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Water-borne woodware coating containing modified polyurethane emulsion and preparation method thereof

A polyurethane emulsion and wood coating technology, which is applied in polyurea/polyurethane coatings, coatings, paints containing biocide, etc., can solve problems such as poor stability, low solid content of water-based polyurethane, and poor water resistance

Active Publication Date: 2016-03-02
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane emulsion has excellent low-temperature performance, wear resistance, and chemical corrosion resistance. Compared with solvent-based polyurethane, there are still many shortcomings in performance, such as low solid content, poor water resistance, poor stability, etc.
[0003] In order to effectively promote the rapid development of the polyurethane industry and promote the high performance and environmental protection of polyurethane resins, technical problems such as low solid content, poor water resistance, poor solvent resistance, and poor stability of water-based polyurethane must be solved.

Method used

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  • Water-borne woodware coating containing modified polyurethane emulsion and preparation method thereof
  • Water-borne woodware coating containing modified polyurethane emulsion and preparation method thereof
  • Water-borne woodware coating containing modified polyurethane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A self-crosslinking polyurethane-acrylic ester composite emulsion is characterized in that: it is formulated by the following components by weight and number:

[0074]

[0075]

[0076] A kind of preparation of self-crosslinking polyurethane-acrylic acid ester composite emulsion, it is prepared according to the following steps carried out in order by the raw material of following weight ratio:

[0077] 1) Preparation of polyurethane prepolymer:

[0078] Add 24.00 parts of polyester polyol and 25.36 parts of isophorone diisocyanate into a 500mL four-necked flask equipped with a stirrer, thermometer, and condenser tube, heat to 80°C at a stirring speed of 300rpm and under nitrogen protection, and react to the The measured -NCO content reached the theoretical value (16.94%), then 0.88 parts of diacetone acrylamide (DAAM) was dissolved in 12.2 parts of methyl methacrylate, 29.8 parts of butyl methacrylate, after fully dissolving , added to the reaction system to adju...

Embodiment 2

[0084] A self-crosslinking polyurethane-acrylic ester composite emulsion is characterized in that: it is formulated by the following components by weight and number:

[0085]

[0086]

[0087] A kind of preparation of silane coupling agent modified polyurethane-acrylic ester composite emulsion, it is prepared according to the following steps carried out in order by the raw material of following weight ratio:

[0088] 1) Preparation of polyurethane prepolymer:

[0089] Add 26 parts of polyester polyol and 30.18 parts of isophorone diisocyanate into a 500mL four-necked flask equipped with a stirrer, a thermometer and a condenser tube, stir at 500rpm, heat to 85°C under nitrogen protection, and react to The measured -NCO content reaches the theoretical value (18.76%), then 2.20 parts of diacetone acrylamide (DAAM) is dissolved in 14.2 parts of methyl methacrylate, 31.8 parts of butyl methacrylate, fully dissolved After that, add it to the reaction system to adjust the visc...

Embodiment 3

[0095] A self-crosslinking polyurethane-acrylic ester composite emulsion is characterized in that: it is formulated by the following components by weight and number:

[0096]

[0097] A kind of preparation of silane coupling agent modified polyurethane-acrylic ester composite emulsion, it is prepared according to the following steps carried out in order by the raw material of following weight ratio:

[0098] 1) Preparation of polyurethane prepolymer:

[0099] Add 25 parts of polyester polyol and 30.18 parts of isophorone diisocyanate into a 500mL four-necked flask equipped with a stirrer, thermometer, and condenser tube, stir at 500rpm, heat to 85°C under nitrogen protection, and react to The measured -NCO content reached the theoretical value (18.76%), then 2.2 parts of diacetone acrylamide (DAAM) was dissolved in 17.5 parts of methyl methacrylate, 26.5 parts of butyl methacrylate, fully dissolved After that, it is added to the reaction system to adjust the viscosity of t...

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Abstract

The invention provides a water-borne woodware coating containing a modified polyurethane emulsion and a preparation method thereof. The water-borne woodware coating is composed of the following components: water, a thickening agent, a defoaming agent, a pH regulator, an antifreezing agent, a film-forming auxiliary agent, the modified polyurethane emulsion, a levelling agent, a nano inorganic antibacterial aldehyde removing agent, and water-borne paint inorganic hardening resin. The selected modified polyurethane emulsion includes a self-crosslinkable polyurethane acrylate composite emulsion, a core-shell interpenetrated network-structure polyurethane acrylate copolymer emulsion, a silane coupling agent modified polyurethane acrylate composite emulsion, and an epoxy resin modified polyurethane emulsion. The plurality of emulsions are added to the water-borne woodware paint, and thus the coating has the properties of high hardness and adhesion force, and good water resistance, alcohol resistance and pollution resistance; the selected nano inorganic antibacterial aldehyde removing agent has the effects of environmental protection, safety, no toxicity, and long-term bacterial resistance; and the selected water-borne inorganic hardening resin is used for improving the hardness, the adhesion force and the chemical resistance of the water-borne paint.

Description

technical field [0001] The invention relates to a water-based wood coating containing modified polyurethane emulsion and a preparation method thereof, belonging to the technical field of chemical coatings. Background technique [0002] Polyurethane has the advantages of low film forming temperature, good wear resistance, excellent chemical corrosion resistance, flexibility and strong adhesion, and is known as the resin with the best performance. In recent years, with the increasing awareness of environmental protection in various countries around the world, some environmental protection laws and regulations have been formulated to limit the emission of volatile organic compounds (VOC) to the atmosphere. High performance and environmental protection have become the development direction of coatings. Almost all technicians in the paint industry are concerned about the content of solvents, and the research and development of solvent-free paints. Water-based paint, as a paint t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D7/12C08G18/42C08G18/75C08G18/66C08G18/67
CPCC09D151/08C09D175/06C08F283/006C08F283/008C08G18/0823C08G18/12C08G18/3206C08G18/348C08G18/4045C08G18/42C08G18/58C08G18/6644C08G18/6692C08G18/672C08G18/755C08G18/837C09D5/022C09D5/024C09D5/14C09D5/1687C08K2201/011C08K2003/2296C08L2205/02C08L2205/025C08L2205/035C08L75/04C08L83/04C08K13/02C08K3/22C08K3/36C08G18/3228C08G18/3834C08F220/1804C08F220/18
Inventor 洪杰王艳
Owner SKSHU PAINT
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