Superspreading wetting agent and preparation method thereof

A wetting agent and super-spreading technology, applied in the direction of adhesive additives, polymer adhesive additives, coatings, etc. High tension problems, to achieve the effect of low dynamic surface tension

Inactive Publication Date: 2020-02-21
福建华夏蓝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above small molecule wetting agents, modified polyether wetting agents and silicone wetting agents all have a good wetting effect on the substrate, and the silicone wetting agent is due to the extremely low surface tension, and some optimized The structure can achieve super-spreading effect; however, due to the disturbance and dispersion during use, there will be more foam, which may affect the performance of the final product
The electron-withdrawing structural characteristics of the alkyne group of the acetylenic diol wetting agent determine its low foaming property, but on the one hand, due to the high surface tension of the hydrophobic group alkyne group in the acetylenic diol (about 30 mN / m), the other On the one hand, the proportion of hydrophilic groups is high, the compatibility with water-based systems is too good, and the critical micelle concentration (CMC) in the system is relatively high. Therefore, in practical applications, the amount of acetylenic diol wetting agent used is difficult Achieve super spreading effect

Method used

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  • Superspreading wetting agent and preparation method thereof
  • Superspreading wetting agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The preparation method of super-spreading wetting agent of the present invention is:

[0026] (1) Add 0.001 mol of catalyst lithium hydroxide to 1 mol of 5,8-dimethyl-6-dodeyn-5,8-diol after dehydration by molecular sieve, and pass through 8 mol of epoxy Ethane, heat up to 90°C, keep the temperature for 3 hours, then cool down to 40°C; pass the reaction product into an ethanol-activated mixed-bed ion exchange column to remove the catalyst, and obtain acetylene glycol polyoxyethylene ether-0400;

[0027] (2) Add the methanol solution containing 2 mol of potassium methylate into the acetylenic glycol polyoxyethylene ether-0400, raise the temperature to 65°C and maintain a slight boiling state, slowly distill out the methanol, keep it for 2 hours, and then distill off the residual methanol under reduced pressure; Cool to 25°C to obtain acetylenic glycol polyoxyethylene ether-0400 potassium salt;

[0028] (3) Add 2.2 mol of sulfonyl chloride dropwise into 2 mol of 3-(3-hyd...

Embodiment 2

[0031] The preparation method of super-spreading wetting agent of the present invention is:

[0032] (1) Add 0.004 mol of catalyst potassium hydroxide to 1 mol of 3-hexyne-2,5-diol after molecular sieve dehydration, and add 12 mol of propylene oxide under the protection of nitrogen. hour, lower the temperature to 35°C; pass the reaction product into an ethanol-activated mixed-bed ion-exchange column to remove the catalyst, and obtain acetylene glycol polyoxypropylene ether-0006;

[0033] (2) Add the ethanol solution containing 2 mol sodium ethoxide into the acetylene glycol polyoxypropylene ether-0006, raise the temperature to 80°C and keep it in a slightly boiling state, and slowly distill the ethanol out, keep it for 4 hours and then distill it off under reduced pressure to remove the residual ethanol ; Cool to 25°C to obtain acetylene glycol polyoxypropylene ether-0006 sodium salt;

[0034] (3) Add 2.8 mol of thionyl chloride dropwise into 2 mol of 3-(3-hydroxymethyl)hepta...

Embodiment 3

[0037] The preparation method of super-spreading wetting agent of the present invention is:

[0038] (1) Add 0.005 mol catalyst zinc hexacyanocobaltate to 1 mol of 2,5-dimethyl-3-hexyne-2,5-diol after dehydration by molecular sieve, and pass it into 22 mol ring Ethylene oxide and 8 mol propylene oxide are heated up to 120°C, kept at a constant temperature for 9 hours, and cooled to 35°C; the reaction product is passed into an ethanol-activated mixed-bed ion exchange column to remove the catalyst, and the acetylene glycol polyoxyethylene poly Oxypropylene ether-1104;

[0039] (2) Add 1 mol potassium ethoxide ethanol solution and 1 mol potassium methoxide ethanol solution into acetylene glycol polyoxyethylene polyoxypropylene ether-1104, raise the temperature to 65°C and keep it in a slightly boiling state for 2 hours, and slowly distill out Methanol, after the methanol is basically evaporated, the temperature is raised to 78°C to slowly distill ethanol out, and the residual et...

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Abstract

The invention discloses a superspreading wetting agent. The superspreading wetting agent is silane-modified acetylenic diol polyether. The critical micelle concentration of the superspreading wettingagent in water is low; the superspreading wetting agent shows a superspreading phenomenon on the surface of a substrate and has an excellent wetting effect on the substrate; the superspreading wettingagent is short in balance time in a water-based system, and the tension difference between the inner surfaces and the outer surfaces of bubbles is large, so the Gibbs-Marangoni effect is counteractedand the bubbles are rapidly broken; and the superspreading wetting agent is a surfactant with unstable bubbles.

Description

technical field [0001] The invention relates to a super-spreading wetting agent and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of people's requirements for environmental protection, water-based adhesives and water-based coatings have come to the stage and gradually replaced solvent-based adhesives and coatings. Both water-based adhesives and water-based coatings use water as the dispersion medium, which avoids a large number of solvents that are harmful to the human body and the environment, saves social resources, and makes an indelible contribution to sustainable development. Due to the high surface tension of water (72 mN / m), it is difficult to wet most substrates. In practical applications, wetting agents are often added to promote the wetting of the system to the substrate. Wetting agents are a class of surfactants that can make solid materials more easily wetted by water or other liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G65/336C09D7/65C09J11/08
CPCC08G65/2609C08G65/336C08G65/2648C08G65/266C09D7/65C09J11/08C08G2650/04C08L71/02
Inventor 邱元进饶长贵陈国栋
Owner 福建华夏蓝新材料科技有限公司
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