| 摘要 |
The invention relates to a light-curable (photocurable), negative-working mixture and to a recording material obtained therefrom which is suitable for the production of elastic relief printing plates. The mixture contains, as essential constituents, a) an amphiphilic elastomeric binder, b) a free-radical-polymerisable compound which is compatible with the binder, contains at least one terminal ethylenically unsaturated group and has a boiling point of above 100 DEG C at atmospheric pressure, and c) a compound or compound combination which is capable of initiating the polymerisation of compound (b) on exposure to actinic light. The binder is built up from segments A, B, C and X, where A is a hydrophobic soft block having a glass transition temperature Tg of below -30 DEG C, B is a hydrophilic, hard block containing basic groups, having a glass transition temperature Tg of above + 10 DEG C, C is a hydrophobic, hard block having a glass transition temperature Tg of above + 50 DEG C and X is a unit formed from a compound containing two or more vinyl or isopropenyl groups or a branched or crosslinked homopolymer block formed from such compounds. |
