of the uncatalyzed organosiloxane elastomer composition on the substrate, thereafter C. placing the coated substrate resulting from (B) in an organic solvent dispersion of an uncatalyzed organosiloxane elastomer composition for at least one minute whereby an organosiloxane elastomer grows on the surface of the catalyst-containing thin coat on the substrate, and thereafter, D. removing the coated substrate from the organic solvent dispersion of the uncatalyzed organosiloxane elastomer composition.
Claim 44
Dependent Claim
27 words
The method in accordance with claim 44 in which the uncatalyzed organosiloxane elastomer composition of (C) is the same as the uncatalyzed organosiloxane elastomer composition of (A).
Claim 45
Dependent Claim
13 words
The method in accordance with claim 45 in which the cross-linker is trimethoxysilane.
Claim 46
Dependent Claim
13 words
The method in accordance with claim 44 in which the cross-linker is trimethoxysilane.
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |