Claims
- 1. An onium salt represented by the following formula (1): ##STR37## wherein Ar is a mono- to tetra-valent aromatic group, X is a bisphenylsulfonio group which may have a substituent, a is 1-4, b is 0 or 1-3, a+b is 1-4, n is 1-4, and Z is a halide represented by the following formula (3): ##STR38## where M is a boron atom, a phosphorus atom, an arsenic atom or an antimony atom, Q is a halogen atom, m is 3-6, l is 0 or 1, and m+l is 4-6.
- 2. An onium salt according to claim 1, wherein Ar is ##STR39## which may have at least one substituent selected from (C.sub.1 -C.sub.5) alkyl group, (C.sub.1 -C.sub.5) alkyloxycarbonyl group, (C.sub.1 -C.sub.5) alkylcarbonyloxy group, benzoyl group, cyano group, (C.sub.1 -C.sub.5) alkylthio group, and halogen atom); the bisphenylsulfonio group which may have a substituent is a group represented by the following formula (2): ##STR40## wherein R.sub.1 -R.sub.10 each is a hydrogen atom, a halogen atom, a nitro group, an alkoxy group, an alkyl group, a phenyl group which may have a substituent of C.sub.6 -C.sub.18, a phenoxy group, a phenylcarbonyl group, an alkylthio group, a phenylthio group, a benzyloxy group, a C.sub.1 -C.sub.25 aliphatic group containing at least one hydroxyl group or a C.sub.3 -C.sub.25 aliphatic group containing a group represented by the following formula: ##STR41## where R.sub.11 is a hydrogen atom or an alkyl group; a is 1-4; b is 0 or 1-3; a+b is 1-4; n is 1-4; and Z is a halide represented by the following formula (3): ##STR42## where M is a boron atom, a phosphorus atom, an arsenic atom or an antimony atom, Q is a halogen atom, m is 3-6, l is 0 or 1, and m+l is 4-6.
- 3. An onium salt according to claim 2, wherein Ar is ##STR43## R.sub.1 -R.sub.10 each is a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.5) alkoxy group or a C.sub.1 -C.sub.5) alkyl group, and M is a phosphorus atom or an antimony atom.
- 4. An onium salt according to claim 3, wherein at least one of R.sub.1 -R.sub.5 is a halogen atom and the remainder are hydrogen atoms and at least one of R.sub.6 -R.sub.10 is a halogen atom and the remainder of R.sub.6 -R.sub.10 are hydrogen atoms.
- 5. An onium salt according to claim 2, wherein Ar is ##STR44## R.sub.3 and R.sub.8 are halogen atoms, R.sub.1, R.sub.2, R.sub.4 -R.sub.7, R.sub.9 and R.sub.10 are hydrogen atoms, a is 2, b is 0, n is 2, M is a phosphorus atom or an antimony atom, m is 6, and l is 0.
- 6. An onium salt according to claim 5, wherein the halogen atom is a fluorine atom.
- 7. An onium salt represented by the following formula: ##STR45##
- 8. An onium salt represented by the following formula: ##STR46##
- 9. A photopolymerization initiator which comprises, in the presence of a solvent, an onium salt represented by the following formula (1): ##STR47## wherein Ar is ##STR48## which may have at least one substituent selected from (C.sub.1 -C.sub.5) alkyl group, (C.sub.1 -C.sub.5) alkyloxycarbonyl group, (C.sub.1 -C.sub.5) alkylcarbonyloxy group, benzoyl group, cyano group, (C.sub.1 -C.sub.5) alkylthio group and halogen atom; X is a bisphenyl-sulfonio group represented by the following formula (2): ##STR49## wherein R.sub.1 -R.sub.10 each is a hydrogen atom, a halogen atom, a nitro group, an alkoxy group, an alkyl group, a phenyl group which may have a substituent of C.sub.6 -C.sub.18, a phenoxy group, a phenylcarbonyl group, an alkylthio group, a phenylthio group, a benzyloxy group, a C.sub.1 -C25 aliphatic group containing at least one hydroxyl group or a C.sub.3 -C.sub.25 aliphatic group containing a group represented by the following formula: ##STR50## where R.sub.11 is a hydrogen atom or an alkyl group; a is 1-4; b is 0 or 1-3; a+b is 1-4; n is 1-4; and Z is a halide represented by the following formula (3): ##STR51## where M is a boron atom, a phosphorus atom, an arsenic atom or an antimony atom, Q is a halogen atom, m is 3-6, g is 0 or 1, and m+l is 4-6.
- 10. A polymerization initiator according to claim 9, wherein Ar is ##STR52## R.sub.1 -R.sub.10 each is a hydrogen atom, a halogen atom, a (C.sub.1 -C.sub.5) alkoxy group or a (C.sub.1 -C.sub.5) alkyl group, and M is a phosphorus atom or an antimony atom.
- 11. A polymerization initiator according to claim 10, wherein at least one of R.sub.1 -R.sub.5 is a halogen atom and the remainder are hydrogen atoms and at least one of R.sub.6 -R.sub.10 is a halogen atom and the remainder of R.sub.6 -R.sub.10 are hydrogen atoms.
- 12. A polymerization initiator according to claim 9, wherein Ar is ##STR53## R.sub.3 and R.sub.8 are halogen atoms; R.sub.1, R.sub.2, R.sub.4 -R.sub.7, R.sub.9 and R.sub.10 are hydrogen atoms; a is 2; b is 0; n is 2; M is a phosphorus atom or an antimony atom: m is 6; and l is 0.
- 13. A polymerization initiator according to claim 12, wherein the halogen atoms are fluorine atoms.
- 14. A polymerization initiator according to claim 9, wherein the onium salt is represented by the following formula: ##STR54##
- 15. A polymerization initiator according to claim 9, wherein the onium salt is represented by the following formula: ##STR55##
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-170853 |
Jun 1993 |
JPX |
|
Parent Case Info
This application is a divisional of application Ser. No. 08/255,469, filed Jun. 8, 1994, now U.S. Pat. No. 5,502,083.
US Referenced Citations (10)
Foreign Referenced Citations (6)
Number |
Date |
Country |
0142384 |
May 1985 |
EPX |
3604581 |
Aug 1987 |
DEX |
52-14277 |
Apr 1977 |
JPX |
52-14278 |
Apr 1977 |
JPX |
3134075 |
Jun 1991 |
JPX |
2904626 |
Aug 1979 |
NLX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
255469 |
Jun 1994 |
|