Alkoxyalkylsilane-modified polysiloxanes and processes for the production thereof

1. A process for producing alkoxyalkylsilane-modified polysiloxanes of the following general formula P:

in which, independently of one another:

R 1 represents R 2 or OR 5 , wherein R 5 is a hydrogen (H) atom or a linear or branched, saturated or unsaturated, optionally substituted hydrocarbon radical with 1 to 8 carbon atoms, and R 5 represents a monovalent hydrocarbon radical with 1 or 2 carbon atoms;

R 2 represents R 1 or an oxime radical of formula —O—N═C—R 7 , wherein R 7 is a linear hydrocarbon radical with 4 carbon atoms, or a cyclic hydrocarbon radical with 6 carbon atoms;

R 3 is R 1 or R 2 or a monovalent SiC-bonded saturated hydrocarbon radical with 1 to 8 carbon atoms, or a hydrocarbon radical with a terminal carbon-carbon double bond with 2 carbon atoms;

R 4 is an aliphatic hydrocarbon radical with 1 to 30 carbon atoms, a phenyl radical, and/or a polyether radical of general formula

(CH 2 ) 3 O(C 2 H 4 O) w (C 3 H 6 O) x (C 4 H 8 O) y Q, in which w, x, y are independently the same or different and respectively represent a number from 0 to 50; and

Q represents a hydrogen atom or an aliphatic hydrocarbon radical with 1 to 4 carbon atoms;

Z is a divalent SiC-bonded saturated hydrocarbon radical with 2 carbon atoms;

m is an integer of from 1 to 200,

n is an integer of from 1 to 1000,

o is an integer of from 0 to 50,

p is an integer of from 1 to 50,

q is an integer of from 1 to 50,

wherein Formula P is produced in which a first organosiloxane (a) has two or more terminal vinyl reactive groups and a second organosiloxane (b) has at least one non-terminal reactive SiH group and terminal reactive Si—R 6 groups, wherein R 6 is a hydrogen or methyl radical are contacted and reacted with one another in the presence of an alkoxyvinylsilane (c) having a terminal vinyl reactive group, wherein the ratio of vinyl reactive groups contained in the first organosiloxane (a) and in the alkoxyvinylsilane (c) to the number of Si—H bonds in the second organosiloxane (b) is within a range of from 1.5:1 to 1:1 and

characterized in that the first organosiloxane (a) is a dimethylsiloxane having two or more terminal vinyl groups bonded to silicon, of the following general formula A:

said alkoxyvinylsilane (c) has the general formula C:

2. The process according to claim 1 , characterized in that the second organosiloxane (b) has one or more terminal and/or pendant Si—H groups, and is a molecule according to the following general formula B:

n which, independently of one another:

R 4 is an aliphatic hydrocarbon radical with 1 to 30 carbon atoms, a phenyl radical, and/or a polyether radical of general formula (CH2)3O(C2H4O)w(C3H6O)x(C4H8O)yQ, in which w, x, y are independently the same or different and represent a number from 0 to 50; and

Q represents a hydrogen atom or an alkyl radical with 1 to 4 carbon atoms;

R6 is a hydrogen atom or a methyl radical;

m is an integer of from 1 to 100, and

o is an integer of from 0 to 20.

3. The process according to claim 1 , characterized by being performed in the presence of a catalyst (d), being a hydrosilylation catalyst containing platinum.

4. The process according to claim 3 , characterized in that the catalyst (d) is employed in such an amount that the content of platinum is from 1 to 100 ppm.

5. The process according to claim 1 , characterized in that the reaction is performed at a temperature within a range of from −20° C. to 200° C.

6. A silicone adhesive, silicone sealant or silicone coating agent containing the polysiloxane of claim 1 .

7. The silicone adhesive, silicone sealant or silicone coating agent of claim 6 , wherein said silicone adhesive, silicone sealant or silicone coating agent cures at room temperature.

8. An alkoxyalkylsilane-modified polysiloxane of the following general formula P:

in which, independently of one another:

R 1 represents R 2 or OR 5 , wherein R 5 is a hydrogen (H) atom or a linear or branched, saturated or unsaturated, optionally substituted hydrocarbon radical with 1 to 8 carbon atoms;

R 2 represents R 1 or an oxime radical of formula —O—N═C—R 7 wherein R 7 is a linear hydrocarbon radical with 4 carbon atoms, or a cyclic hydrocarbon radical with 6 carbon atoms;

R 3 is R 1 or R 2 or a monovalent SiC-bonded saturated hydrocarbon radical with 1 to 8 carbon atoms, or a hydrocarbon radical with a terminal carbon-carbon double bond with 2 carbon atoms;

R 4 is an aliphatic hydrocarbon radical with 1 to 30 carbon atoms, a phenyl radical, and/or a polyether radical of general formula

(CH 2 ) 3 O(C 2 H 4 O) w (C 3 H 6 O) x (C 4 H 8 O) y Q, in which w, x, y are independently the same or different and respectively represent a number from 0 to 50; and

Q represents a hydrogen atom or an aliphatic hydrocarbon radical with 1 to 4 carbon atoms;

Z is a divalent SiC-bonded saturated hydrocarbon radical with 2 carbon atoms;

m is an integer of from 1 to 200,

n is an integer of from 1 to 1000,

o is an integer of from 0 to 50,

p is an integer of from 1 to 50,

q is an integer of from 1 to 50,

wherein Formula P is produced in which a first organosiloxane (a) has two or more terminal vinyl reactive groups and a second organosiloxane (b) has at least two reactive SiH group are contacted with one another in the presence of an alkoxyvinylsilane (c) having a terminal vinyl reactive group, wherein the ratio of vinyl reactive groups contained in the first organosiloxane (a) and in the alkoxyvinylsilane (c) to the number of Si-H bonds in the second organosiloxane (b) is within a range of from 1.5:1 to 1:1 and said alkoxyvinylsilane (c) has the general formula C:

9. The polysiloxane according to claim 8 , characterized by having a viscosity of from 200 mPa·s to 1,000,000 mPa·s at 20° C.

10. The polysiloxane of claim 9 , wherein R 5 represents a monovalent hydrocarbon radical with 1 or 2 carbon atoms.

11. The polysiloxane of claim 8 , wherein n is an integer of from 1-200.

12. A process for producing alkoxyalkylsilane-modified polysiloxanes of the following general formula P:

in which, independently of one another:

R 1 represents R 2 or OR 5 , wherein R 5 is a hydrogen (H) atom or a linear or branched, saturated or unsaturated, optionally substituted hydrocarbon radical with 1 to 8 carbon atoms, and R 5 represents a monovalent hydrocarbon radical with 1 or 2 carbon atoms;

R 2 represents R 1 or an oxime radical of formula —O—N═C—R 7 , wherein R 7 is a linear hydrocarbon radical with 4 carbon atoms, or a cyclic hydrocarbon radical with 6 carbon atoms;

R 3 is R 1 or R 2 or a monovalent SiC-bonded saturated hydrocarbon radical with 1 to 8 carbon atoms, or a hydrocarbon radical with a terminal carbon-carbon double bond with 2 carbon atoms;

R 4 is an aliphatic hydrocarbon radical with 1 to 30 carbon atoms, a phenyl radical, and/or a polyether radical of general formula

(CH 2 ) 3 O(C 2 H 4 O) w (C 3 H 6 O) x (C 4 H 8 O) y Q, in which w, x, y are independently the same or different and represent a number from 0 to 50; and

Q represents a hydrogen atom or an alkyl radical with 1 to 4 carbon atoms;

Z is a divalent SiC-bonded saturated hydrocarbon radical with 2 carbon atoms;

m is an integer of from 1 to 200,

n is an integer of from 1 to 1000,

o is an integer of from 0 to 50,

p is an integer of from 1 to 50,

q is an integer of from 1 to 50,

wherein Formula P is produced in which a first organosiloxane (a) has two or more terminal vinyl reactive groups and a second organosiloxane (b) has at least two reactive SiH group are contacted and reacted with one another in the presence of an alkoxyvinylsilane (c) having a terminal vinyl reactive group, wherein the ratio of vinyl reactive groups contained in the first organosiloxane (a) and in the alkoxyvinylsilane (c) to the number of Si—H bonds in the second organosiloxane (b) is within a range of from 1.5 : 1 to 1 : 1 and

characterized in that the first organosiloxane (a) is a dimethylsiloxane having two or more terminal vinyl groups bonded to silicon, of the following general formula A:

said alkoxyvinylsilane (c) has the general formula C: