EP0290133A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ternary photoinitiator system for addition polymerization
Assignee: 3M Co
•
Filing: 1988-03-29
•
Granted: —
•
Expires: 2008-03-29
Abstract
Abstract Photocurable addition-polymerizable compositions containing a free-radically-polymerizable monomer and a photoinitiator system containing i) an arylidonium salt, ii) a sensitizing compound, and iii) an electron donor having an oxidation potential that is greater than zero and less than or equal to that of p-dimethyoxybenzene (1.32 volts vs. S.C.E.). The compositions cure rapidly and deeply under ultraviolet or visible light.
Inventors
- 👤 Michael C. C/O Minnesota Mining And Palazzotto
- 👤 Andrew F. C/O Minnesota Mining And Ubel Iii
- 👤 Joel D. C/O Minnesota Mining And Oxman
- 👤 Zaki M. C/O Minnesota Mining And Ali
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 23:34
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/029; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/116; Y10S430/117; Y10S430/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
An addition-polymerizable composition comprising: a) free-radically-polymerizable monomer, and b) photoinitiator system, soluble in said monomer, comprising photochemically effective amounts of i) aryliodonium salt, ii) sensitizing compound capable of absorbing light somewhere within the range of wavelengths between 300 and 1000 nanometers and capable of sensitizing 2-methyl-4,6-bis(trichloromethyl)-s-triazine, and iii) electron donor compound, characterized in that said donor is different from said sensitizing compound and zero < E ox (donor) ≦ E ox (p-dimethoxybenzene).
Claim 2
Dependent Claim
72 words
An addition-polymerizable composition comprising: a) free-radically-polymerizable monomer, and b) photoinitiator system, soluble in said monomer, comprising photochemically effective amounts of i) aryliodonium salt, ii) sensitizing compound capable of absorbing light somewhere within the range of wavelengths between 300 and 1000 nanometers and capable of sensitizing 2-methyl-4,6-bis(trichloromethyl)-s-triazine, and iii) electron donor compound, characterized in that said donor is different from said sensitizing compound and zero < E ox (donor) ≦ E ox (p-dimethoxybenzene).
Claim 3
Dependent Claim
24 words
A composition according to claim 1, characterized in that said E ox (donor) is between 0.5 and 1 volts vs. a saturated calomel electrode.
Claim 4
Dependent Claim
94 words
A composition according to any preceding claim, characterized in that said sensitizing compound has the formula: ACO(X) b B where X is CO or CR¹R², where R¹ and R² can be the same or different, and can be hydrogen, alkyl, alkaryl or aralkyl, b is zero or 1, and A and B can be the same or different and can be substituted or unsubstituted aryl, alkyl, alkaryl or aralkyl groups, or together A and B can form a cyclic structure which can be a substituted or unsubstituted cycloaliphatic, aromatic, heteroaromatic or fused aromatic ring.
Claim 5
Dependent Claim
100 words
A composition according to any preceding claim, characterized in that said sensitizing compound is selected from the group consisting of ketones, coumarin dyes, xanthene dyes, acridine dyes, thiazole dyes, thiazine dyes, oxazine dyes, azine dyes, aminoketone dyes, porphyrins, aromatic polycyclic hydrocarbons, p-substituted aminostyryl ketone compounds, aminotriaryl methanes, merocyanines, squarylium dyes and pyridinium dyes and said donor is selected from the group consisting of amines, amides, ethers, ureas, ferrocene, sulfinic acids and their salts, salts of ferrocyanide, ascorbic acid and its salts, dithiocarbamic acid and its salts, salts of xanthates, salts of ethylene diamine tetraacetic acid and salts of tetraphenylboronic acid.
Claim 6
Dependent Claim
38 words
A composition according to any preceding claim, characterized in that said donor contains a nitrogen, oxygen, phosphorus or sulfur donor atom and an abstractable hydrogen atom bonded to a carbon or silicon atom alpha to said donor atom.
Claim 7
Dependent Claim
29 words
A composition according to any preceding claim, characterized in that said donor comprises a tertiary amine containing an aromatic ring having at least one electron-withdrawing group on said ring.
Claim 8
Dependent Claim
39 words
A composition according to any preceding claim, characterized in that said composition contains, for every 100 parts by weight of said monomer, 0.005 to 10 parts by weight each of said aryliodonium salt, said sensitizing compound and said donor.
Claim 9
Dependent Claim
64 words
A composition according to any preceding claim, characterized in that said sensitizing compound comprises camphorquinone, said composition contains 10% to 90% reinforcing and/or extending fillers, based on the total weight of said composition, and said composition is in the form of a photocurable adhesive applied to an orthodontic bracket or in the form of a photocurable composite suitable for use as a dental restorative.
Claim 10
Dependent Claim
36 words
A composition according to any of claims 1 to 7, characterized in that said composition contains at least one julolidinyl compound and is in the form of a photocurable or photocured image-bearing coating atop a support.
Claim 11
Dependent Claim
87 words
A process for addition photopolymerization of a composition according to claim 1, characterized in that said composition is irradiated with light having a wavelength between 300 and 1000 nanometers until said composition gels or hardens, and further characterized in that said composition comprises: a) said free-radically-polymerizable monomer, and b) said photoinitiator system, comprising photochemically effective amounts of i) diphenyliodonium salt, ii) said sensitizing compound, and iii) said electron donor compound, said donor being different from said sensitizing compound and 0.5 < E ox (donor) ≦ 1 volt.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.