US3726710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon paper release compositions
Assignee: Union Carbide Corp
•
Filing: 1970-09-02
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Granted: 1973-04-10
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Expires: 1990-09-02
Abstract
Abstract Curable silicone release compositions comprising a crosslinkable olefinic containing organopolysiloxane compound and a photosensitizer and a paper substrate coated therewith; a process for preparing silicone paper release articles comprising subjecting said compositions coated on a paper substrate to high intensity predominantly continuum light radiation in order to crosslink the siloxane; and the silicone paper release articles obtained by said process.
Inventors
- 👤 S Berger
- 👤 T Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:11
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/17; B44C1/1708; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
40 words
A composition as defined in claim 1 wherein R is a member selected from the group consisting of alkyl and phenyl radicals and wherein the olefinic radical is selected from the group consisting of vinyl, allyl, cyclohexenyl and methacryloxypropyl radicals.
Claim 2
Dependent Claim
31 words
A composition as defined in claim 1 wherein the organopolysiloxane consists essentially of dimethyl siloxy units and at least two methylvinyl siloxy units per polymer molecule and terminal trimethyl siloxy units.
Claim 3
Dependent Claim
18 words
A composition as defined in claim 1, wherein an inert organic solvent is present as an additional ingredient.
Claim 4
Dependent Claim
12 words
A composition as defined in claim 1, wherein the photosensitizer is benzophenone.
Claim 5
Dependent Claim
15 words
A composition as defined in claim 1, wherein the olefinic radical is a vinyl radical.
Claim 6
Dependent Claim
15 words
A paper substrate coated with a curable silicone release composition as defined in claim 1.
Claim 7
Dependent Claim
15 words
A paper substrate coated with a curable silicone release composition as defined in claim 2.
Claim 8
Dependent Claim
15 words
A paper substrate coated with a curable silicone release composition as defined in claim 3.
Claim 9
Dependent Claim
15 words
A paper substrate coated with a curable silicone release composition as defined in claim 4.
Claim 10
Dependent Claim
15 words
A paper substrate coated with a curable silicone release composition as defined in claim 5.
Claim 11
Dependent Claim
15 words
A paper substrate coated with a curable silicone release composition as defined in claim 6.
Claim 12
Dependent Claim
101 words
A process for preparing silicone paper release articles comprising applying the release composition as defined in claim 1, to a paper substrate and exposing the composition to high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire spectral range of said continuum light radiation with a positive amount of up to 30 percent of the total light radiated at wavelengths shorter than 4,000 Angstrom units and at least 70 percent of the light radiated at wavelengths longer than 4,000 Angstrom units to crosslink the siloxane compound.
Claim 13
Dependent Claim
24 words
A process as defined in claim 13, wherein the source of said high intensity predominantly continuum light radiation is a swirl-flow plasma arc means.
Claim 14
Dependent Claim
100 words
A process for preparing silicone paper release articles comprising applying the release composition as defined in claim 2, to a paper substrate and exposing the composition to high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire spectral range of said continuum light radiation with a positive amount of up to 30 percent of the light radiated at wavelengths shorter than 4,000 Angstrom units and at least 70 percent of the light radiated at wavelengths longer than 4,000 Angstrom units to crosslink the siloxane compound.
Claim 15
Dependent Claim
24 words
A process as defined in claim 15, wherein the source of said high intensity predoMinately continuum light radiation is a swirl-flow plasma arc means.
Claim 16
Dependent Claim
100 words
A process for preparing silicone paper release articles comprising applying the release composition as defined in claim 3, to a paper substrate and exposing the composition to high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire spectral range of said continuum light radiation with a positive amount of up to 30 percent of the light radiated at wavelengths shorter than 4,000 Angstrom units and at least 70 percent of the light radiated at wavelengths longer than 4,000 Angstrom units to crosslink the siloxane compound.
Claim 17
Dependent Claim
24 words
A process as defined in claim 17, wherein the source of said high intensity predominantly continuum light radiation is a swirl-flow plasma arc means.
Claim 18
Dependent Claim
100 words
A process for preparing silicone paper release articles comprising applying the release composition as defined in claim 4, to a paper substrate and exposing the composition to high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire spectral range of said continuum light radiation with a positive amount of up to 30 percent of the light radiated at wavelengths shorter than 4,000 Angstrom units and at least 70 percent of the light radiated at wavelengths longer than 4,000 Angstrom units to crosslink the siloxane compound.
Claim 19
Dependent Claim
24 words
A process as defined in claim 19, wherein the source of said high intensity predominantly continuum light radiation is a swirl-flow plasma arc means.
Claim 20
Dependent Claim
99 words
A process for preparing silicone paper release articles comprising applying the release composition as defined in claim 5, to a paper substrate and exposing the composition to high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire spectral range of said continuum light radiation with a positive amount of up to 30 percent of the light radiated at wavelengths shorter than 4,000 Angstrom units and at least 70 percent of the light-radiated at wavelengths longer than 4,000 Angstrom units to crosslink the siloxane compound.
Claim 21
Dependent Claim
24 words
A process as defined in claim 21 wherein the source of said high intensity predominantly continuum light radiation is a swirl-flow plasma arc means.
Claim 22
Dependent Claim
100 words
A process for preparing silicone paper release articles comprising applying the release composition as defined in claim 6, to a paper substrate and exposing the composition to high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire spectral range of said continuum light radiation with a positive amount of up to 30 percent of the light radiated at wavelengths shorter than 4,000 Angstrom units and at least 70 percent of the light radiated at wavelengths longer than 4,000 Angstrom units to crosslink the siloxane compound.
Claim 23
Dependent Claim
24 words
A process as defined in claim 23, wherein the source of said high intensity predominantly continuum light radiation is a swirl-flow plasma arc means.
Claim 24
Dependent Claim
15 words
A silicone paper release article prepared according to the process as defined in claim 14.
Claim 25
Dependent Claim
15 words
A silicone paper release article prepared according to the process as defined in claim 15.
Claim 26
Dependent Claim
15 words
A silicone paper release article prepared according to the process as defined in claim 17.
Claim 27
Dependent Claim
15 words
A silicone paper release article prepared according to the process as defined in claim 19.
Claim 28
Dependent Claim
15 words
A silicone paper release article prepared according to the process as defined in claim 21.
Claim 29
Dependent Claim
15 words
A silicone paper release article prepared according to the process as defined in claim 23.
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |