Double-component water-based polyurethane coating for woodware

A water-based polyurethane, two-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance and achieve excellent alcohol resistance, high hardness, and good transparency

Inactive Publication Date: 2019-04-12
ANHUI KAILIN ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, two-component waterborne polyurethane coatings are very sensitive to water and have poor water resistance, which needs to be solved urgently

Method used

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  • Double-component water-based polyurethane coating for woodware

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A two-component water-based polyurethane coating for wood, comprising: component a and component b, the weight ratio of component a and component b is 7:3;

[0018] The raw materials of component a include: 100kg of water-based polyurethane dispersion, 120kg of water-based alkyd resin, 30kg of low hydroxyl value acrylic emulsion, 10kg of degraded polyethylene glycol microspheres, 1kg of white carbon black, 1kg of zinc phosphate, 2kg of epoxy soybean oil, Disproportionated rosin 4kg, wetting agent 1kg, defoamer 2kg, leveling agent 1kg, thickener 2kg, deionized water 50kg.

[0019] The degraded polyethylene glycol microspheres are prepared by the following process: 80kg of polyethylene glycol 6000 is irradiated and degraded, the irradiation dose is 0.43MGy, exhausted and degassed, crushed to a particle size of 23-46μm, and 12kg of oxidized polyethylene wax is added Stir for 4 minutes at a stirring speed of 900r / min, then add 4kg of aluminum nitrate, 8kg of boric acid, and...

Embodiment 2

[0022] A two-component water-based polyurethane coating for wood, comprising: component a and component b, the weight ratio of component a and component b is 9:1;

[0023] The raw materials of component a include: water-based polyurethane dispersion 140kg, water-based alkyd resin 80kg, low hydroxyl value acrylic emulsion 60kg, degraded polyethylene glycol microspheres 4kg, white carbon black 3kg, zinc phosphate 0.2kg, epoxy soybean oil 8kg , Disproportionated rosin 1kg, wetting agent 2kg, defoamer 1kg, leveling agent 2kg, thickener 1kg, deionized water 100kg.

[0024] The degraded polyethylene glycol microspheres are prepared by the following process: 40kg of polyethylene glycol 6000 is irradiated and degraded, the irradiation dose is 0.47MGy, exhausted and degassed, crushed to a particle size of 23-46μm, and 2kg of oxidized polyethylene wax is added Stir for 8 minutes at a stirring speed of 500r / min, then add 10kg of aluminum nitrate, 3kg of boric acid, and 200kg of water and...

Embodiment 3

[0027] A two-component water-based polyurethane coating for wood, comprising: component a and component b, the weight ratio of component a and component b is 7.5:2.5;

[0028] The raw materials of component a include: water-based polyurethane dispersion 110kg, water-based alkyd resin 110kg, low hydroxyl value acrylic emulsion 40kg, degraded polyethylene glycol microspheres 8kg, white carbon black 1.5kg, zinc phosphate 0.8kg, epoxy soybean oil 4kg, disproportionated rosin 3kg, wetting agent 1.3kg, defoamer 1.7kg, leveling agent 1.4kg, thickener 1.6kg, deionized water 60kg.

[0029] The degraded polyethylene glycol microspheres are prepared by the following process: 70kg of polyethylene glycol 6000 is irradiated and degraded, the irradiation dose is 0.44MGy, exhausted and degassed, crushed to a particle size of 23-46μm, and 10kg of oxidized polyethylene wax is added Stir for 5 minutes at a stirring speed of 800r / min, then add 6kg of aluminum nitrate, 6kg of boric acid, and 160kg...

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Abstract

The invention discloses a double-component water-based polyurethane coating for woodware. The coating comprises a component a and a component b, and the weight ratio of the component a to the component b is (7-9):(1-3); raw materials of the component a comprise a waterborne polyurethane dispersion, water-based alkyd resin, a low-hydroxyl-value acrylic emulsion, degraded polyethylene glycol microspheres, white carbon black, zinc phosphate, epoxidized soybean oil, disproportionated rosin, a wetting agent, a defoaming agent, a flatting agent, a thickening agent and deionized water; and raw materials of the component b comprise water-based isocyanate and water. The degraded polyethylene glycol microspheres are prepared by the following process: degrading polyethylene glycol 6000 by irradiation, carrying out exhausting and degassing, carrying out crushing, adding oxidized polyethlene wax, carrying out stirring, then adding aluminum nitrate, boric acid and water, uniformly carrying out stirring, dropwise adding ammonia water under a stirring state until the pH value of the system is 8.1-8.5, carrying out stirring to obtain a white emulsion suspension, carrying out a hydrothermal reaction, and carrying out cooling to obtain the degradable polyethylene glycol microspheres.

Description

technical field [0001] The invention relates to the technical field of wood coatings, in particular to a two-component waterborne polyurethane coating for wood. Background technique [0002] Two-component polyurethane coatings are generally composed of a paint component containing hydroxyl or amine functional groups and a curing agent component containing isocyanate functional groups. Two-component polyurethane coatings can generally be divided into solvent-based polyurethane coatings and water-based polyurethane coatings. Waterborne polyurethane coatings, especially two-component waterborne polyurethane coatings, not only retain the excellent performance of solvent-based polyurethane coatings, but also have good environmental friendliness, so they have broad application prospects. [0003] However, two-component waterborne polyurethane coatings are very sensitive to water and have poor water resistance, which needs to be solved urgently. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D175/04C09D7/61C09D7/65
CPCC08K2003/328C08L2205/02C08L2205/035C09D7/61C09D7/65C09D7/70C09D175/14C08L75/04C08L91/00C08L93/04C08L23/30C08K3/36C08K3/32C08K3/28
Inventor 王厚国李子荣王和山王和东殷东楼殷芳荣曹文强张万霞张萍
Owner ANHUI KAILIN ADVANCED MATERIAL CO LTD
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