Claims
- 1. A photosensitive resin composition for a flexographic printing plate, comprising:
- (a) 10 to 99 parts by weight of a resin particle having an average particle size of 0.01 to 5 .mu.m, said resin particle having a core/shell structure, wherein the shell portion has a three-dimensionally crosslinked structure and the core portion is not crosslinked, said resin particle having a weight ratio of core portion to shell portion of from 20:80 to 99:1, said shell portion being prepared from a mixture of at least one monofunctional monomer or conjugated diene monomer and at least one polyfunctional monomer excluding a conjugated diene monomer, wherein the ratio of the monofunctional:polyfunctional monomers in said shell portion is 70:30 to 95:5,
- (b) 1 to 90 parts by weight of a compound having a photopolymerizable group, and
- (c) 0.01 to 10 parts by weight of a photopolymerization initiator, the amounts of the above components (a), (b) and (c) in the photosensitive resin composition being determined based on a total of 100 parts by weight of the above components (a), (b) and (c),
- wherein the core portion of the resin particle (a) has a Tg of 0.degree. C. or lower, and the shell portion has a Tg of 30.degree. C. or higher.
- 2. The composition according to claim 1, wherein the resin particle (a) is formed by a two-stage emulsion polymerization process, and wherein the core portion is obtained from at least one monofunctional monomer.
- 3. The composition according to claim 2, wherein said at least one monofunctional monomer forming the core portion of the resin particle (a) contains an aliphatic conjugated diene monomer, and the amount of the diene monomer is not less than 40% by weight based upon the total amount of the monomer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-010799 |
Jan 1992 |
JPX |
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Parent Case Info
This application is a continuation of now abandoned application, Ser. No. 08/008,482, filed Jan. 25, 1993 abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4726877 |
Fryd et al. |
Feb 1988 |
|
4956252 |
Fryd et al. |
Sep 1990 |
|
5075192 |
Fryd et al. |
Dec 1991 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
0237306 |
Sep 1987 |
EPX |
0356953 |
Mar 1990 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
08482 |
Jan 1993 |
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