Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A homogeneous elastomeric photosensitive composition suitable for printing characterised in that the composition comprises (A) 40 to 90% by weight of the total composition of a high molecular weight butadiene/acrylonitrile carboxylated copolymer having a number average molecular weight of 30,000 to 125,000, an acrylonitrile content of 10 to 50%, and a carboxyl content of 1% to 15% by weight. (B) 5 to 60% by weight of total composition of a high molecular weight butadiene/acrylonitrile non- carboxylated copolymer having a number average molecular weight of 50,000 to 100,000, an acrylonitrile content of 10 to 30% so that the combination of the carboxylated and non carboxylated high molecular weight copolymers give a composition with a carboxyl content of 3 to 10%. (C) 2 to 40% by weight of the total composition of an addition photopolymerizable ethylenically unsaturated monomer and (D) 0.1 to 10% by weight of the total composition of a photoinitiator activatable by actinic radiation.
Claim 2
Dependent Claim
154 words
A homogeneous elastomeric photosensitive composition suitable for printing characterised in that the composition comprises (A) 40 to 90% by weight of the total composition of a high molecular weight butadiene/acrylonitrile carboxylated copolymer having a number average molecular weight of 30,000 to 125,000, an acrylonitrile content of 10 to 50%, and a carboxyl content of 1% to 15% by weight. (B) 5 to 60% by weight of total composition of a high molecular weight butadiene/acrylonitrile non- carboxylated copolymer having a number average molecular weight of 50,000 to 100,000, an acrylonitrile content of 10 to 30% so that the combination of the carboxylated and non carboxylated high molecular weight copolymers give a composition with a carboxyl content of 3 to 10%. (C) 2 to 40% by weight of the total composition of an addition photopolymerizable ethylenically unsaturated monomer and (D) 0.1 to 10% by weight of the total composition of a photoinitiator activatable by actinic radiation.
Claim 3
Dependent Claim
33 words
A composition according to claim 1 charaterised in that the high molecular weight carboxylated copolymer and the high molecular weight noncarboxylated copolymer when combined have an average carboxyl content of 4 to 8%.
Claim 4
Dependent Claim
39 words
A composition according to claim 1 or claim 2 characterised in that the high molecular weight carboxylated;copolymer is present in the amount of 55 to 65% and the noncarboxylated copolymer is present in the amount of 35 to 45%.
Claim 5
Dependent Claim
36 words
A composition according to any of the preceding claims characterised in that the carboxylated high molecular weight copolymer has a number average molecular weight of 90,000 to 110,000 and the acrylonitrile content is 20 to 40%.
Claim 6
Dependent Claim
23 words
A composition according to claim 4 characterised in that the carboxylated high molecular weight copolymer has a carboxyl content of 4 to 10%.
Claim 7
Dependent Claim
37 words
A composition according to any of the preceding claims characterised in that the non carboxylated high molecular weight copolymer has a number average molecular weight of 55,000 to 85,000 and the acrylonitrile content is 20 to 30.%.
Claim 8
Dependent Claim
62 words
A composition according to;:any of the preceding claims characterised in that the carboxylated high molecular weight copolymer is present in the amount of 55 to 65%, and has a molecular weight of 90,000 to 110,000 and an acrylonitrile content of 20 to 40% and the non carboxylated high molecular weight of 55,000 to 85,000 and an acrylonitrile content of 20 to 30%.
Claim 9
Dependent Claim
32 words
A photosensitive flexographic plate characterised in that it comprises a composition as claimed in any of the preceding claims layered on a supporting substrate with a total thickness from 0.0001" to 0.25".