Two-component polyurethane finish paint and preparation method thereof

A two-component polyurethane and polyurethane dispersion technology, applied in the field of coatings, can solve the problems of unsatisfactory paint film performance and slow crosslinking speed, and achieve the effects of low cost, improved water resistance, and improved stability

Inactive Publication Date: 2019-12-24
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of slow crosslinking speed and unsatisfactory paint film performance in the water-based two-component polyurethane topcoat using polycarbodiimide as the curing agent in the prior art, the present invention provides a two-component polyurethane topcoat and its preparation method

Method used

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  • Two-component polyurethane finish paint and preparation method thereof

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Embodiment 1

[0039] The embodiment of the present invention provides a two-component polyurethane topcoat, including A component and B component, and the A component includes the following raw material components in mass percentage: 35% of water-based hydroxyl acrylic dispersion, water-based self-crosslinking polyurethane Dispersion 20%, casein emulsion 5%, wetting and dispersing agent 0.5%, defoamer 0.1%, pigment 23%, leveling agent 0.7%, substrate wetting agent 0.2%, thickener 0.5% and deionization water 15%;

[0040] The B component includes the following raw material components in mass percentage: water-based polycarbodiimide curing agent;

[0041] The mass ratio of the A component and the B component is 10:1.

[0042] Wherein, the aqueous hydroxyl acrylic dispersion is a mixture of Setaqua 6522 and Bayhydrol2469 in a mass ratio of 0.8:1; the self-crosslinking polyurethane dispersion is Bayhydrol XP 2593 and Bayhydrol XP in a mass ratio of 1:1 2558; the casein emulsion is PB-403 of H...

Embodiment 2

[0048] The embodiment of the present invention provides a two-component polyurethane topcoat, including A component and B component, and the A component includes the following raw material components in mass percentage: 45% of low water-based hydroxyl acrylic dispersion, water-based self-crosslinking Polyurethane dispersion 15%, casein emulsion 9.1%, wetting and dispersing agent 1.5%, defoamer 0.1%, pigment 15%, leveling agent 1%, substrate wetting agent 0.1%, thickener 0.2% and Ionized water 13%;

[0049] The B component includes the following raw material components in mass percentage: water-based polycarbodiimide curing agent;

[0050] The mass ratio of the A component and the B component is 15:1.

[0051] The trade mark of above-mentioned each component is identical with embodiment 1, and difference is: described aqueous hydroxyl acrylic dispersion is the mixture of Setaqua 6522 and Bayhydrol 2469 that mass ratio is 1.2:1; Described self-crosslinking polyurethane dispersi...

Embodiment 3

[0054] The embodiment of the present invention provides a two-component polyurethane topcoat, including A component and B component, and the A component includes the following raw material components in mass percentages: 50% water-based hydroxyl acrylic dispersion, water-based self-crosslinking polyurethane Dispersion 5%, casein emulsion 15%, wetting and dispersing agent 1%, defoamer 0.5%, pigment 17.6%, leveling agent 0.5%, substrate wetting agent 0.3%, thickener 0.1% and deionization water 10%;

[0055] The B component includes the following raw material components in mass percentage: water-based polycarbodiimide curing agent;

[0056] The mass ratio of the A component to the B component is 20:1.

[0057] The trade mark of above-mentioned each component is identical with embodiment 1, and difference is: described aqueous hydroxyl acrylic dispersion is the mixture of Setaqua 6522 and Bayhydrol 2469 that mass ratio is 1:1; Described self-crosslinking polyurethane dispersion i...

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Abstract

The invention discloses a two-component polyurethane finish paint and a preparation method thereof. The two-component polyurethane finish paint comprises a component A and a component B, wherein the component A comprises: 35-50% of a water-based hydroxy acrylic acid dispersion, 5-20% of a water-based self-crosslinking polyurethane dispersion, 5-15% of casein emulsion, 0.5-1.5% of a wetting dispersant, 0.1-0.5% of an antifoaming agent, 5-23% of a pigment, 0.5-1% of a leveling agent, 0.1-0.3% of a base material wetting agent, 0.1-0.5% of a thickening agent and 10-15% of deionized water. The component B is prepared from a waterborne polycarbodiimide curing agent, and the mass ratio of the component A to the component B is (10-20):1. The two-component polyurethane finish paint provided by theinvention has the advantages of high drying speed, high paint film hardness, good water resistance and wear resistance, extremely low VOC content, long construction validity period of the paint, convenience in storage and wide market prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a two-component polyurethane topcoat and a preparation method thereof. Background technique [0002] Water-based paint is an environmentally friendly paint, which represents one of the development trends of the paint industry, and its application range is getting wider and wider. There are deficiencies in wiping etc. The application of cross-linking technology in water-based coatings can greatly improve the overall performance of the coating film, and gradually reduce the gap between water-based coatings and solvent-based coatings. [0003] Water-based two-component polyurethane topcoat is a product that has been widely used in recent years. Generally, isocyanate is used as a curing agent. It can be combined with hydroxyacrylic acid dispersion to make a two-component polyurethane coating. Widely used in industrial surface decoration and wood surface. However, due to the react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D189/00
CPCC09D175/04C08L75/04C08L89/005
Inventor 王瑞宏郭晓峰周泽钱徐小东
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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