US3922443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating a substrate with a polysiloxane composition
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-01-30
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Granted: 1975-11-25
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Expires: 1994-01-30
Abstract
Abstract A process for rendering a surface of a substrate abhesive by applying a coating composition consisting essentially of 80 to 99 parts by weight hydroxy ended polysiloxane of viscosity not greater than 5000 cP at 20*C, 1 to 20 parts by weight organohydrogenpolysiloxane of viscosity less than 5000 cP at 20*C and up to 0.1 part by weight of platinum catalyst per 100 parts by weight total polysiloxanes.
Inventors
- 👤 Douglas Arthur Brown
- 👤 William David Garden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:07
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20; C08G77/22; C08G77/24; C08G77/70; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
A PROCESS FOR RENDERING THE SURFACE OF SUBSTRATE ABHESIVE COMPRISING APPLYING TO A SUBSTRATE AN ESSENTIALLY SOLVENTFREE COMPOSITION CONSISTING ESSENTIALLY OF 80 TO 99 PARTS BY WEIGHT OF A HYDROXY-ENDED DIORGANOPOLYSILIOXANE OF VISCOSITY NOT GREATER THAN 1000CP AT 20*C, 1 TO 20 PARTS BY WEIGHT OF AN ORGANOHYDROGENPOLYSILOXANE OF VISCOSITY NOT GREATHER THAN 100 CP AT 20*C BOTH PER 100 PARTS BY WEIGHT OF TOTAL POLYSILOXANES AND FROM 0.001 TO 0.1 PART BY WEIGHT CALCULATED AS PLATINUM, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COMPLEDES OF HALIDES OF PLATINUM METALS WITH A LIGAND OR DONOR GROUP, PER 100 PARTS BY WEIGHT OF TOTAL POLYSILOXANES AND THERAFTER CURING THE COATING TO AN ADHESIVE FILM BY HEATING.
Claim 2
Dependent Claim
117 words
A PROCESS FOR RENDERING THE SURFACE OF SUBSTRATE ABHESIVE COMPRISING APPLYING TO A SUBSTRATE AN ESSENTIALLY SOLVENTFREE COMPOSITION CONSISTING ESSENTIALLY OF 80 TO 99 PARTS BY WEIGHT OF A HYDROXY-ENDED DIORGANOPOLYSILIOXANE OF VISCOSITY NOT GREATER THAN 1000CP AT 20*C, 1 TO 20 PARTS BY WEIGHT OF AN ORGANOHYDROGENPOLYSILOXANE OF VISCOSITY NOT GREATHER THAN 100 CP AT 20*C BOTH PER 100 PARTS BY WEIGHT OF TOTAL POLYSILOXANES AND FROM 0.001 TO 0.1 PART BY WEIGHT CALCULATED AS PLATINUM, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COMPLEDES OF HALIDES OF PLATINUM METALS WITH A LIGAND OR DONOR GROUP, PER 100 PARTS BY WEIGHT OF TOTAL POLYSILOXANES AND THERAFTER CURING THE COATING TO AN ADHESIVE FILM BY HEATING.
Claim 3
Dependent Claim
34 words
A process according to claim 1 wherein the diorganopolysiloxane is used in amount from 90 to 99 parts by weight and the organohydrogenpolysiloxane is used in amount from 1 to 10 parts by weight.
Claim 4
Dependent Claim
45 words
A process coating according to claim 1 wherein the organo groups present in the polysiloxane are selected from the group consisting of alkyl, aryl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, not more than 10 per cent of the total organo groups being unsaturated groups.
Claim 5
Dependent Claim
25 words
A process according to claim 1 wherein the proportion of hydrogen in the organohydrogenpolysiloxane is such that the H/Si ratio is from 1:10 to 1:1.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein the halide in the catalyst is chloride.
Claim 7
Dependent Claim
15 words
A process according to claim 1 wherein the platinum metal in the catalyst is platinum.
Claim 8
Dependent Claim
26 words
A process according to claim 1 wherein the catalyst is used in amount from 0.001 to 0.05 part per 100 parts by weight of total polysiloxanes.
Claim 9
Dependent Claim
27 words
A process according to claim 1 wherein the substrate is selected from the group consisting of paper, polyolefin film, polyester film, regenerated cellulose film and metal foils.
Claim 10
Dependent Claim
29 words
A process according to claim 3 wherein the organo groups are selected from the group consisting of methyl, ethyl, propyl, butyl, phenyl, vinyl, tetrachlorophenyl, trifluoroethyl, trifluoropropyl and cyclohexyl groups.
Claim 11
Dependent Claim
9 words
Substrates coated by the process claimed in claim 1.
References Cited (Backward Citations)
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US3338847A
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US3527659A
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |