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Polymer emulsifier, and preparation method and application thereof

A polymer emulsifier and esterification technology, applied in chemical instruments and methods, coatings, anti-corrosion coatings, etc., can solve problems that affect the storage stability of resins or coatings, the hydrophilicity of resins cannot be adjusted, and restrict the application of paints, etc. , to achieve excellent emulsifying ability, strong affinity, and improve the effect of anti-corrosion

Pending Publication Date: 2021-12-14
绵阳麦思威尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems: (1) Although the water dilutability of the resin can be achieved, the obtained resin usually has a high viscosity, and a large amount of organic co-solvent needs to be added in the later stage of the paint, which indirectly sacrifices the VOCs index (2) Due to the introduction of a large number of hydrophilic groups into the molecule, these hydrophilic groups are usually located in the polyester molecular chain segment and are distributed irregularly. When the solvent system changes or the ambient temperature changes, the macromolecule occurs After winding and curling, the hydrophilic groups are isolated and the hydrophilicity changes, which affects the storage stability of the resin or coating; (3) the hydrophilicity of the resin cannot be flexibly adjusted according to the application scene, which restricts the application of later paint making

Method used

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  • Polymer emulsifier, and preparation method and application thereof
  • Polymer emulsifier, and preparation method and application thereof

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preparation example Construction

[0024] First, the invention provides a kind of preparation method of polymer emulsifier, comprises the steps:

[0025] S1 Fatty acid, vegetable oleic acid and polyhydric alcohol are blended, and the first intermediate is obtained through esterification and dehydration;

[0026] S2 Add tristyrylphenol polyoxyethylene-polyoxypropylene block polyether to the first intermediate for blending, and then phosphorylate to obtain the second intermediate;

[0027] The second intermediate of S3 is neutralized by amine to obtain a polymer emulsifier.

[0028] specifically,

[0029] S1 Fatty acid, vegetable oleic acid and polyols are blended, nitrogen gas is introduced, the temperature is raised to 180-220°C and heat preservation treatment is carried out, the first intermediate is obtained by esterification and dehydration, and the temperature is lowered to 50-75°C.

[0030] S2 Add tristyrylphenol polyoxyethylene-polyoxypropylene block polyether to the first intermediate for blending, ble...

Embodiment 1

[0045] Add 0.5 mol of catalpa fatty acid, 1.5 mol of oleic acid, and 1 mol of trimethylolpropane into the reactor, pass through nitrogen protection, heat up to 200°C for dehydration and esterification reaction until the acid value is less than 1mgKOH / g, cool down to 60°C; add 1mol Tristyrylphenol polyoxyethylene-polyoxyethylene propylene block polyether (EO:PO=16:2), stir for 30min; add 1mol phosphorus pentoxide in 3 batches, keep warm at 60°C for 2h; add 1mol Deionized water, continue to keep warm for 1h. The temperature was lowered to 40° C., and 1 mol of dimethylethanolamine was added for neutralization, so that the pH value was 7-8, and polymer emulsifier sample 1 was obtained.

Embodiment 2

[0047] Add 1.5 mol of catalpa fatty acid, 0.5 mol of oleic acid, and 1 mol of trimethylolpropane into the reactor, raise the temperature to 200°C, pass through nitrogen protection, dehydrate and esterify until the acid value is less than 1mgKOH / g, cool down to 60°C; add 1mol Tristyrylphenol polyoxyethylene-polyoxypropylene block polyether (EO:PO=16:2), stirred for 30min; added 1mol phosphorus pentoxide in 3 batches, and kept the reaction at 60°C for 2h; added 1mol to Ionized water, continue to keep warm for 1h. Cool down to 40°C, add 1mol dimethylethanolamine for neutralization, make the pH value 7-8, and obtain polymer emulsifier sample 2.

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Abstract

The invention relates to the technical field of polymer synthesis, and discloses a polymer emulsifier, and a preparation method and application thereof. The preparation method comprises the following steps: S1, blending grease fatty acid, vegetable oleic acid and polyol, and carrying out esterification dehydration to obtain a first intermediate; S2, adding tristyrylphenol polyoxyethylene-polyoxypropylene block polyether into the first intermediate, blending, and then performing phosphorylation treatment to obtain a second intermediate; and S3, neutralizing the second intermediate with amine to obtain the polymer emulsifier. The polymer emulsifier obtained by the invention is excellent in emulsifying property, low-viscosity water-based alkyd resin and coating can be obtained in the presence of a small amount of cosolvent, and VOCs of the coating can be reduced.

Description

technical field [0001] The invention relates to the technical field of polymer synthesis, in particular to a polymer emulsifier, a preparation method thereof, and an application thereof. Background technique [0002] With the increasing environmental protection awareness of the public and the increasingly stringent environmental protection regulations of various countries, reducing the VOC content in coatings has become a current research hotspot. [0003] The VOCs of traditional oil-based industrial coatings are generally greater than 300g / L, while water-based industrial coatings can be less than 60g / L, or even zero VOCs, which puts forward lower VOCs requirements for the main film-forming substance of water-based coatings-resin. In the process of making the resin water-based and reducing resin VOCs, traditional resins mostly adopt the method of directly introducing hydrophilic groups into polymer resins to achieve the above goals. However, this method has the following pr...

Claims

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Application Information

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IPC IPC(8): C08G65/338B01F17/52C08J3/03C09D167/08C09D5/08C09K23/52
CPCC08G65/338C08J3/03C09D167/08C09D5/08C08J2367/08
Inventor 陆小辉闫辉管莹唐友江
Owner 绵阳麦思威尔科技有限公司
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