US5095044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oligomeric benzil ketals and their use as photoinitiators
Assignee: BASF Corp
•
Filing: 1990-04-27
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Granted: 1992-03-10
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Expires: 2010-04-27
Abstract
Abstract Compounds of the formula I ##STR1## in which n is 1-30 and X, Y, R, Ar 1 and Ar 2 are as defined in claim 1 can be prepared by reaction of a benzil dialkyl ketal with a diol. Depending on the molar ratio of the two reaction components, products having a different polycondensation degree n are obtained. the compounds can be used as photoinitiators.
Inventors
- 👤 Rinaldo Husler
- 👤 Rudolf Kirchmayr
- 👤 Werner Rutsch
- 👤 Manfred Rembold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:30
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/511; C07C45/515; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/76; C07C49/84; C08; C08G; C08G4/00; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
191 words
A photocurable composition containing at least one ethylenically unsaturated compound and at least 0.5 to 20% by weight of a compound or mixture of compounds of the formula I ##STR9## in which X is a group R 1 or HO--R--, Y is a group --OH or ##STR10## n is 2-20, Ar 1 and Ar 2 independently of one another are phenyl, tolyl, chlorophenyl or bromophenyl, R is a polymethylene radical having 4-30 C atoms which can be interrupted once or several times by --O--, --S--, --N(R 2 )-- or a group ##STR11## and which can be mono- or polysubstituted by C 1 -C 4 alkyl, cyclohexyl, phenyl, halogen, C 1 -C 4 alkoxy, phenoxy, C 7 -C 9 phenylalkyl, C 2 -C 8 dialkylamino, morpholino or piperidino, R 1 is methyl or ethyl, R 2 is hydrogen, C 1 -C 4 alkyl, cyclohexyl, phenyl, tolyl, benzyl, acetyl, benzoyl or is a group --CH 2 CH 2 R 3 or --SO 2 --R 4 R 3 is hydroxy or --[O--C(Ar 1 )--(--CO--Ar 2 )--O--R] 1-5 --Y, and R 4 is C 1 -C 12 alkyl, phenyl or C 7 -C 18 -alkylphenyl.
Claim 2
Dependent Claim
191 words
A photocurable composition containing at least one ethylenically unsaturated compound and at least 0.5 to 20% by weight of a compound or mixture of compounds of the formula I ##STR9## in which X is a group R 1 or HO--R--, Y is a group --OH or ##STR10## n is 2-20, Ar 1 and Ar 2 independently of one another are phenyl, tolyl, chlorophenyl or bromophenyl, R is a polymethylene radical having 4-30 C atoms which can be interrupted once or several times by --O--, --S--, --N(R 2 )-- or a group ##STR11## and which can be mono- or polysubstituted by C 1 -C 4 alkyl, cyclohexyl, phenyl, halogen, C 1 -C 4 alkoxy, phenoxy, C 7 -C 9 phenylalkyl, C 2 -C 8 dialkylamino, morpholino or piperidino, R 1 is methyl or ethyl, R 2 is hydrogen, C 1 -C 4 alkyl, cyclohexyl, phenyl, tolyl, benzyl, acetyl, benzoyl or is a group --CH 2 CH 2 R 3 or --SO 2 --R 4 R 3 is hydroxy or --[O--C(Ar 1 )--(--CO--Ar 2 )--O--R] 1-5 --Y, and R 4 is C 1 -C 12 alkyl, phenyl or C 7 -C 18 -alkylphenyl.
Claim 3
Dependent Claim
21 words
A photocurable composition according to claim 1 containing at least 1 to 5% by weight of the compound of formula 1.
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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) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |