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Twin-structured polyether siloxane and preparation method

A technology of polyether siloxane and twins, which is applied in the direction of chemical instruments and methods, silicon organic compounds, coatings, etc., can solve problems affecting construction efficiency, shrinkage of construction substrates, and reduction of wetting effect, and achieve excellent elimination The effect of anti-foaming effect

Inactive Publication Date: 2019-07-23
RUNHE ORGANICSILICONE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyether-modified trisiloxane surfactants such as Momentive High-tech Materials CoatOSil 77 and Dow Corning OFX-5211, etc., under alkaline (PH>8) conditions, the molecules are further condensed to form higher molecular weight polyethers Siloxane, which causes the surface tension to increase and the wetting effect to decrease. As a water-based coating wetting agent, a large amount of foam will appear during the dynamic construction process, which will affect the construction efficiency. After a long time, the construction substrate will have shrinkage cavities and crater effects. Phenomena that affect the use effect of the product

Method used

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  • Twin-structured polyether siloxane and preparation method
  • Twin-structured polyether siloxane and preparation method
  • Twin-structured polyether siloxane and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In a 250ml dry three-necked bottle equipped with an electric stirrer and a thermometer, add 46 grams of heptamethyltrisiloxane, 100 grams of 2,4,7,9-tetramethyl-5-decyne-4,7- Stir glycol tetraethoxy ether evenly, pass N2, and then raise the temperature. When the temperature rises to 60°C, add 0.2 g of chloroplatinic acid catalyst (the amount of platinum added is equivalent to 10PPM of the total material amount), continue to heat up to 110°C, and react 4h, under the protection of N2, the low components were removed by vacuum, and a light yellow liquid RA was obtained.

Embodiment 2

[0029] In a 250ml dry three-necked bottle equipped with an electric stirrer and a thermometer, add 28 grams of heptamethyltrisiloxane, 100 grams of 2,4,7,9-tetramethyl-5-decyne-4,7- Stir glycol decaethoxy ether evenly, pass N2, and then heat up. When the temperature rises to 70°C, add 0.88 g of chloroplatinic acid catalyst (the amount of platinum added is equivalent to 50PPM of the total material amount), continue to heat up to 120°C, and react 5h, under the protection of N2, the low components were removed by vacuum, and a deep yellow liquid RB was obtained.

Embodiment 3

[0031] In a 250ml dry three-necked bottle equipped with an electric stirrer and a thermometer, add 43 grams of heptamethyltrisiloxane, 100 grams of 2,5,8,11-tetramethyl-6-dodecyne-5, Stir 8-diol tetraethoxy ether evenly, pass N2, and then heat up. When the temperature rises to 80°C, add 1.38 grams of chloroplatinic acid catalyst (the amount of platinum added is equivalent to 70PPM of the total material amount), and continue to heat up to 130°C , Reaction for 6h, under the protection of N2, vacuumize to remove low components, and a brown liquid RC is obtained.

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Abstract

The invention relates to the field of organosilicon surfactants, in particular to twin-structured polyether siloxane and a preparation method. The twin-structured polyether siloxane contains multiplehydrophobic links, two hydrophilic links and a flexible bridge link group, and surface tension of a 0.1% aqueous solution of twin-structured polyether siloxane is 20-30 mN / m; twin-structured polyethersiloxane has defoaming and foam-inhibiting effects and good hydrolysis resistance and can keep long-term wettability. The product serving as a water-based paint wetting leveling agent has excellent defoaming and foam-inhibiting effects and is resistant to hydrolysis under the alkaline condition.

Description

technical field [0001] The invention relates to the field of silicone surfactants, in particular to a polyether siloxane with a twin structure and a preparation method. Background technique [0002] Silicone surfactant is mainly a type of surfactant composed of polydimethylsiloxane as the main chain and containing one or more polar groups in its side chain or terminal. Since the 1960s, it has been used in the industrial field, and it was used on a large scale in the 1980s. This type of surfactant has unique advantages. Silicone surfactants, especially polyether-modified trisiloxane, have a unique "umbrella" structure in their methyl group, which is adsorbed on the adjacent interface between air and water, which can reduce the surface tension to about 20mN / m. Polyether-modified trisiloxane can not only reduce the interfacial tension of the oil-water interface, but also wet and expand on the hydrophobic surface. This ability is called "super wettability" or "super spreadabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/08C09D7/65C08G65/336
CPCC07F7/0838C07F7/0878C08G65/336C09D7/63
Inventor 严明亮廖乐新许振浩陆思琪房小平
Owner RUNHE ORGANICSILICONE NEW MATERIAL
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