US4777191A
Expired / Lapsed
US
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Photopolymerization initiator and method of photopolymerization by use of said initiator
Assignee: NOF Corp
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Filing: 1987-11-05
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Granted: 1988-10-11
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Expires: 2007-11-05
Abstract
Abstract Photopolymerization initiators of the general formula: ##STR1## wherein R 1 and R 1 ' independently stand for a tertiary alkyl group or a tertiary aralkyl group and R 2 and R 2 ' independently stand for a hydrogen atom, a tertiary alkoxy group, or a tertiary aralkyloxy group are disclosed. They are useful for effecting polymerization of radically polymerizable unsaturated compounds. Tetra peroxy esters of benzophenone are preferred.
Inventors
- 👤 Takeshi Komai
- 👤 Mamoru Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; C; C07; C07C; C07C409/00; C07C409/38; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A composition comprising a photopolymerization initiator, having an an active component a benzophenone group-containing peroxyester represented by the formula: ##STR13## wherein each R is independently selected from the group consisting of C 4 -C 8 tertiary alkyl groups and C 9 -C 12 tertiary aralkyl groups, said composition further comprising a radically polymerizable unsaturated compound selected from the group consisting of (meth)acrylic acid and esters thereof.
Claim 2
Dependent Claim
66 words
A composition comprising a photopolymerization initiator, having an an active component a benzophenone group-containing peroxyester represented by the formula: ##STR13## wherein each R is independently selected from the group consisting of C 4 -C 8 tertiary alkyl groups and C 9 -C 12 tertiary aralkyl groups, said composition further comprising a radically polymerizable unsaturated compound selected from the group consisting of (meth)acrylic acid and esters thereof.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said photopolymerization initiator comprises 3,3',4,4'-tetra-(t-butylperoxycarbonyl)-benzophenone.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein said photopolymerization initiator comprises 3,3',4,4'-tetra-(t-amylperoxycarbonyl)-benzophenone.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said photopolymerization initiator comprises 3,3',4,4'-tetra-(t-hexylperoxycarbonyl)-benzophenone.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein said photopolymerization initiator comprises 3,3',4,4'-tetra-(t-octylperoxycarbonyl)-benzophenone.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein said photopolymerization initiator comprises 3,3',4,4'-tetra-(cumylperoxycarbonyl)-benzophenone.
Claim 8
Dependent Claim
11 words
The composition of claim 1 wherein said photopolymerization initiator comprises 3,3',4,4'-tetra-(p-isopropylcumylperoxycarbonyl)-benzophenone.
Claim 9
Dependent Claim
13 words
The composition of claim 1, wherein all of said R groups are identical.
Claim 10
Dependent Claim
15 words
The composition of claim 1, wherein said unsaturated compound is acrylic acid or methacrylic acid.
Claim 11
Dependent Claim
29 words
The composition of claim 1, wherein said unsaturated compound is selected from a group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, phenyl (meth)acrylate, and benzyl (meth)acrylate.
Claim 12
Dependent Claim
23 words
The composition of claim 1, wherein said unsaturated compound is selected from a group consisting of 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate and 2-hydroxy-3-phenoxypropyl(meth) acrylate.
Claim 13
Dependent Claim
30 words
The composition of claim 1, wherein said unsaturated compound is selected from a group consisting of ethylene glycol diacrylate, polyethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate and pentaerythritol tetraacrylate.
Claim 14
Dependent Claim
12 words
The composition of claim 1, wherein said unsaturated compound is vinyl acrylate.
Claim 15
Dependent Claim
12 words
The composition of claim 1, wherein said unsaturated compound is oligoester acrylate.
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |