Cationic radiation-curing controlled release coating materials

1. A cationic radiation-curing controlled release formulation for producing silicone release coatings, composed of:

a) 1% to 60% by mass of at least one silicone resin modified with vinylalkoxysilane and vinylcyclohexene oxide,

b) 35% to 98.5% by mass of at least one epoxy-functionalized polysiloxane, and

c) 0.5% to 5% by mass of at least one cationic photoinitiator.

2. The cationic radiation-curing controlled release formulation as claimed in claim 1 , comprising

d) at least one coinitiator.

3. A process for preparing component a) as claimed in claim 1 , by reacting, in accordance with conditions that are known per se,

A) SiH-functional silicone resins of the general formula (I),

M a M′ b D c D′ d T e Q f   (I)

in which

M=(R 1 ) 3 SiO 1/2 ,

M′=(R 1 ) 2 HSiO 1/2 ,

D=(R 1 ) 2 SiO 2/2 ,

D′=(R 1 )HSiO 2/2 ,

T=(R 1 )SiO 3/2 ,

Q=SiO 4/2 ,

R 1 are identical or different radicals from the following group: alkyl, aryl, or alkaryl having 1 to 30 C atoms,

a=4 to 200,

b=0 to 20,

c=0 to 100,

d=0 to 20,

e=0 to 150, and

f=1 to 200,

with the proviso that the sum of b+d is ≧1, with

B) vinylalkoxysilanes of the general formula (II),

in which

R 2 , R 3 , and R 4 are identical or different alkyl, alkoxy, aryl, aryloxy or alkenyl radicals having 1 to 20 carbon atoms, with the proviso that at least one radical is an alkoxy group, and

C) vinylcyclohexene oxide,

with the proviso that the molar ratio n(vinylalkoxysilane)/n(vinylcyclohexene oxide) is >1.

4. The process as claimed in claim 3 , wherein R 2 ═R 3 ═R 4 ═OCH 3 .

5. The process as claimed in claim 3 , wherein R 2 ═R 3 ═R 4 ═OC 2 H 5 .