Weather-resistant solvent-free two-component polyurethane coating as well as preparation method and use method thereof

A two-component polyurethane, solvent-free technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of environmental pollution and high spray thickness of solvent-free coatings, achieve low overall cost, improve construction efficiency, and reduce labor cost effect

Inactive Publication Date: 2021-03-19
榕珍新材料科技发展(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a solvent-free two-component polyurethane topcoat with good weather resistance, which can not only solve the environmental pollution problems of current water-based and oil-based paints, but also achieve the same decorative effect as oil-based paints. and protective performance, and the spraying thickness of solvent-free coatings is high, which not only helps to reduce VOC emissions, but also produces great social benefits, and can also reduce labor costs and improve delivery efficiency

Method used

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  • Weather-resistant solvent-free two-component polyurethane coating as well as preparation method and use method thereof
  • Weather-resistant solvent-free two-component polyurethane coating as well as preparation method and use method thereof
  • Weather-resistant solvent-free two-component polyurethane coating as well as preparation method and use method thereof

Examples

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Embodiment

[0039] In this technology, a mixture of castor oil-based modified polyol resin and soybean oil-based polyol resin is introduced as the base material, and a wetting and dispersing agent is added, and the toner and filler are evenly dispersed in the base material by sand milling to form A The component is composed of HDI isocyanate derivative curing agent with low viscosity and good weather resistance as component B. When using, mix component A and component B evenly, and then use sprayable solvent-free two-component polyurethane coating airless spraying equipment to spray on the substrate.

[0040] Information on castor oil based polyol resins and soybean oil polyester polyols:

[0041] The castor oil-based modified polyester polyol resin is a trifunctional polyester polyol formed by the reaction of castor oil and TMP, and the hydroxyl group in its molecule is a secondary hydroxyl group.

[0042] The most commonly used preparation method of soybean oil polyol is the epoxy ring...

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Abstract

The invention provides provides weather-resistant solvent-free two-component polyurethane coating. Solvent-free soybean oil-based polyol resin with good weather resistance, a low-viscosity HDI derivative curing agent with good weather resistance and powder with good weather resistance are introduced, so that the weather resistance problem of the whole coating product is well solved. A zirconium-based organic catalyst and an organic zinc catalyst are compounded, so that the requirements of spraying the solvent-free two-component polyurethane coating on longer working life and quicker drying property in the later period are well met. The low-viscosity HDI derivative isocyanate curing agent greatly reduces the viscosity of the system and prolongs construction time, so that a sprayed solvent-free coating film is relatively thin, and the leveling property of the film is good.

Description

technical field [0001] The invention relates to a surface decoration protective coating, in particular to a solvent-free two-component polyurethane coating with a long construction period and its preparation and application method. Background technique [0002] Vehicles and other large-scale mechanical equipment, such as rail transit, construction machinery, etc., are currently painted with solvent-based coating systems. With the increasingly stringent environmental protection policies in our country, especially the higher and higher requirements for VOC emissions of coatings, some enterprises have begun to use water-based coating systems to replace solvent-based coating systems, but the comprehensive performance of water-based coating products is far inferior to that of solvent-based coatings. Paint products, in addition, many water-based paint raw materials and their products use more water-soluble additives in the production process. Once these water-soluble additives pen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61
CPCC08K2003/3045C09D175/14C09D7/61C08K3/30
Inventor 孟祥侠
Owner 榕珍新材料科技发展(上海)有限公司
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