US4090936A
Expired / Lapsed
US
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Photohardenable compositions
Assignee: 3M Co
•
Filing: 1976-10-28
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Granted: 1978-05-23
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Expires: 1996-10-28
Abstract
Abstract Photohardenable, liquid compositions are described which are particularly useful as plating and etching resists.
Inventors
- 👤 Robert W. Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:18
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08L; C08L29/00; C08L29/02; C08L29/06; C08L29/08; C08L29/14; C08L33/00; C08L33/04; C08L33/06; C08L63/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
A photohardenable, liquid composition comprising: (a) an organic compound having an average epoxide functionally in the range of about 1 to 1.3; (b) an organic polymer which is compatible with said organic compound, said polymer having a glass transition temperature in the range of about -20° C. to 105° C. and being selected from (i) polymers derived from at least one acrylate or methacrylate monomer, (ii) copolymers of styrene and allyl alcohol, and (iii) polyvinyl butyral polymers; said polymer being present in an amount of about 3% to about 50% by weight based on the weight of said organic compound; and (c) an effective amount of an aromatic complex salt photoinitiator selected from an onium salt of a Group VA element, and onium salt of a Group VI A element, and an aromatic halonium salt.
Claim 2
Dependent Claim
135 words
A photohardenable, liquid composition comprising: (a) an organic compound having an average epoxide functionally in the range of about 1 to 1.3; (b) an organic polymer which is compatible with said organic compound, said polymer having a glass transition temperature in the range of about -20° C. to 105° C. and being selected from (i) polymers derived from at least one acrylate or methacrylate monomer, (ii) copolymers of styrene and allyl alcohol, and (iii) polyvinyl butyral polymers; said polymer being present in an amount of about 3% to about 50% by weight based on the weight of said organic compound; and (c) an effective amount of an aromatic complex salt photoinitiator selected from an onium salt of a Group VA element, and onium salt of a Group VI A element, and an aromatic halonium salt.
Claim 3
Dependent Claim
24 words
A photohardenable composition in accordance with claim 1, wherein said organic polymer is selected from copolymers of methylmethacrylate/n-butylmethacrylate, methylmethacrylate/n-butylmethacrylate/hydroxyethylmethacrylate, methylmethacrylate/styrene/n-butylacrylate/hydroxyethylacrylate, styrene/hydroxyethylacrylate, and n-butylacrylate/hydroxyethylacrylate/vinyl acetate.
Claim 4
Dependent Claim
24 words
A photohardenable composition in accordance with claim 1, wherein said organic polymer has an hydroxyl equivalent weight in the range of 200 to 1500.
Claim 5
Dependent Claim
25 words
A photohardenable composition in accordance with claim 1, wherein said organic compound is selected from glycidyl ethers and epoxy-containing materials which contain cyclohexene oxide groups.
Claim 6
Dependent Claim
27 words
A photohardenable composition in accordance with claim 1, wherein said organic polymer has a glass transition temperature in the range of about 50° C. to 60° C.
Claim 7
Dependent Claim
27 words
A photohardenable composition in accordance with claim 1, wherein said organic polymer is non-functional and has a molecular weight in the range of about 15,000 to 60,000.
Claim 8
Dependent Claim
23 words
A photohardenable composition in accordance with claim 1, wherein said photoinitiator is selected from aromatic iodonium complex salts and aromatic sulfonium complex salts.
Claim 9
Dependent Claim
114 words
A photohardenable composition in accordance with claim 7, wherein said photoinitiator is of the formula: ##STR10## where Ar 1 and Ar 2 are aromatic groups having 4 to 20 carbon atoms and are selected from the group consisting of phenyl, thienyl, furanyl and pyrazolyl groups; Z is selected from the group consisting of oxygen; sulfur; ##STR11## where R is aryl or acyl; a carbon-to-carbon bond; or ##STR12## where R 1 and R 2 are selected from hydrogen, alkyl radicals of 1 to 4 carbons, and alkenyl radicals of 2 to 4 carbons; and n is 0 or 1; and wherein X - is a halogen-containing complex anion selected from tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, and hexafluoroantimonate.
Claim 10
Dependent Claim
140 words
A photohardenable composition in accordance with claim 7, wherein said photoinitiator is of the formula: ##STR13## wherein R 1 , R 2 and R 3 are selected from the group consisting of aromatic groups having 4 to 20 carbon atoms and alkyl radicals having 1 to 20 carbon atoms; wherein at least one of R 1 , R 2 and R 3 is aromatic; wherein Z is selected from the group consisting of oxygen; sulfur; ##STR14## where R is aryl or acyl; a carbon-to-carbon bond; or ##STR15## where R 4 and R 5 are selected from the group consisting of hydrogen, an alkyl radical having 1 to 4 carbon atoms, and an alkenyl radical having 2 to 4 carbon atoms; and n is 0 or 1; and X is a halogen-containing complex anion selected from tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, and hexafluoroantimonate.
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |