US4043977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-stick polyorganosiloxane coating compositions
Assignee: Bayer AG
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Filing: 1976-03-25
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Granted: 1977-08-23
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Expires: 1996-03-25
Abstract
Abstract A composition for coating paper, films and fiber materials, comprising A. 4 PARTS BY WEIGHT OF A LINEAR POLYORGANOSILOXANE WITH ENDS STOPPED BY VINYL GROUPS AND HAVING A VISCOSITY OF UP TO ABOUT 500 CP (20 DEG C) and B. ABOUT 0.5 TO 1.5 PARTS BY WEIGHT OF A CROSSLINKING AGENT CONTAINING Si-vinyl units and SiH units and comprising molecules with a maximum of about 10 Si atoms bonded to one another via oxygen, and wherein the two reactive groups are present in adjacent positions in one and the same molecule and the remaining valencies of the Si atom are saturated by methyl groups and the SiH groups are present in a ratio of about 1:1 to 2.5:1 to the total amount of all Si-vinyl units present in the composition, C. A PLATINUM METAL COMPLEX, THE AMOUNT OF METAL BEING UP TO ABOUT 0.01 PART BY WEIGHT - BASED ON 100 PARTS BY WEIGHT OF TOTAL COMPOSITION, AND D. A DIAZIRIDINE, THE AMOUNT OF DIAZIRIDINE BEING ABOUT 75 TO 250 TIMES THE WEIGHT OF METAL.
Inventors
- 👤 Armand deMontigny
- 👤 Kurt-Wilhelm Eichenhofer
- 👤 Hans Toepsch
- 👤 Reinhard Schliebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C; C08; C08G; C08G77/00; C08G77/04; C08G77/045; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08K5/16; C08K5/34; C08L; C08L83/00; C08L83/04; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/6436; C08G77/12; C08G77/20; C08G77/70; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
208 words
A composition for coating paper, films and fiber materials, comprising a. 4 parts by weight of a linear polyorgano siloxane with ends stopped by vinyl groups and having a viscosity of up to about 500 cP (20° C) and b. about 0.5 to 1.5 parts by weight of a crosslinking agent containing Si-vinyl units and SiH units and comprising molecules with a miximum of about 10 Si atoms bonded to one another via oxygen, and wherein the two reactive groups are present in adjacent positions in one and the same molecule and the remaining valencies of the Si atom are saturated by methyl groups and the SiH groups are present in a ratio of about 1:1 to 2.5:1 to the total amount of all Si-vinyl units present in the composition, c. a platinum metal complex, the amount of metal being up to about 0.01 part by weight - based on 100 parts by weight of total composition, and d. a diaziridine of the formula ##STR4## wherein R 1 and R 2 each individually is an alkyl radical containing up to 6 carbon atoms or R 1 + R 2 are pentamethylene or hexamethylene, the amount of diaziridine being about 75 to 250 times the weight of said metal.
Claim 2
Dependent Claim
208 words
A composition for coating paper, films and fiber materials, comprising a. 4 parts by weight of a linear polyorgano siloxane with ends stopped by vinyl groups and having a viscosity of up to about 500 cP (20° C) and b. about 0.5 to 1.5 parts by weight of a crosslinking agent containing Si-vinyl units and SiH units and comprising molecules with a miximum of about 10 Si atoms bonded to one another via oxygen, and wherein the two reactive groups are present in adjacent positions in one and the same molecule and the remaining valencies of the Si atom are saturated by methyl groups and the SiH groups are present in a ratio of about 1:1 to 2.5:1 to the total amount of all Si-vinyl units present in the composition, c. a platinum metal complex, the amount of metal being up to about 0.01 part by weight - based on 100 parts by weight of total composition, and d. a diaziridine of the formula ##STR4## wherein R 1 and R 2 each individually is an alkyl radical containing up to 6 carbon atoms or R 1 + R 2 are pentamethylene or hexamethylene, the amount of diaziridine being about 75 to 250 times the weight of said metal.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the amount of said metal is about 10 to 100 ppm of total composition.
Claim 4
Dependent Claim
48 words
The composition of claim 1, wherein at least about 70% of the organo groups of the linear polyorganosiloxane other than the vinyl end groups are methyl groups and the balance are higher alkyl or phenyl groups, the polyorganosiloxane having a viscosity of about 50 to 500 cP/20° C.
Claim 5
Dependent Claim
75 words
The composition of claim 1, wherein at least about 70% of the organo groups of the linear polyorganosiloxane other than the vinyl end groups are methyl groups and the balance are higher alkyl or phenyl groups, the polyorganosiloxane having a viscosity of about 50 to 500 cP/20° C, the amount of metal is about 10 to 12 ppm of the total composition, and the composition has a viscosity of about 50 to 150 cP/20° C.
Claim 6
Dependent Claim
13 words
Paper, film or fiber material coated with a composition according to claim 1.
Claim 7
Dependent Claim
13 words
Paper, film or fiber material coated with a composition according to claim 4.
Claim 8
Dependent Claim
38 words
In a composition comprising a polyorganosiloxane having vinyl end groups, a crosslinking agent therefor, and a platinum-containing catalyst, the improvement which comprises a diaziridine in about 75 to 250 times the weight of platinum, whereby crosslinking is retarded.
Claim 9
Dependent Claim
38 words
In a composition comprising a polyorganosiloxane having vinyl end groups, a crosslinking agent therefor, and a platinum-containing catalyst, the improvement which comprises a diaziridine in about 75 to 250 times the weight of platinum, whereby crosslinking is retarded.
References Cited (Backward Citations)
US3652615A
Cited
US3631086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |