US4569953A
Expired / Lapsed
US
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Photoactivated polymerization of vinyl monomers by polysilanes
Assignee: 3M Co
•
Filing: 1984-02-28
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Granted: 1986-02-11
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Expires: 2004-02-28
Abstract
Abstract Exposure to light or an energetic source of radiation of a mixture of a vinyl monomer or prepolymer with a photo-activatable polysilane results in the polymerization of the vinyl monomer or prepolymer.
Inventors
- 👤 Robert C. West
- 👤 Andrew R. Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:24
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F283/00; C08F283/12; C08F283/124; G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0754; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
142 words
A process which comprises subjecting a mixture of (1) a vinyl monomer or prepolymer and; (2) a soluble polysilane of the formula ##STR3## wherein R a , R b , R c and R d are individually selected from aliphatic, aromatic, substituted aromatic, araliphatic and cycloaliphatic groups containing not more than about 18 carbon atoms each, and y and x are numbers from about 1 to 19,000, provided that the sum of y and x is from about 2 to 20,000, having a main chain of catenated silicon atoms and a molecular weight (M n ) of from about 5×10 2 to 5×10 6 which absorbs electromagnetic energy in the wavelength range of from about 250 to 400 nanometers to radiation in the range of about 250 to 400 nanometers until the degree of polymerization of the monomer or prepolymer has increased.
Claim 2
Dependent Claim
142 words
A process which comprises subjecting a mixture of (1) a vinyl monomer or prepolymer and; (2) a soluble polysilane of the formula ##STR3## wherein R a , R b , R c and R d are individually selected from aliphatic, aromatic, substituted aromatic, araliphatic and cycloaliphatic groups containing not more than about 18 carbon atoms each, and y and x are numbers from about 1 to 19,000, provided that the sum of y and x is from about 2 to 20,000, having a main chain of catenated silicon atoms and a molecular weight (M n ) of from about 5×10 2 to 5×10 6 which absorbs electromagnetic energy in the wavelength range of from about 250 to 400 nanometers to radiation in the range of about 250 to 400 nanometers until the degree of polymerization of the monomer or prepolymer has increased.
Claim 3
Dependent Claim
28 words
A process according to claim 1 wherein the mixture contains from about 0.01% to 10% by weight of (2), based on the total weight of (1) and (2).
Claim 4
Dependent Claim
28 words
A process according to claim 1 wherein R a , R b , R c and R d are individually selected from phenyl, methyl, cyclohexyl, phenethyl and p-methylphenyl.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein R a is aromatic or aralkyl and R b , R c and R d are aliphatic.
Claim 6
Dependent Claim
24 words
A process according to claim 1 wherein R a and R c are aromatic or aralkyl and R b and R d are aliphatic.
Claim 7
Dependent Claim
36 words
A process according to claim 1 wherein R a is phenyl or phenethyl, R b , R c and R d are aliphatic and the ratio of x to y varies from about 3:1 to 1:20.
Claim 8
Dependent Claim
43 words
A process according to claim 1 wherein R a and R c are the same and are selected from phenyl and phenethyl and R b and R d are the same and are selected from aliphatic, aromatic, substituted aromatic, araliphatic and cycloaliphatic groups.
Claim 9
Dependent Claim
118 words
A photopolymerizable composition which comprises a mixture of (1) a vinyl monomer or prepolymer; and (2) a soluble polysilane of the formula ##STR4## wherein R a , R b , R c and R d are individually selected from aliphatic, aromatic, substituted aromatic, araliphatic and cycloaliphatic groups containing not more than about 18 carbon atoms each, and y and x are numbers from about 1 to 19,000, provided that the sum of y and x is from about 2 to 20,000, having a main chain of catenated silicon atoms and a molecular weight (M n ) from about 5×10 2 to 5×10 6 which absorbs electromagnetic energy in the wavelength range of from about 250 to 400 nanometers.
Claim 10
Dependent Claim
118 words
A photopolymerizable composition which comprises a mixture of (1) a vinyl monomer or prepolymer; and (2) a soluble polysilane of the formula ##STR4## wherein R a , R b , R c and R d are individually selected from aliphatic, aromatic, substituted aromatic, araliphatic and cycloaliphatic groups containing not more than about 18 carbon atoms each, and y and x are numbers from about 1 to 19,000, provided that the sum of y and x is from about 2 to 20,000, having a main chain of catenated silicon atoms and a molecular weight (M n ) from about 5×10 2 to 5×10 6 which absorbs electromagnetic energy in the wavelength range of from about 250 to 400 nanometers.
Claim 11
Dependent Claim
26 words
A composition according to claim 11 which contains from about 0.01% to 10% by weight of (2), based on the total weight of (1) and (2).
Claim 12
Dependent Claim
28 words
A composition according to claim 8 wherein R a , R b , R c and R d are individually selected from phenyl, methyl, cyclohexyl, phenethyl and p-methylphenyl.
Claim 13
Dependent Claim
25 words
A composition according to claim 8 wherein R a is aromatic or aralkyl and R b , and R c and R d are aliphatic.
Claim 14
Dependent Claim
24 words
A composition according to claim 8 wherein R a and R c are aromatic or aralkyl and R b and R d are aliphatic.
Claim 15
Dependent Claim
36 words
A composition according to claim 8 wherein R a is phenyl or phenethyl, R b , R c and R d are aliphatic and the ratio of x to y varies from about 3:1 to 1:20.
Claim 16
Dependent Claim
43 words
A composition according to claim 8 wherein R a and R c are the same and are selected from phenyl and phenethyl and R b and R d are the same and are selected from aliphatic, aromatic, substituted aromatic, araliphatic and cycloaliphatic groups.
References Cited (Backward Citations)
No citation records indexed.
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