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

A surfactant, polyether modification technology, applied in transportation and packaging, organic silicon compounds, chemical instruments and methods, etc., can solve the problems of poor acid and alkali resistance, limited application range, surface tension increase, etc. Effects of hazardous substances, simple reaction steps, no or low VOC emissions

Active Publication Date: 2014-02-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0030]Add polyethylene glycol monomethyl ether (M.W=350) (17.5g, 50mmol), triethylamine (6.06g, 60mmol) and CH 2 Cl 2 (100mL), magnetically stirred evenly, and acryloyl chloride (4.98g, 55mmol) and CH 2 Cl 2 (30mL) was added to the constant pressure dropping funnel, then placed in an ice bath to cool down to 0°C, and then the liquid in the constant pressure dropping funnel was slowly dropped into the three-necked flask, and after the ice bath was reacted for 1 hour, the The reaction was carried out for 4 hours, and the reaction was stopped. The insoluble matter was separated by suction filtration with a Buchner funnel, the organic phase was collected, washed with acid, alkali and saturated brine in sequence until neutral, and dried with anhydrous magnesium sulfate. The organic solvent was removed under vacuum to obtain a light yellow transparent liquid which was polyethylene glycol monomethyl ether acrylate (17.98 g, 89%).

[0031] 1 HNMR (400MHz, CDCl 3 ): 6.43 (d, 1H),...

Embodiment 2

[0037] Add polyethylene glycol monomethyl ether (M.W=350) (17.5g, 50mmol), triethylamine (6.06g, 60mmol) and CH 2 Cl 2 (100mL), magnetically stirred evenly, 2-butenoyl chloride (5.75g, 55mmol) and CH 2 Cl 2 (30mL) was added to the constant pressure dropping funnel, then placed in an ice bath to cool down to 0°C, and then the liquid in the constant pressure dropping funnel was slowly dropped into the three-necked flask, reacted in the ice bath for 1 hour, and then After reacting at room temperature for 4 hours, the reaction was terminated. The insoluble matter was separated by suction filtration with a Buchner funnel, the organic phase was collected, washed twice with acid water, twice with alkaline water, washed with saturated saline until neutral, and dried over anhydrous magnesium sulfate. The organic solvent was removed under vacuum to obtain polyethylene glycol monomethyl ether crotonate (20.6 g, 91%) as a light yellow transparent liquid.

[0029] 1 HNMR (400MHz, CDCl...

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Abstract

The invention relates to an acid-base resistant polyether modified trisiloxane surfactant as well as preparation and application thereof. The structural formula of the surfactant is shown in the specification: R1 is an alkyl structure; X is equal to NH and O; n is from 0 to 12; m is from 0 to 12; R2 is equal to H and CH3. The preparation method comprises the following steps: under the protection of nitrogen, adding unsaturated polyether and a catalyst in a solvent; heating the oil bath to 60-65 DEG C; taking a reaction for 20-30 min; raising the temperature to 70-120 DEG C; dripping heptamethyltrisiloxane in the liquid to take a reaction for 0.5-48 h, so as to obtain the finished product. The acid-base resistant polyether modified trisiloxane surfactant can be applied to the fields of pesticides, cosmetics, washing, spinning, leather, printing and dyeing, rubber, coating, paint, automobile and machining. The preparation method is simple and convenient in the reaction steps, high in yield, and free from biotoxicity, hazardous substance and VOC (Volatile Organic Compounds) discharge or low VOC discharge. Therefore, the acid-base resistant polyether modified trisiloxane surfactant is environment-friendly, green, and free from pollution, and has 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 ...

Claims

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Application Information

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IPC IPC(8): B01F17/54B01F17/42C07F7/08C08G65/48C09K23/54C09K23/42
Inventor 孟卫东孙建彬
Owner DONGHUA UNIV
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