Self-repairing emulsion with core-shell structure as well as preparation method and application thereof

A core-shell structure, self-healing technology, applied in the direction of coating, etc., can solve the problems of high price, difficult industrialization of multiple hydrogen bond monomers, and low cost performance

Active Publication Date: 2021-05-28
WANHUA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, polyurethane emulsion is expensive, and it is difficult to industrialize multiple hydrogen-bonded monomers, and the cost performance is low, which cannot meet most market demands.

Method used

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  • Self-repairing emulsion with core-shell structure as well as preparation method and application thereof
  • Self-repairing emulsion with core-shell structure as well as preparation method and application thereof
  • Self-repairing emulsion with core-shell structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Prepare the self-healing emulsion with core-shell structure according to the composition and consumption of raw materials in Table 1 and the following steps:

[0063] a. Add still bottom liquid A to the polymerization kettle with stirring device, condenser and peristaltic pump feeding device;

[0064] b. Add pre-emulsion B1 to the first pre-emulsification tank, stir and mix evenly for later use;

[0065] c. Add thermal initiator solution C1 to thermal initiator tank one;

[0066] d. Add pre-emulsion B2 to the second pre-emulsion, stir and mix evenly for later use;

[0067] E, add thermal initiator solution C2 in thermal initiator tank two;

[0068] f. When the temperature in the polymerization tank reaches 80°C, add 10% of the pre-emulsion B1 and 10% of the thermal initiator solution C1 into the tank, and then add the remaining pre-emulsion B1 and thermal initiator dropwise to the polymerization tank at the same time. Initiator solution C1; when pre-emulsion B1 and C1 ...

Embodiment 2-5

[0074] The self-healing emulsion was prepared according to the raw material composition in Table 1, and other operating conditions and methods were the same as in Example 1.

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Abstract

The invention discloses a self-repairing emulsion with a core-shell structure as well as a preparation method and application thereof. The emulsion is prepared from the following components in parts by mass: 4.5-7.5 parts of an emulsifier; 8-13 parts of a soft monomer; 28-44 parts of a hard monomer; 1.1-2.3 parts of acrylic acid; 1.5-4 parts of N-butoxy methyl acrylamide; 1.5-4 parts of ethylidene urea ethyoxyl methacrylate; 1-2 parts of acrylonitrile; 3.5-7.5 parts of a thermal initiator; and 45-55 parts of water. According to the invention, a large number of N-H bonds and CN bonds with very high polarity are introduced, so that the self-repairing capability is realized, and the resin has a relatively low film-forming temperature under the condition of a relatively high glass transition temperature, so that the stain resistance and scrubbing resistance of the coating can be greatly improved.

Description

technical field [0001] The invention relates to a self-repairing emulsion, in particular to a self-repairing emulsion with a core-shell structure and a preparation method and application thereof, belonging to the field of coatings. Background technique [0002] At present, after the application of flat coatings for exterior walls, the base material of the wall undergoes shape changes such as shrinkage and expansion with the change of service life and external temperature, which often leads to cracks in the continuous and dense paint film of the flat topcoat commonly used for exterior walls, affecting Exterior. In order to solve this problem, a layer of elastic coating with certain tensile properties is usually applied to achieve the effect of resisting the deformation of the wall substrate and covering the cracks; however, the resin used in the elastic coating to maintain its performance often has a glass transition temperature Low, which leads to the characteristics of sof...

Claims

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Application Information

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IPC IPC(8): C08F265/06C08F257/02C08F220/14C08F212/08C08F220/18C08F220/06C08F220/44C08F220/58C08F220/36C09D151/00C09D7/61
CPCC08F265/06C08F257/02C09D151/003C09D7/61C08K2003/265C08K2003/2241C08F220/14C08F212/08C08F220/1804C08F220/1808C08F220/1802C08F220/06C08F220/44C08F220/58C08F220/36C08K13/02C08K3/22C08K3/346C08K3/26
Inventor 钱宣羽景传明贾贵玉吉晓军
Owner WANHUA CHEM GRP
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