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US 8,013,097 B2Granted
Silicone polyether block copolymers having organofunctional endblocking groups
AssigneeDow Corning Corporation
InventorsJohn Kennan, Kevin Lewis, Fernando Vazquez
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Abstract
Silicone polyether copolymers are disclosed having the average formula E-B-[AB]n-E where E is an organofunctional endblocking group, B is a diorganopolysiloxane, A is a divalent organic group comprising at least one polyether group, and n is ≧1. The silicone polyether copolymers having an amine functional endblocking group are useful in the treatment of textiles and fibers.
Claims18
A silicone polyether copolymer having the average formula;
- E-B-[AB]n-E
- where E is an organofunctional endblocking group having the formula RACH2CH(OH)CH2OR2, or
- where RA is a monovalent amine functional group and R2 is a divalent hydrocarbon linking group containing 2 to 6 carbon atoms,
- B is a diorganopolysiloxane,
- A is a divalent organic group comprising at least one polyether group, and
- n is ≧1.
3 more elements
A process to prepare a silicone polyether block copolymer comprising:
- I) reacting;
- A) a polyoxyalkylene having an unsaturated hydrocarbon group at each molecular terminal
- B) a SiH terminated organopolysiloxane,
- C) a hydrosilylation catalyst,
- D) an optional solvent,
- where the molar ratio of B/A is greater than one,
- II) further reacting the product of step I with;
- E) an epoxide having at least one aliphatic unsaturated hydrocarbon group
- to form an epoxide terminal silicone polyether block copolymer,
- III) reacting the epoxide terminal silicone polyether block copolymer with
- F) an amine compound
- to form an amine terminal silicone polyether block copolymer.
9 more elements
Dependencies are inferred from the claim text.