Anionic silicone surfactant and method of its manufacture

Details Anionic silicone surfactant and method of its manufacture Anionic silicone surfactant and method of its manufacture

1989-12-14

1991-11-26

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556413, C07F 708, C07F 710

Patent

active

050683802

ABSTRACT:
An anionic silicone surfactant, with excellent surface tension lowering properties in aqueous and solvent systems, of the general formula ##STR1## wherein each R.sup.1 is an unsubstituted or halogen-substituted monovalent hydrocarbon group of 1-20 carbon atoms or a trialkylsiloxy group of 1-20 carbon atoms; R.sup.2 is an unsubstituted, halogen-substituted or hydroxyl-substituted bivalent hydrocarbon group of 1-10 carbon atoms, or a corresponding hydrocarbon group wherein no more than half of the carbon atoms are replaced by an oxygen atom; M is a Group A alkali metal or NR.sup.3 R.sup.4 R.sup.5 wherein R.sup.3, R.sup.4 and R.sup.5 are a hydrogen atom or a monovalent hydrocarbon group of 1-20 carbon atoms; and .sub.a is a number which lies in the range 0.ltoreq.a.ltoreq.20, is produced by reacting a corresponding organopolysiloxane which is terminated at one end by a silicon atom bearing a hydrogen atom with a compound of the general formula ##STR2## in the presence of a platinum catalyst, and reacting the thus-produced epoxy group-terminated organopolysiloxane with sodium or potassium bisulfite.

REFERENCES:
patent: 4717498 (1988-01-01), Maxon
patent: 4777277 (1988-10-01), Colas et al.
patent: 4814471 (1989-03-01), Renauld

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