Acid-base resistant polyether modified trisiloxane surfactant as well as preparation and application thereof

Abstract

The invention relates to an acid and alkali resistant polyether modified trisiloxane surfactant and its preparation and application. The general structural formula of the surfactant is: wherein, R1=hydrocarbyl structure, X=NH, O, n= 0-12, m=0-12, R2=H, CH3. Preparation method: under the protection of nitrogen, add unsaturated polyether and catalyst into the solvent, heat the oil bath to 60-65°C, react for 20-30min, then raise the temperature to 70-120°C, then add heptamethyltrisiloxane dropwise Alkanes, reaction 0.5-48h, that is. Used in pesticides, cosmetics, washing, textiles, leather, printing and dyeing, rubber, coatings, paints, automobiles, and mechanical processing. The invention has simple reaction steps, high yield, no biological toxicity, no harmful substances, no or low VOC emission, and is an environmentally friendly, green and pollution-free acid and alkali resistant organic silicon surfactant with high surface activity.

Description

technical field [0001] The invention belongs to the field of surfactants and their preparation and application, in particular to an acid and alkali resistant polyether modified trisiloxane surfactant and its preparation and application. Background technique [0002] In the 1950s, the Union Carbide Corporation of the United States first realized the industrial scale production of silicone surfactants, and later used it as a foam stabilizer for polyurethane foam materials. Due to its remarkable application effect, it not only brought innovations in the molding process of polyurethane foam materials , so that the polyurethane industry has developed by leaps and bounds, and stimulated the rapid development of silicone surfactants. Since the 1980s, silicone surfactants have developed rapidly in an all-round way. Silicone surfactant is a type of surfactant composed of polydimethylsiloxane as its hydrophobic main chain, and one or more organic hydrophilic groups are linked at its ...

AI Technical Summary

Problems solved by technology

[0004] The aqueous solution of traditional polyether-modified trisiloxane surfactant can keep the surface tension at a low level stably under neutral (pH value 6-8); however, the aqueous solution under acidic or alkaline conditions, three Siloxane surfactant molecules will hydrolyze faster and the surface tension will be significantly increased; especially at extreme pH conditions, trisiloxane surfactant molecules will hydrolyze rapidly

The poor acid and alkali stability of trisiloxane surfactants limits its scope of application to a large extent. Therefore, a kind of trisiloxane surfactant with good acid and alkali stability is developed, designed and synthesized, that is, to broaden its It has a good application prospect and broad development space due to the range of pH value it bears during use.

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