Novel nonionic siloxane surfactants

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1992 English Publisher:WileyJournal:Applied Organometallic Chemistry, volume 6, pages 701-708 (issn: 0268-2605, eissn: 1099-0739,

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Authors: R Wersig; G Sonnek; C Niemann;

doi: 10.1002/aoc.590060810

Novel nonionic siloxane surfactants

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Abstract

AbstractA new method for ethoxylation without application of pressure is described. Butynediololigo(oxyethylene) [H(OCH2CH2)nOCH2CCCH2O(CH2CH2O)nH with n=1–16] has been prepared in the presence of an electrophilic catalyst in a specially developed reciruculating apparatus. The products have been characterized by NMR and IR spectroscopy.New nonionic silicone surfactants have been synthesized by hydrosilylation of these butynediololigo(oxyethylenes) with defined siloxanes and polysiloxanes. Protection of the hydroxyl group before hydrosilylation was not necessary. Hydrosilylation was carried out in the presence of a solvent. It has been possible to obtain surfactants with a surface tension of about 21‐22 mN m−1 and an interfacial tension of 2 mN m−1.

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