Polyurethane transparent top-coat for coating assembly line in three-dimensional effect and preparation method thereof

A technology of three-dimensional effect and transparent topcoat, applied in the field of coatings, can solve the problems of restricting nitrocellulose and failing to meet the requirements of three-dimensional effect coating on the pipeline

Active Publication Date: 2013-11-06
东莞大宝化工制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, nitrocellulose (NC) paint is commonly used in assembly line coating. Because of its fast drying and good transparency, the three-dimensional effect of the painted product is excellent, and it is especially suitable for assembly line operations. However, due to environmental protection factors, The country has begun to gradually restrict the use of nitrocellulose (NC) paint
At present, the common polyurethane (PU) coatings on the market cannot meet the requirements of the three-dimensional effect coating of the assembly line.

Method used

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  • Polyurethane transparent top-coat for coating assembly line in three-dimensional effect and preparation method thereof
  • Polyurethane transparent top-coat for coating assembly line in three-dimensional effect and preparation method thereof
  • Polyurethane transparent top-coat for coating assembly line in three-dimensional effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A polyurethane transparent topcoat for three-dimensional effect painting on an assembly line; comprising a component A, a component B and a thinner, and the weight ratio of the component A and the component B is 4:1,

[0040] Wherein, the solid content of the first component is 42%, and includes 50% of modified quick-drying castor oil alkyd resin, 40% of nitrocellulose solution (30%), 1% of dispersant, 3% of matting powder, hand feel Wax 0.5%, defoamer 1%, leveling agent 1 0.1%, leveling agent 2 0.1%, anti-settling agent 2%, butyl acetate 2.3%;

[0041] The solid content of the B component is 40%, and includes 20% of TDI trimer, 45% of TDI adduct, 15% of HDI trimer, and 20% of butyl acetate;

[0042] The diluent includes the following raw materials calculated by weight percentage:

[0043] Butyl acetate (BAC) 85%, propylene glycol methyl ether acetate 15%.

[0044] The preparation method of the described polyurethane transparent topcoat comprises the following prepara...

Embodiment 2

[0054] A polyurethane transparent topcoat for three-dimensional effect painting on an assembly line; comprising a component A, a component B and a thinner, and the weight ratio of the component A and the component B is 4:1,

[0055] Wherein, the solid content of the first component is 44%, and includes modified quick-drying castor oil alkyd resin 80%, nitrocellulose solution (30%) 18.6%, dispersant 0.5%, hand wax 0.3%, Foaming agent 0.5%, leveling agent 1 0.05%, leveling agent 2 0.05%, anti-settling agent 1%.

[0056] The solid content of the B component is 41%, and includes 30% of TDI trimer, 35% of TDI adduct, and 35% of butyl acetate;

[0057] The diluent includes the following raw materials calculated by weight percentage:

[0058] Butyl acetate (BAC) 95%, propylene glycol methyl ether acetate 5%.

[0059] The preparation method of the described polyurethane transparent topcoat comprises the following preparation steps:

[0060] (1) Preparation of component A:

[0061]...

Embodiment 3

[0069] A polyurethane transparent topcoat for three-dimensional effect painting on an assembly line; comprising a component A, a component B and a thinner, and the weight ratio of the component A and the component B is 4:1,

[0070] Wherein, the solid content of the first component is 46%, and includes 65% of modified quick-drying castor oil alkyd resin, 25% of nitrocellulose solution (30%), 0.9% of dispersant, 1% of matting powder, hand feel Wax 0.4%, defoamer 0.6%, leveling agent 1 0.05%, leveling agent 2 0.05%, anti-settling agent 2%, butyl acetate 5%.

[0071] The solid content of the B component is 43%, and includes 30% of TDI trimer, 45% of TDI adduct, 15% of HDI trimer, and 10% of butyl acetate;

[0072] The diluent includes the following raw materials calculated by weight percentage:

[0073] Butyl acetate (BAC) 90%, propylene glycol methyl ether acetate 10%.

[0074] The preparation method of the described polyurethane transparent topcoat comprises the following pre...

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Abstract

The invention relates to the technical field of coatings and in particular relates to a polyurethane transparent top-coat for coating an assembly line in a three-dimensional effect and a preparation method thereof. The polyurethane transparent top-coat comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 4:1, the solid content of the component A is 42-48%, the component A comprises modified quick-drying castor oil alkyd resin, a nitrocellulose solution, a dispersing agent, extinction powder, handfeel wax, a defoaming agent, a flatting agent I, a flatting agent II and an anti-settling agent; and the solid content of the component B is 40-45%, and the component B comprises a TDI (toluene diisocynate) tripolymer, a TDI addition product, an HDI (hexamethylene diisocyanate) tripolymer and butyl acetate. The component A and the component B are respectively mixed, dispersed at a high speed, inspected, filtered and packaged to prepare the polyurethane transparent top-coat. The polyurethane transparent top-coat can achieve the coating effect and drying speed of an NC (nitrocellulose) coating, and has the advantages of short polishing time, environment friendliness and excellent physical and chemical properties of common polyurethane coats, and wide application range.

Description

Technical field: [0001] The invention relates to the technical field of coatings, in particular to a polyurethane transparent topcoat for pipeline three-dimensional effect coating and a preparation method thereof. Background technique: [0002] At present, nitrocellulose (NC) coating is commonly used in assembly line coating. Because of its fast drying and good transparency, the three-dimensional effect of the coated product is excellent, which is especially suitable for assembly line operation. However, due to environmental protection factors, Countries have begun to gradually restrict the use of nitrocellulose (NC) coatings. However, the ordinary polyurethane (PU) coatings on the market cannot meet the requirements of the three-dimensional effect coating of the assembly line. Invention content: [0003] One of the objectives of the present invention is to aim at the deficiencies of the prior art, and to provide a coating effect and drying speed that can achieve the NC c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D101/18C09D5/28C09D7/12
Inventor 陈贺生
Owner 东莞大宝化工制品有限公司
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