Silicone polymer emulsions

• US 6,878,773 B2
• Filed: 01/30/2001
• Issued: 04/12/2005
• Est. Priority Date: 02/11/2000
• Status: Expired due to Term

• Current Assignee: Dow, Inc.
• Original Assignee: Dow, Inc.
• Inventors: Marteaux, Leon Andre, Girboux, Anne-Lise
• Primary Examiner(s): Robertson, Jeffrey B.
• Application Number:
  US10/204,932
• Publication Number:
  US 20030040572A1
• Time in Patent Office: 1,533 Days
• Field of Search: 524/837, 524/588, 524/860, 524/861, 524/862, 525/100, 525/106
• US Class Current: 524/837
• CPC Class Codes: C08G 77/12 containing silicon bound to hydrogen C08G77/045 takes precedence
• CPC Class Codes: C08G 77/44 containing only polysiloxane sequences
• CPC Class Codes: C08G 77/442 containing vinyl polymer sequences
• CPC Class Codes: C08G 77/50 by carbon linkages C08G77/485 takes precedence
• CPC Class Codes: C08J 2383/04 Polysiloxanes
• CPC Class Codes: C08J 3/03 in aqueous media
• CPC Class Codes: C08K 5/01 Hydrocarbons C08K5/0091 takes precedence
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 83/04 Polysiloxanes

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.

Claims

1. 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 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.

2. A process for the preparation of an emulsion of a silicone organic block copolymer in water as claimed in claim 1, further 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.

3. A process according to claim 2 wherein the organic material is a polymer having a backbone of carbon—

carbon bonds.

5. An emulsion of a silicone organic block copolymer in water prepared by the process of claim 1.

6. A process according to claim 1, wherein the organic material is an alpha, omega-diene having 6 to 30 carbon atoms.

7. A process according to claim 1 wherein the catalyst is a Pt^iv compound.

8. A process according to claim 3, wherein the polymer is polyisobutylene.

9. An emulsion of a silicone organic block copolymer in water prepared by the process of claim 1.

4. An emulsion of a silicone organic copolymer in water, wherein 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, wherein the organic blocks are derived from an alpha-omega diene having 6 to 30 carbon atoms.