Waterborne wood paint containing modified polyurethane emulsion and preparation method of waterborne wood paint

A technology of polyurethane emulsion and wood coatings, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve the problems of low solid content, low solid content, and poor stability of water-based polyurethane

Active Publication Date: 2017-09-22
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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  • Waterborne wood paint containing modified polyurethane emulsion and preparation method of waterborne wood paint
  • Waterborne wood paint containing modified polyurethane emulsion and preparation method of waterborne wood paint
  • Waterborne wood paint containing modified polyurethane emulsion and preparation method of waterborne wood paint

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 waterborne wood paint containing modified polyurethane emulsion and a preparation method of the waterborne wood paint. The waterborne wood paint containing the modified polyurethane emulsion is prepared from the following components: water, a thickener, a de-foaming agent, a pH (Potential of Hydrogen) regulator, an anti-freezing agent, a film-forming auxiliary agent, the modified polyurethane emulsion, a flatting agent, a nano inorganic antibacterial formaldehyde removing agent and waterborne paint inorganic hardening resin, wherein the selected modified polyurethane emulsion is prepared from self-cross-linked polyurethane acrylate composite emulsion, polyurethane acrylate copolymerized emulsion with a core-shell interpenetrating network structure, silane coupling agent modified polyurethane acrylate composite emulsion and epoxy resin modified polyurethane emulsion. The emulsions are added into the waterborne wood paint, so that the waterborne wood paint has very high rigidity and adhesive force and good water resistance, alcohol resistance and pollution resistance; the nano inorganic antibacterial formaldehyde removing agent is selected, so that the waterborne wood paint has environment-friendly, safe and toxin-free, and long-period antibacterial effects. The waterborne paint inorganic hardening resin is used for improving the rigidity, adhesive force and chemical resistance properties of the waterborne 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): C09D151/08C09D175/06C09D5/16C09D5/02C09D5/14C08F283/00C08G18/75C08G18/66C08G18/42C08G18/32C08G18/12C08G18/67C08G18/83C08G18/58
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 王艳其他发明人请求不公开姓名
Owner SKSHU PAINT
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