Light-transmitting aqueous polyurethane coating and preparation method thereof

A water-based polyurethane and coating technology, applied in the field of coatings, can solve the problems of the paint film reducing the transmittance of the substrate, not showing the beauty of the substrate, and affecting the appearance and image, achieving broad application prospects and development potential, and improving storage stability. , the effect of excellent adhesion

Inactive Publication Date: 2020-02-07
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Water-based polyurethane coatings are mainly used as protective and decorative topcoats. They are applied to substrates such as glass and plastics that require a certain degree of light transmission, but there are often some problems. For example, some have good transparency but poor gloss; It meets the requirements but the transparency is poor, which cannot show the beauty of the substrate; the abrasion resistance is poor, and the wear of the paint film reduces the light transmittance of the substrate and affects the appearance image

Method used

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  • Light-transmitting aqueous polyurethane coating and preparation method thereof
  • Light-transmitting aqueous polyurethane coating and preparation method thereof

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Embodiment

[0051] Formulation: as shown in table 1.

[0052] Preparation method: including the preparation of component A and component B, and finally made by mixing component A and component B;

[0053] A component preparation includes the following steps:

[0054] (1) Under the stirring condition of 700r / min, add 60wt% deionized water, defoamer, dispersant, 20wt% cosolvent, pigments and fillers, anti-sedimentation agent into the stock preparation pot in turn, stir for 20min, and grind to obtain Early slurry, grinding fineness ≤ 20um;

[0055] (2) Add water-based polyurethane emulsion, the remaining amount of deionized water, and the remaining amount of co-solvent into the paint mixing tank in sequence, and stir at 500r / min for 10min until uniform;

[0056] (3) After stirring the early stage slurry prepared in step (1) evenly, pour it into the paint mixing tank slowly, adjust the rotating speed to 700r / min and stir evenly;

[0057] (4) Add the substrate wetting agent to the paint mix...

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Abstract

The invention discloses a light-transmitting aqueous polyurethane coating and a preparation method thereof, and belongs to the technical field of coatings. The coating comprises a component A and a component B in parts by weight, wherein the component A comprises 45 to 55 parts of aqueous polyurethane emulsion, 4 to 6 parts of a cosolvent, 0.3 to 0.4 part of a defoaming agent, 2 to 3 parts of a dispersing agent, 30 to 40 parts of a pigment and a filler, 0.5 to 1 part of a base material wetting agent, 5 to 13 parts of deionized water, 1 to 2 parts of a thickening agent and 0.5 to 1 part of an anti-settling agent; the component B comprises 7 to 12 parts of an isocyanate curing agent and 3 to 6 parts of propylene glycol diacetate. According to the coating, the water-based polyurethane emulsion is matched with the isocyanate curing agent, and the coating has the advantages of high wear resistance, high transparency and high stability.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a light-transmitting water-based polyurethane coating and a preparation method thereof. Background technique [0002] Traditional solvent-based two-component polyurethane coatings have excellent properties such as low film-forming temperature, strong adhesion, good wear resistance, and high hardness. They are widely used in industrial protection, wood furniture, and automobiles. However, with the continuous implementation and improvement of environmental protection policies and the continuous enhancement and improvement of consumers' awareness of environmental protection, traditional oil-based paints are gradually being replaced by environmentally-friendly paints. important parts of. Water-based paint is recognized by consumers for its characteristics of low VOC, energy saving, non-toxic, and environmental protection. However, due to the fact that some performances are lower th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/61C09D7/20C09D7/43C08G18/62
CPCC08G18/6216C08K2003/3045C08L2201/08C08L2201/10C09D5/08C09D7/20C09D7/43C09D7/61C09D175/04C08K3/30C08K3/36C08K3/40C08K3/34
Inventor 刘士业周泽钱董立志胡中源
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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