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Polyurethane coating used on surfaces of polypropylene materials

A polyurethane coating and polypropylene material technology, applied in the coating field, can solve the problems of poor adhesion, paint peeling, and easy to turn white when finger scratching, and achieve the effects of fast drying, high gloss, and good interlayer adhesion.

Inactive Publication Date: 2014-03-12
展辰新材料集团股份有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the existing polyurethane coatings are used on the surface of polypropylene materials (such as polypropylene craft trays), there are technical problems of poor adhesion, mainly manifested as paint falling off when scratched by a knife, whitening when scratched by fingers, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Components are as follows (by weight):

[0033] Bentonite slurry: 88 parts of solvent, 2 parts of dispersant, 10 parts of bentonite;

[0034] Main ingredients: 55 parts of acrylic resin, 5 parts of matte powder, 8 parts of solvent, 5 parts of bentonite slurry, 0.3 parts of defoamer, 0.3 parts of leveling agent, 1 part of adhesion promoter, 1 part of hand feeling aid, 30 parts of filler ;

[0035] Curing agent: 20 parts of TDI trimer, 30 parts of TDI adduct, 50 parts of solvent.

[0036] The preparation method is as follows:

[0037] Bentonite slurry: first add solvent and dispersant to disperse until transparent, then add bentonite while stirring, mix well and then use a grinder to grind to a fineness of less than 50 microns.

[0038] Main ingredient: first add acrylic resin, bentonite slurry, and some solvents, stir evenly, add defoamer and leveling agent while stirring, add mat powder and filler after stirring evenly, disperse at high speed until the fineness is qu...

Embodiment 2

[0042] Components are as follows (by weight):

[0043] Bentonite slurry: 88 parts of solvent, 2 parts of dispersant, 10 parts of bentonite;

[0044] Black pulp: 65 parts of synthetic fatty acid resin, 10 parts of black powder, 3 parts of dispersant, 22 parts of solvent;

[0045] Main ingredients: 30 parts of acrylic resin, 30 parts of black pulp, 8 parts of solvent, 5 parts of bentonite slurry, 0.3 parts of defoamer, 0.3 parts of leveling agent, 1 part of adhesion promoter, 1 part of hand feeling aid, 30 parts of filler .

[0046] Curing agent: 20 parts of TDI trimer, 30 parts of TDI adduct, 50 parts of solvent.

[0047] The preparation method is as follows:

[0048] Bentonite slurry: first add solvent and dispersant to disperse until transparent, then add bentonite while stirring, mix well and then use a grinder to grind to a fineness of less than 50 microns.

[0049]Black pulp: First add synthetic fatty acid resin, solvent, and dispersant to disperse until transparent, t...

Embodiment 3

[0054] Components are as follows (by weight):

[0055] Bentonite slurry: 88 parts of solvent, 2 parts of dispersant, 10 parts of bentonite;

[0056] Titanium dioxide paste: 30 parts of synthetic fatty acid resin, 60 parts of titanium dioxide, 1 part of dispersant, 9 parts of solvent;

[0057] Main ingredients: 30 parts of acrylic resin, 30 parts of titanium white paste, 8 parts of solvent, 5 parts of bentonite paste, 0.3 part of defoamer, 0.3 part of leveling agent, 1 part of adhesion promoter, 1 part of hand feeling aid, 30 parts of filler share.

[0058] Curing agent: 20 parts of TDI trimer, 30 parts of TDI adduct, 50 parts of solvent.

[0059] The preparation method is as follows:

[0060] Bentonite slurry: first add solvent and dispersant to disperse until transparent, then add bentonite while stirring, mix well and then use a grinder to grind to a fineness of less than 50 microns.

[0061] Titanium dioxide slurry: First add synthetic fatty acid resin, solvent, and dis...

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PUM

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Abstract

The invention discloses a polyurethane coating used on surfaces of polypropylene materials. The polyurethane coating comprises a main ingredient and a curing agent; the main ingredient comprises following ingredients, by weight, 30 to 70 parts of acrylic resin, 5 to 8 parts of an anti-settling agent, 5 to 10 parts of a solvent, 0 to 0.3 part of an antifoaming agent, 0 to 0.3 part of a levelling agent, 1 to 3 parts of a hand feeling auxiliary agent, 1 to 3 parts of a adhesive force promoter, and 20 to 30 parts of a filling material; the curing agent comprises following ingredients, by weight, 10 to 30 parts of TDI trimer, 20 to 40 parts of a TDI addition product, and 40 to 60 parts of a solvent. According to the polyurethane coating used on the surfaces of the polypropylene materials, acrylic resin with excellent adhesive force is selected, and is combined with the special adhesive force promoter, so that the polyurethane coating possesses excellent interlayer adhesive force on the surfaces of the polypropylene materials, is high in glossiness, and is quick for drying. No white scratch is left after finger scratching. The polyurethane coating is suitable for large area construction.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a coating used on the surface of a polypropylene material. Background technique [0002] Coating is a material that can be coated on the surface of an object by different construction techniques to form a solid film with firm adhesion, certain strength, and continuity, so that the surface of the object to be coated is isolated from the environmental medium, thereby protecting the surface of the object Painted objects play the role of protection and decoration. Polyurethane coatings are currently the most common type of coatings, generally two-component polyurethane coatings. Two-component polyurethane topcoat paint is generally composed of isocyanate prepolymers (also known as low molecular carbamate ester polymers) and hydroxyl resins, commonly known as curing agent components and main agent components. The advantages of polyurethane coatings are: the coating film is soft and elastic; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C08G18/62
Inventor 刘伟平陈寿生
Owner 展辰新材料集团股份有限公司
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