Silicon polymer emulsions
First Claim
1. A process for the preparation of an emulsion of a silicone organic block copolymer in water, characterised in that a polydiorganosiloxane having terminal Si—
- H groups (A), an organic material having terminal aliphatically unsaturated groups (B) which are reactive with the Si—
H groups (A) and a catalyst are emulsified in water with a surfactant to form an emulsion and the resulting emulsion is subjected to conditions under which the reaction between groups (A) and (B) proceeds in the presence of the catalyst, thereby forming a copolymer chain containing polysiloxane blocks and blocks of organic material.
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Abstract
In a process for the preparation of an emulsion of a silicone organic block copolymer in water, a polydiorganosiloxane having terminal reactive groups (A), an organic material having terminal groups (B) which are reactive with the groups (A) and a catalyst are emulsified in water with a surfactant and the resulting emulsion is subjected to conditions under which the reaction between groups (A) and (B) proceeds in the presence of the catalyst, thereby forming a copolymer chain containing polysiloxane blocks and blocks of organic material. Preferred emulsions comprise a copolymer comprising polydiorganosiloxane blocks and organic blocks, having a viscosity in the range 10 to 1000000 Pa.s and a mean particle size of 0.3 to 1000 micrometers.
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Citations
10 Claims
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1. A process for the preparation of an emulsion of a silicone organic block copolymer in water, characterised in that a polydiorganosiloxane having terminal Si—
- H groups (A), an organic material having terminal aliphatically unsaturated groups (B) which are reactive with the Si—
H groups (A) and a catalyst are emulsified in water with a surfactant to form an emulsion and the resulting emulsion is subjected to conditions under which the reaction between groups (A) and (B) proceeds in the presence of the catalyst, thereby forming a copolymer chain containing polysiloxane blocks and blocks of organic material. - View Dependent Claims (2, 3, 4, 5, 7, 8, 10)
- H groups (A), an organic material having terminal aliphatically unsaturated groups (B) which are reactive with the Si—
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6. A process for the preparation of an emulsion of a silicone organic block copolymer in water, characterised in that a polydiorganosiloxane having terminal reactive groups (A), an organic material having terminal groups (B) which are reactive with the groups (A) and a catalyst are mixed and then emulsified in water with a surfactant to and the resulting is subjected to conditions under which the reaction between groups (A) and (B) proceeds in the presence of the catalyst, thereby forming a copolymer chain containing polysiloxane blocks and blocks of organic material.
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9. An emulsion of a silicone organic copolymer in water, characterised in that the copolymer comprises polydiorganosiloxane blocks and organic blocks and has a viscosity in the range 10 to 1000000 Pa.s and a mean particle size of 0.3 to 1000 micrometers.
Specification