US4427760A
Expired / Lapsed
US
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Photohardenable materials
Assignee: Somar Corp
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Filing: 1982-06-10
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Granted: 1984-01-24
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Expires: 2002-06-10
Abstract
Abstract A photohardenable material is disclosed. The material is comprised of a copolymer (I') having ethylenically unsaturated bonds and having an acid value of about 5 to 180 and a molecular weight of about 1,500 to 100,000. The copolymer (I') is obtained by reacting carboxyl groups with a copolymer represented by the structural formula (I), as defined within the application. The material is further comprised of a copolymer (II) having a molecular weight of about 50,000 to 500,000. The copolymer (II) is comprised of three monomers whose structural formula is also defined within the application. The material is further comprised of a cross-linking agent having two or more ethylenically unsaturated bonds and a photoactivator. The copolymers (I') and (II) are present in a ratio of about 0.5 to 20.
Inventors
- 👤 Kohtaro Nagazawa
- 👤 Tsutomu Satoh
- 👤 Kunio Morikubo
- 👤 Fujio Tanaka
- 👤 Masaki Okuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:50
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/033; C; C08; C08F; C08F257/00; C08F257/02; C08F265/00; C08F265/04; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/111; Y10S430/128
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
261 words
A photohardenable material, comprising: a copolymer (I') having ethylenically unsaturated bonds and having an acid value of about 5 to 180 and a molecular weight of about 1,500 to 100,000, the copolymer (I') being obtained by reacting carboxyl groups of a copolymer represented by formula (I) ##STR3## wherein Ar represents a phenyl group or a substituted phenyl group; R 1 represents a hydrogen atom or a methyl group; R 2 represents a lower alkyl group; and the numbers m 1 and m 2 represent each a ratio of each monomer in the copolymer, wherein they have a relation of m 1 ≧m 2 , with a compound having an oxirane ring and an ethylenically unsaturated bond; a copolymer (II) having a molecular weight of about 50,000 to 500,000 comprised of three monomers represented by formula (II) ##STR4## wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a lower alkyl group; R 3 represents a benzyl group, a substituted benzyl group having substituents on the phenyl ring, a tert-butyl group or an isobutyl group, but R 2 ≠R 3 ; and the numbers n 1 , n 2 and n 3 represent each a ratio of each monomer in the copolymer, wherein they have relations of n 1 <n 2 and about 20≧(n 1 +n 2 )/n 3 ≧about 1; a cross-linking agent having two or more ethylenically unsaturated bonds; and a photoactivator, wherein a ratio by weight of the copolymer (I') to the copolymer (II) is in a range of (I')/(II) being about 0.5 to 20.
Claim 2
Dependent Claim
261 words
A photohardenable material, comprising: a copolymer (I') having ethylenically unsaturated bonds and having an acid value of about 5 to 180 and a molecular weight of about 1,500 to 100,000, the copolymer (I') being obtained by reacting carboxyl groups of a copolymer represented by formula (I) ##STR3## wherein Ar represents a phenyl group or a substituted phenyl group; R 1 represents a hydrogen atom or a methyl group; R 2 represents a lower alkyl group; and the numbers m 1 and m 2 represent each a ratio of each monomer in the copolymer, wherein they have a relation of m 1 ≧m 2 , with a compound having an oxirane ring and an ethylenically unsaturated bond; a copolymer (II) having a molecular weight of about 50,000 to 500,000 comprised of three monomers represented by formula (II) ##STR4## wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a lower alkyl group; R 3 represents a benzyl group, a substituted benzyl group having substituents on the phenyl ring, a tert-butyl group or an isobutyl group, but R 2 ≠R 3 ; and the numbers n 1 , n 2 and n 3 represent each a ratio of each monomer in the copolymer, wherein they have relations of n 1 <n 2 and about 20≧(n 1 +n 2 )/n 3 ≧about 1; a cross-linking agent having two or more ethylenically unsaturated bonds; and a photoactivator, wherein a ratio by weight of the copolymer (I') to the copolymer (II) is in a range of (I')/(II) being about 0.5 to 20.
Claim 3
Dependent Claim
24 words
A photohardenable material as claimed in claim 1, wherein the acid value of copolymer (I') is in the range of about 30 to 120.
Claim 4
Dependent Claim
36 words
A photohardenable material as claimed in claim 2, wherein the cross-linking agent is present in an amount of about 10 to 100% by weight based on the weight of the total of copolymer (I') and (II).
Claim 5
Dependent Claim
38 words
A photohardenable material as claimed in claim 1, wherein said compound having an oxirane ring and en ethylenically unsaturated bond is glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, glycidyl α-ethylacrylate, crotonyl glycidyl ether, glycidyl crotonate or glycidyl isocrotonate.
Claim 6
Dependent Claim
44 words
A photohardenable material as claimed in claim 1, wherein said cross-linking agent has a boiling point of about 150° C. or more under atmospheric pressure, and contains ethylenically unsaturated bonds as an acryl residual group, a methacryl residual group or an allyl residual group.
References Cited (Backward Citations)
US3754054A
Cited
US4284707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |