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Self-repairing waterborne car repair varnish and preparation method thereof

A self-healing, water-based technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as unsatisfactory requirements, reduced service life, scratch cracks, etc., achieve good water dilution, change consumption habits, and low VOC The effect of emissions

Inactive Publication Date: 2018-06-29
DONGLAI COATING TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of the car, or in the harsh environment with large temperature and humidity differences and large wind and sand, it is inevitable that the car will be scratched, resulting in a certain degree of scratches and cracks, which not only affect the appearance, but also shorten the service life
At present, people's demand for automobile consumption continues to rise, and the green environmental protection and low pollution of automobile coating products will definitely become the first research topic in the automobile industry chain. However, the repair varnishes commonly used on car bodies on the market cannot meet the requirements. There is an urgent need for a Self-healing water-based automotive refinish varnish

Method used

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  • Self-repairing waterborne car repair varnish and preparation method thereof
  • Self-repairing waterborne car repair varnish and preparation method thereof
  • Self-repairing waterborne car repair varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation of self-repairing water-based automobile refinishing varnish, prepares materials by following components:

[0032]

[0033]

[0034] Prepare as follows:

[0035] 1. Preparation of component A

[0036] Add BASF Joncryl OH 8312 resin into the dispersion tank, stir for 5-10 minutes at the speed of the mixer at 300-600rpm, then add BASF foamstar SI 2280, BASF Dispex Ultra PX 4585, BASF Hydropalat WE 3221, dimethylethanolamine, Rohm and Haas 640, propylene glycol methyl ether acetate and deionized water. Stir at the rotating speed of 1500-2000rpm afterwards 15-20min, stand for a period of time and promptly obtain component A.

[0037] 2. Preparation of component B

[0038] Add the modified isocyanate curing agent into the dispersion tank, stir at the mixer speed of 300-600rpm for 5-10 minutes, add propylene glycol methyl ether acetate while stirring, then increase the mixer speed to 800-1000rpm, stir for 15- After 20 minutes, let it stand for ...

Embodiment 2

[0045] A kind of preparation of self-repairing water-based automobile refinishing varnish, prepares materials by following components:

[0046]

[0047] Prepare as follows:

[0048] 1. Preparation of component A

[0049] Add BASF Joncryl OH 8311 resin into the dispersion tank, stir for 5-10 minutes at the mixer speed of 300-600rpm, then add Digo foamex830, BASF Dispex Ultra PX 4585, BASFHydropalat WE 3322, dimethylethanolamine, Rohm Haas 640, Propylene Glycol Methyl Ether Acetate, Ethylene Glycol Butyl Ether Acetate, and Deionized Water. Stir for 15-20min under the rotating speed of 1500-2000rpm afterwards, stand still for a period of time and promptly obtain component A.

[0050] 2. Preparation of component B

[0051] Add the modified isocyanate curing agent into the dispersion tank, stir at the mixer speed of 300-600rpm for 5-10 minutes, add propylene glycol methyl ether acetate while stirring, then increase the mixer speed to 800-1000rpm, stir for 15- After 20 minute...

Embodiment 3

[0058] A kind of preparation of self-repairing water-based automobile refinishing varnish, prepares materials by following components:

[0059]

[0060] Concrete preparation method is with embodiment 1.

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Abstract

The invention relates to self-repairing waterborne car repair varnish and a preparation method thereof. The repair varnish contains a component A and a component B, wherein the component A is preparedfrom elements in parts by weight as follows: 60-80 parts of waterborne acrylic resin, 0.1-0.5 parts of a defoaming agent, 1-5 parts of a dispersing agent, 0.2-0.5 parts of a wetting agent, 0.2-0.5 parts of an amine neutralizer, 0.1-1 part of an antibacterial pesticide, 1-10 parts of a solvent and 10-20 parts of deionized water; the component B is prepared from elements in parts by weight as follows: 60-80 parts of a modified isocyanate curing agent and 20-40 parts of a solvent. Compared with the prior art, the repair varnish has excellent paint film flexibility and ductility and can perform self-repairing on a paint film when slight scratch occurs, furthermore, the preparation technology is simple, production cost is low, particularly, VOC (volatile organic compound) emission caused by spraying is reduced from the source, and the repair varnish has a positive effect on environmental pollution treatment work.

Description

technical field [0001] The invention belongs to the technical field of automobile coatings, and in particular relates to a self-repairable water-based automobile repair varnish and a preparation method thereof. Background technique [0002] Compared with traditional solvent-based paints, water-based paints are more environmentally friendly and have been more and more favored and concerned by the market. During the use of the car, or in the harsh environment with large temperature and humidity differences and strong wind and sand, it is inevitable that the car will be scratched, resulting in a certain degree of scratches and cracks, which not only affect the appearance, but also shorten the service life. At present, people's demand for automobile consumption continues to rise, and the green environmental protection and low pollution of automobile coating products will definitely become the first research topic in the automobile industry chain. However, the repair varnishes co...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/20C09D5/00
CPCC09D5/00C09D175/04
Inventor 朱忠敏刘莉春
Owner DONGLAI COATING TECH SHANGHAI
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