| 摘要 |
A mixture comprises at least one hydroxyl- functional polyalkylorganosiloxane and at least one cationic photoinitiator. A mixture comprises at least one hydroxyl-functional polyalkylorganosiloxane of formula R 2>- Si(R 1>) 2-O-[Si(R 1>) 2-O] a-[Si(R 1>)(R 2> 1>)-O] b-Si(R 1>) 2-R 2> 2> and at least one cationic photoinitiator. a : 0 - 200; b : 0 - 50; R 1>alkyl; R 2>,R 2> 1>,R 2> 2>R 2 a or R 2 b; R 2 aalkyl, aryl or aralkyl (all optionally substituted); R 2 b-R 3>[-O-(C nH 2 nO-) xH] z; R 3>z+1-valent hydrocarbon radical which optionally is substituted and/or contains ether bridges or is an aryl radical or aralkyl radical which optionally is substituted and/or contains ether bridges; n : 2 - 4; x : 0 - 100; z : 1 - 6. Provided that in the average molecule in each case at least one radical R 2>, R 2> 1>, R 2> 2> is R 2 b. Independent claims are included for the following: (1) a method for increasing the storage shelf life of a solution comprising of at least one cationic photo initiator, involving dissolving the cationic photoinitiator in a solvent comprising the at least one hydroxyl-functional polyalkylorganosiloxane, as solvents for cationic photoinitiators where the solution is stable for at least six months; (2) a cationically curable composition comprising at least one organopolysiloxane, which contains at least one UV reactive group and that cures cationically under UV radiation, and the mixture; and (3) an adhesive coating obtained by reacting the cationically curable composition with UV light. |
