Polyfunctional carbosiloxanes with linear and cyclic components

1. Soluble organic-inorganic compositions of oligomeric polyfunctional carbosiloxanes comprising

A) at least one cyclic component of the formula (I),

wherein

R 1 and R 2 may be the same or different and represent linear, branched or cyclic C 1 -C 8 alkyl radicals and/or C 6 -C 14 aryl radicals,

Y is OH or C 1 -C 4 alkoxy,

a is such that 0≦a≦2,

b is such that 0.5≦b≦2.8and a+b≦3,

c is a number ≧3,

n is a number from 2 to 10, and

B) at least one linear component of the formula (II),

wherein

R 1 , R 2 , a, b, n and Y have the definition indicated in the general formula (I),

X 1 is R 1 or —(CH 2 ) n SiR 2 a Y b (O) (3-a-b)/2 ,

d is a number from 1 to 100, and

e is a number from 0 to 50.

2. The soluble organic-inorganic compositions of claim 1 comprising

A) at least one cyclic component of the formula (III)

wherein

f stands for 1.2 to 2,

c is a number ≧3 and

B) at least one linear component of the formula (IV),

wherein

f stands for 1.2 to 2,

g stands for 1 to 30 and

h stands for 0 to 20.

3. The soluble organic-inorganic compositions of claim 1 comprising

A) at least one cyclic component of the formula (V),

wherein

k stands for 0.7 to 1,

c is a number ≧3 and

B) at least one linear component of the formula (VI),

wherein

k stands for 0.7 to 1,

g stands for 1 to 30 and

h stands for 0 to 20.

4. A process for preparing the soluble organic-inorganic compositions of claim 1 , comprising i) reacting a mixture (M1) of linear and cyclic hydrosiloxanes of the formulae (VII) and (VIII),

wherein

R 1 is a linear, branched or cyclic C 1 -C 8 alkyl radical and/or C 6 -C 14 aryl radical,

c is a number ≧3 and

d is a number from 1 to 100,

e is a number from 0 to 50 and

X 2 stands for H or R 1 ,

with silanes of the formula (IX),

R 3 SiR a 2 Z 3-a   (IX)

 wherein

R 2 is a linear, branched or cyclic C 1 -C 8 alkyl radical and/or C 6 -C 14 aryl radical,

a is such that 0≦a≦2,

R 3 is C 2 -C 10 alkenyl and

Z stands for a hydrolysable group,

in the presence of a Pt catalyst to give a mixture (M2) of intermediates, comprising compounds of the formulae (X) and (XI),

 wherein

R 1 , R 2 , Z, a, c, d, n and e are as defined above and

X 3 stands for R 1 or —(CH 2 ) n SiR 2 a Z (3-a) , and

ii) subjecting the mixture (M2) of intermediates to an alcoholysis or hydrolysis with subsequent condensation.

5. The process of claim 4 , wherein in the first step the mixture (M1) is added to the initial silane/catalyst mixture charge in a closed vessel.

6. The process of claim 4 , wherein both steps are carried out in the same reactor.

7. Condensation-crosslinking siloxane compositions comprising the soluble organic-inorganic compositions of claim 1 .

8. Organic or inorganic surface coating materials comprising the soluble organic-inorganic compositions according of claim 1 .