US4435259A
Expired / Lapsed
US
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Radiation curable composition of vinyl polysiloxane and hydrogen polysiloxane with photosensitizer
Assignee: Pitney Bowes Inc
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Filing: 1982-09-01
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Granted: 1984-03-06
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Expires: 2002-09-01
Abstract
Abstract Novel radiation-curable, liquid vinyl organosilicon polymers and coating compositions which are free of volatile solvent(s) and which are adapted to be applied to a substrate and cured rapidly by exposure to radiation to form release coatings having good release properties with respect to adhesives, and methods for producing such polymers and compositions and for applying and curing such release coatings. The vinyl polysiloxane may be prepared from dimethyl dichlorosilane, vinyl methyl dichlorosilane, and tetrachlorosilane or trichloromethylsilane. It may be mixed with a polymethyl hydrogen polysiloxane and a photosensitizer and cured by ultraviolet or electron beam radiation.
Inventors
- 👤 Mike S. H. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:48
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0757; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/21; C08; C08G; C08G77/00; C08G77/04; C08G77/20; C09; C09D; C09D183/00; C09D183/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
Radiation curable composition comprising a liquid vinyl polysiloxane polymer having the moiety formula: ##STR4## wherein X is a number greater than 1, Y is a number greater than 0 to about 10, R's are the same or different monovalent hydrocarbon radicals selected from the group consisting of C 1 to C 4 alkyl groups, cyclohexyl groups and phenyl groups and R' is a R group an oxygen radical; a liquid polymethylhydro siloxane and at least one photosensitizer.
Claim 2
Dependent Claim
77 words
Radiation curable composition comprising a liquid vinyl polysiloxane polymer having the moiety formula: ##STR4## wherein X is a number greater than 1, Y is a number greater than 0 to about 10, R's are the same or different monovalent hydrocarbon radicals selected from the group consisting of C 1 to C 4 alkyl groups, cyclohexyl groups and phenyl groups and R' is a R group an oxygen radical; a liquid polymethylhydro siloxane and at least one photosensitizer.
Claim 3
Dependent Claim
23 words
Composition according to claim 1 in which each R radical is a methyl group, X equals about 3 and Y equals about 0.06.
Claim 4
Dependent Claim
41 words
Composition according to claim 1 comprising 1 part by weight of said vinyl polysiloxane polymer, from about 0.8 to about 1.2 parts by weight of said polymethylhydro siloxane and from about 0.08 to about 0.12 part by weight of said photosensitizer.
Claim 5
Dependent Claim
33 words
Composition according to claim 3 comprising 1 part by weight of said vinyl polysiloxane polymer, about 1 part by weight of said polymethylhydro siloxane and about 0.1 part by weight of said photosensitizer.
Claim 6
Dependent Claim
13 words
Composition according to claim 4 in which said photosensitizer comprises benzoin methyl ether.
Claim 7
Dependent Claim
116 words
Method for producing a liquid radiation-curable release coating composition comprising mixing about 1 part by weight of a liquid vinyl polysiloxane polymer having the moiety structure: ##STR5## wherein X is a number equal to or greater than 1, Y is a number selected from a range of greater than 0 to about 1, R's are the same or different monovalent hydrocarbon radicals selected from the group consisting of C 1 to C 4 alkyl groups, cyclohexyl groups and phenyl groups and R' is a R group or an oxygen radical, from about 0.8 to 1.2 part by weight of a polymethylhydro siloxane and from about 0.08 to 0.12 part by weight of at least one photosensitizer.
Claim 8
Dependent Claim
116 words
Method for producing a liquid radiation-curable release coating composition comprising mixing about 1 part by weight of a liquid vinyl polysiloxane polymer having the moiety structure: ##STR5## wherein X is a number equal to or greater than 1, Y is a number selected from a range of greater than 0 to about 1, R's are the same or different monovalent hydrocarbon radicals selected from the group consisting of C 1 to C 4 alkyl groups, cyclohexyl groups and phenyl groups and R' is a R group or an oxygen radical, from about 0.8 to 1.2 part by weight of a polymethylhydro siloxane and from about 0.08 to 0.12 part by weight of at least one photosensitizer.
Claim 9
Dependent Claim
26 words
Method according to claim 6 in which said vinyl polysiloxane polymer has the basic structure: ##STR6## wherein X equals about 3 and Y equals about 0.06.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |