Patent US4085018A successfully refreshed from Google Patents.
US4085018A
Expired / Lapsed
US
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Photocurable resin compositions
Assignee: DIC Corp
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Filing: 1977-02-02
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Granted: 1978-04-18
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Expires: 1997-02-02
Abstract
Abstract A photocurable resin composition comprising (I) an unsaturated polyester resin obtained by reacting (B) an epoxy compound containing at least about 2 epoxy groups per molecule obtained by reacting metylidene diphenol with beta -methylepichlorohydrin or epichlorohydrin, with (C) an unsaturated monobasic acid in the presence or absence of (A) a dicarboxylic acid containing at least 4 methylene groups interposed between the two carboxyl groups, or a carboxyl-terminated oligopolyester obtained by esterifying a saturated or unsaturated dibasic acid with a polyhydric alcohol, (II) a polymerizable vinyl monomer capable of addition polymerization with the unsaturated polyester resin (I), and (III) a photopolymerization initiator having an action of promoting radical polymerization by the irradiation of light.
Inventors
- 👤 Nagao Ariga
- 👤 Junji Nanbu
- 👤 Hiroshi Oikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:02
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4292
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A photocurable resin composition comprising (I) an unsaturated polyester resin obtained by reacting (B) an epoxy compound containing at least about 2 epoxy groups per molecule obtained by reacting methylidene diphenol with β-methylepichlorohydrin or epichlorohydrin, with (C) an unsaturated monobasic acid in the presence or absence of (A) a dicarboxylic acid containing at least 4 methylene groups interposed between the two carboxyl groups, or a carboxyl-terminated oligopolyester obtained by esterifying a saturated or unsaturated dibasic acid with a polyhydric alcohol, (II) a polymerizable vinyl monomer capable of addition polymerization with the unsaturated polyester resin (I), and (III) a photopolymerization initiator having an action of promoting radical polymerization by the irradiation of light.
Claim 2
Dependent Claim
112 words
A photocurable resin composition comprising (I) an unsaturated polyester resin obtained by reacting (B) an epoxy compound containing at least about 2 epoxy groups per molecule obtained by reacting methylidene diphenol with β-methylepichlorohydrin or epichlorohydrin, with (C) an unsaturated monobasic acid in the presence or absence of (A) a dicarboxylic acid containing at least 4 methylene groups interposed between the two carboxyl groups, or a carboxyl-terminated oligopolyester obtained by esterifying a saturated or unsaturated dibasic acid with a polyhydric alcohol, (II) a polymerizable vinyl monomer capable of addition polymerization with the unsaturated polyester resin (I), and (III) a photopolymerization initiator having an action of promoting radical polymerization by the irradiation of light.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the dicarboxylic acid (A) contains 4 to 200 methylene groups interposed between the two carboxyl groups.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the oligopolyester (A) has a number average molecular weight of 300 to 3,000.
Claim 5
Dependent Claim
28 words
The composition of claim 1 wherein the epoxy compound (B) has an epoxy equivalent of 170 to 190 and a viscosity at 25° C of 2,500 to 4,000.
Claim 6
Dependent Claim
31 words
The composition of claim 1 wherein the unsaturated monobasic acid (C) is acrylic acid, methacrylic acid, cinnamic acid, crotonic acid, or a reaction product of maleic acid with a monohydric alcohol.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein the unsaturated polyester (I) has a number average molecular weight of 450 to 3,000.
Claim 8
Dependent Claim
63 words
The composition of claim 1 which comprises 90 to 30% by weight of the unsaturated polyester resin (I) and 10 to 70% by weight of the polymerizable vinyl monomer (II), both being based on the total weight of (I) and (II), and 1 to 20 parts by weight, based on the entire composition (I + II + III), of the photopolymerization initiator (III).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |