Alkenyl group-containing organo(poly)siloxanes
AssigneeWacker Chemie AG
InventorsRudolf Braun, Karl Braunsperger
Life of this patent
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Abstract
Organo(poly)siloxanes composed of units of the formula [R.sub.a R.sup.1.sub.3-a SiO.sub.1/2 ], [R.sub.b R.sup.1.sub.2-b SiO.sub.2/2 ] and [R.sup.1 SiO.sub.3/2 ], in which R can be the same or different and represents a monovalent organic radical which is free from aliphatic carbon-carbon multiple bonding, R.sup.1 can be the same or different and represents a monovalent organic radical which has at least one aliphatic carbon-carbon multiple bond, a is 0, 1 or 2 and b is 0 or 1.
Claims9
An organo(poly)siloxane composed of units of the formula [R.sub.a R.sup.1.sub.3-a SiO.sub.1/2 ], [R.sub.b R.sup.1.sub.2-b SiO.sub.2/2 ] and [R.sup.1 SiO.sub.3/2 ], in which R is a monovalent organic radical which is free from aliphatic carbon-carbon multiple bonding, R.sup.1 is a monovalent organic radical having at least one aliphatic carbon-carbon multiple bond, a is 0, 1 or 2 and b is 0 or 1.
A process for preparing an organo(poly)siloxane of the formula [R.sub.a R.sup.1.sub.3-a SiO.sub.1/2 ], [R.sub.b R.sup.1.sub.2-b SiO.sub.2/2 ] and [R.sup.1 SiO.sub.3/2 ], in which R is a monovalent organic radical which is free from aliphatic carbon-carbon multiple bonding, R.sup.1 is a monovalent organic radical having at least one aliphatic carbon-carbon multiple bond, a is 0, 1 or 2 and b is 0 or 1, which comprises reacting a silane of the formula
- R.sup.2.sub.c R.sup.3.sub.3-c SiX (II)
- and/or partial hydrolyzates thereof, a silane of the formula
- R.sup.2.sub.d R.sup.3.sub.2-d SiX.sub.2 (III)
- and/or partial hydrolyzates thereof, and a silane of the formula
- R.sup.3 SiX.sub.3 (IV)
- and/or partial hydrolyzates thereof, in which R.sup.2 is a monovalent organic radical which is free from aliphatic carbon-carbon multiple bonding, R.sup.3 is a monovalent organic radical having at least one aliphatic carbon-carbon multiple bond, X is a chlorine atom or a radical --OR.sup.4, in which R.sup.4 is a hydrogen atom or a monovalent organic radical, x is 0, 1 or 2 and d is 0 or 1, in the presence of water, a catalyst and optionally an organic solvent.
Dependencies are inferred from the claim text.