Abstract:
The present invention is intended to provide a photosensitive rubber plate which is superior in transparency and strength balance and high in rate of washing with water after light exposure, and a photosensitive composition used for obtaining the rubber plate. The photosensitive composition contains 20-65 parts by weight of a block copolymer havingat least one polymer block A consisting of a polymer containing 95% by weight or more of an aromatic vinyl monomer unit andat least one polymer block B consisting of a conjugated diene polymer containing 20% by weight or more of a conjugated diene monomer unit and having a vinyl bond content in the conjugated diene monomer unit, of 15-70% by weight.35-80 parts by weight of a hydrophilic copolymer, the total amount of the block copolymer and the hydrophilic copolymer being 100 parts by weight,5-300 parts by weight of a photopolymerizable ethylenically unsaturated monomer, and0.1-10 parts by weight of a photopolymerization initiator.
Abstract:
A photosensitive elastomeric composition comprising (1) at least one elastomer, (2) an addition-polymerizable compound having at least one CH.sub.2 .dbd.C
Abstract translation:一种感光性弹性体组合物,其包含(1)至少一种弹性体,(2)具有至少一个CH 2 = C <基团的加成聚合化合物和(3)可通过光化剂活化的聚合引发剂,其中所述弹性体(1) 弹性体选自(a)由含有至少两个非共轭双键的多烯单体和共轭二烯类单体组成的弹性体聚合物或共轭二烯类单体和可共聚乙烯基单体两者,(b)弹性线性 AB型(其中A表示单乙烯基芳族化合物的聚合物嵌段,B表示共轭二烯型单体的聚合物嵌段)嵌段共聚物,其中具有可聚合烯键式双键的末端基团存在于 分子链。
Abstract:
A photosensitive composition which comprises5 to 55 parts by weight of a linear block copolymer 1 consisting essentially of only one polymer block A which is a polymer consisting essentially of aromatic vinyl monomer units as the main constitutive units and conjugated diene monomer units as secondary monomer units, and only one or two polymer blocks B each of which is a polymer consisting essentially of conjugated diene monomer units as the main constitutive units and aromatic vinyl monomer units as secondary monomer units, wherein among all the monomer units the aromatic vinyl monomer units constitute 15 to 30% by weight, the conjugated diene monomer units constitute 85 to 70% by weight, the total amount of the aromatic vinyl monomer units and the conjugated diene monomer units being 100% by weight, and wherein the total amount of the aromatic vinyl monomer units constituting molecular chain portions each having 8 or more successive aromatic vinyl monomer units is 30% by weight or more of the amount of all the aromatic vinyl monomer units,10 to 60 parts by weight of a block copolymer 2 consisting essentially of at least two polymer blocks C each of which is a polymer containing aromatic vinyl monomer units as the main constitutive units, and at least one polymer block D which is a polymer containing conjugated diene monomer units as the main constitutive units,35 to 85 parts by weight of a hydrophilic copolymer 3, provided that the total amount of the block copolymer 1, the block copolymer 2 and the hydrophilic copolymer 3 is 100 parts by weight,5 to 300 parts by weight of a photopolymerizable ethylenically unsaturated monomer 4, and0.1 to 10 parts by weight of a photopolymerization initiator 5.
Abstract:
The present invention is intended to provide a photosensitive rubber plate high in strength balance and image reproducibility and a photosensitive elastomer composition used for obtaining the rubber plate. A photosensitive elastomer composition is obtained by kneading 65 parts by weight of a phosphoric acid ester group-containing random copolymer (monomers composition: 60% of butadiene, 9% of methyl methacrylate, 20% of 2-methacryloxyethyl phosphate, 10% of styrene and 1% of divinylbenzene), 35 parts by weight of a polystyrene-polybutadiene-polystyrene type block copolymer, 15 parts by weight of 1,7-heptanediol dimethacrylate, 1 part by weight of benzoin methyl ether and 0.02 part of methylhydroquinone. By interposing this photosensitive elastomer composition between two polyester films and pressurizing them with a press, a photosensitive rubber plate having a total thickness of 3 mm is obtained.
Abstract:
A photosensitive composition comprising: (A) 35-80 weight parts of a phosphorus-containing hydrophilic copolymer made by copolymerization of a mixture of (a) 5-30 weight % of a phosphate ester group-containing unsaturated monomer, (b) 40-90 weight % of a conjugated diene monomer, and (c) 0-50 weight % of other monoolefinically unsaturated monomer; (B) 65-20 weight parts of a thermoplastic elastomer; the sum of (A) plus (B) being 100 weight parts; (C) 5-300 weight parts of a photopolymerizable ethylenically unsaturated monomer; and (D) 0.1-10 weight parts of a photopolymerization initiator. The photosensitive composition is useful for a photosensitive rubber plate and a flexographic printing plate.
Abstract:
A photosensitive elastomeric composition comprising (1) at least one elastomer, (2) an addition-polymerizable compound having at least one CH.sub.2 .dbd.C
Abstract translation:一种感光性弹性体组合物,其包含(1)至少一种弹性体,(2)具有至少一个CH 2 = C <基团的加成聚合化合物和(3)可通过光化剂活化的聚合引发剂,其中所述弹性体(1) 弹性体选自(a)由含有至少两个非共轭双键的多烯单体和共轭二烯类单体组成的弹性体聚合物或共轭二烯类单体和可共聚乙烯基单体两者,(b)弹性线性 AB型(其中A表示单乙烯基芳族化合物的聚合物嵌段,B表示共轭二烯型单体的聚合物嵌段)嵌段共聚物,其中具有可聚合烯键式双键的末端基团存在于 分子链。