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Water-based two-component in-mould coating for self-bonded polyurethane material and preparation method of water-based two-component in-mould coating

A water-based two-component, polyurethane material technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor safety, high requirements for coating products, poor flexibility of paint films, etc., to improve odor and VOC, increase product The effect of yield, excellent surface properties

Inactive Publication Date: 2018-07-20
BOMEX CHEM SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] ①The environmental protection effect is poor, the organic solvent (VOC) content of solvent-based products is greater than 500g / L; the final product paint film VOC emission>500ug / m3
[0008] ② Poor safety: mainly solvent-based products, most of which are flammable and dangerous goods, and few water-based products
[0009] ③ Some industries (such as automobile industry, medical device industry) have high requirements for coating products, and many ordinary coatings cannot meet the standards
[0010] ④ Poor adhesion of paint film to self-skinning polyurethane foam material
[0011] ⑤ The flexibility of the paint film is poor, which cannot match the toughness of the self-skinning polyurethane material itself

Method used

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  • Water-based two-component in-mould coating for self-bonded polyurethane material and preparation method of water-based two-component in-mould coating
  • Water-based two-component in-mould coating for self-bonded polyurethane material and preparation method of water-based two-component in-mould coating
  • Water-based two-component in-mould coating for self-bonded polyurethane material and preparation method of water-based two-component in-mould coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation of embodiment 1 waterborne two-component in-mold paint

[0047] Water-based two-component in-mold paint for self-skinning polyurethane materials, its formula includes the following components, in terms of mass percentages:

[0048] The formula of component A in-mold paint includes the following ingredients, in terms of mass percentage:

[0049]

[0050]

[0051] B component curing agent is Bayhydur 304 hydrophilic isocyanate from Covestro;

[0052] The distribution ratio of component A and group B is A:B=:100:2-20, unit mass ratio.

[0053] The preferred formula includes the following ingredients, and the formula of the A-component in-mold paint includes the following ingredients, according to the mass percentage of the A component:

[0054]

[0055] B component curing agent is Bayhydur 304 hydrophilic isocyanate from Covestro;

[0056] The distribution ratio of A component and B group is A:B=:, unit.

[0057] The waterborne polyurethane is ...

Embodiment 2

[0070] The detection of embodiment 2 waterborne two-component in-mold paint

[0071] Mainly investigate the technical indicators of paint film performance, according to the standard TL52045:2013 method:

[0072] (1) Environmental cycle test

[0073] (2) Thermal aging test

[0074](3) light resistance test

[0075] (4) Friction resistance test

[0076] (5)Sunshine simulation

[0077] (6) Elongation

[0078] (7) Drop test

[0079] (8) Anti-Hand Cream Face Cream

[0080] The commercially available solvent-based two-component product was used as a comparison, see Table 2.

[0081] Table 2 Detection of performance of water-based two-component in-mold paint

[0082]

[0083]

[0084] The water-based two-component in-mold paint prepared by the invention is safe, environment-friendly and has good performance.

[0085] ①Environmental protection: the content of solvent (VOC) in the product is reduced from the original (solvent) greater than 500g / l to less than 50g / l, whic...

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Abstract

The invention discloses a water-based two-component in-mould coating for a self-bonded polyurethane material and a preparation method of the water-based two-component in-mould coating. The prepared product is the water-based two-component in-mould coating, and is mainly applied to the self-bonded polyurethane material so as to provide coloring, decorating and protecting effects of components of the polyurethane material and the like. At present, the water-based two-component in-mould coating is mainly applied to industries such as PU steering wheels, in-vehicle armrests, medical apparatuses and instruments and furniture and the like. The product is high in covering power and excellent in coloring force, and has good adhesion, wear resistance and flexibility. The using method of the productcomprises the steps: at first, spraying a solvent or water-based release agent into a mold, and then uniformly spraying the water-based two-component in-mould coating; and spraying or pouring a polyurethane material, performing mold assembly, foaming and completely curing, demolding, and enabling the in-mould coating to be uniformly attached to the surface of the product.

Description

technical field [0001] The invention is a water-based two-component in-mold paint for the application of polyurethane materials. It forms a diffusion layer with cast or injected PU materials, exhibits excellent adhesion, further improves the odor and VOC of automotive interior materials, and at the same time gives the steering wheel Excellent surface properties, including abrasion resistance, solvent resistance and weather resistance. Background technique [0002] At present, most of the coating products on the market are used after the product is formed, and the coating is applied to the surface of the product by spraying, roller coating, curtain coating and other methods. The in-mold paint is the paint that is sprayed before the mold is formed. The difference is that the general paint is applied after the product (workpiece) is formed, while the in-mold paint is sprayed before the product is formed. [0003] Polyurethane material is one of the synthetic resins with excell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/20
Inventor 袁黎峰吕一军彭庆益
Owner BOMEX CHEM SHANGHAI
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