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US4548690A
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Photoactivated polymerization of vinyl monomers in the presence of polysilanes and amines
Assignee: 3M Co
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Filing: 1984-02-28
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Granted: 1985-10-22
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Expires: 2004-02-28
Abstract
Abstract Combinations of a vinyl monomer (or prepolymer), a catenated polysilane and an amine are photopolymerizable in the presence of oxygen.
Inventors
- 👤 Donald G. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:31
CPC Classifications
C; C08; C08F; C08F230/00; C08F230/04; C08F230/08; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F283/00; C08F283/12; C08F283/124; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/121
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A process which comprises subjecting a mixture of (1) a vinyl monomer or prepolymer; (2) a polysilane photoinitiator 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; and (3) an organic amine activator to radiation in the range of about 250-400 nanometers until the degree of polymerization of the monomer or prepolymer has increased.
Claim 2
Dependent Claim
83 words
A process which comprises subjecting a mixture of (1) a vinyl monomer or prepolymer; (2) a polysilane photoinitiator 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; and (3) an organic amine activator to radiation in the range of about 250-400 nanometers until the degree of polymerization of the monomer or prepolymer has increased.
Claim 3
Dependent Claim
33 words
A process according to claim 1 wherein the mixture contains from about 0.01% to 10% by weight of each of (2) and (3), based on the total weight of (1), (2) and (3).
Claim 4
Dependent Claim
73 words
A process according to claim 1 in which the polysilane is 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.
Claim 5
Dependent Claim
17 words
A process according to claim 1 wherein the amine activator contains not more than 36 carbon atoms.
Claim 6
Dependent Claim
61 words
A photopolymerizable composition which comprises a mixture of (1) a vinyl monomer or prepolymer; (2) a polysilane photoinitiator 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; and (3) an organic amine activator.
Claim 7
Dependent Claim
61 words
A photopolymerizable composition which comprises a mixture of (1) a vinyl monomer or prepolymer; (2) a polysilane photoinitiator 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; and (3) an organic amine activator.
Claim 8
Dependent Claim
31 words
A composition according to claim 5 which contains from about 0.01% to 10% by weight of each of (2) and (3) based on the total weight of (1), (2) and (3).
Claim 9
Dependent Claim
73 words
A composition according to claim 5 in which the polysilane is of the formula ##STR5## 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.
Claim 10
Dependent Claim
17 words
A composition according to claim 5 wherein the amine activator contains not more than 36 carbon atoms.
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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) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |