Preparation method for epoxy-organic silicon resin modified polyurethane-acrylate water-dispersion and water-based epoxy zinc-rich primer paint

A water-based epoxy zinc-rich and epoxy resin technology, which is applied in coatings, anti-corrosion coatings, etc., can solve environmental problems and achieve low VOC, full paint film, and wide application

Inactive Publication Date: 2016-01-06
JIANGSU LONGSHENG POLYMER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more commonly used heavy-duty epoxy coatings are solvent-based, three-component anti-corrosion coatings that use epoxy resin as the base material, curing agent as component B, and zinc powder as component C. It contains a curing agent and is not environmentally friendly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of epoxy-silicone resin modified polyurethane-acrylic acid aqueous dispersion, comprising the following steps: (1) under the protection of dry nitrogen, 3 parts by weight of silane coupling agent KH550 and 6 parts by weight of Add epoxy resin (E-51) into a four-necked flask, mix well and react at room temperature for 3 hours to obtain component A;

[0026] (2) Under the protection of dry nitrogen, 6 parts by weight of polycarbonate polyol (PCD) after vacuum dehydration, component A obtained in step (1) and 4 parts by weight of isophorone diisocyanate (IPDI ) into a four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, heated up to 85-90°C, reacted for 2 hours, and then added 6 parts by weight of diethylene glycol (as a chain extender), 5 parts by weight Cross-linking agent trimethylolpropane (TMP), 3 parts by weight of dimethylolpropionic acid (DMPA), 5 parts by weight of acetone and 0.1 part by weight of catalyst (T-12), ...

Embodiment 2

[0031] A preparation method of an epoxy-silicone resin modified polyurethane-acrylic acid aqueous dispersion, comprising the following steps: (1) under the protection of dry nitrogen, 2 parts by weight of silane coupling agent KH550 and 7 parts by weight of Epoxy resin (E-51) was added into a four-necked flask, mixed evenly, and reacted at room temperature for 3 hours to obtain component A;

[0032](2) Under the protection of dry nitrogen, 5 parts by weight of polycarbonate polyol (PCD) after vacuum dehydration, component A obtained in step (1) and 5 parts by weight of isophorone diisocyanate (IPDI ) into a four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, raised the temperature to 85-90°C, reacted for 2 hours, then added 7 parts by weight of diethylene glycol (as a chain extender), 6 parts by weight The crosslinking agent trimethylolpropane (TMP), 6.5 parts by weight of dimethylol propionic acid (DMPA), 7 parts by weight of acetone and 0.2 parts...

Embodiment 3

[0037] A preparation method of an epoxy-silicone resin modified polyurethane-acrylic acid aqueous dispersion, comprising the following steps: (1) under the protection of dry nitrogen, 4 parts by weight of silane coupling agent KH550 and 8 parts by weight of Epoxy resin (E-51) was added into a four-necked flask, mixed evenly, and reacted at room temperature for 3 hours to obtain component A;

[0038] (2) Under the protection of dry nitrogen, 8 parts by weight of polycarbonate polyol (PCD) after vacuum dehydration, component A obtained in step (1) and 7 parts by weight of isophorone diisocyanate (IPDI ) into a four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, heated to 85-90°C, reacted for 2 hours, and then added 5 parts by weight of diethylene glycol (as a chain extender), 8 parts by weight Cross-linking agent trimethylolpropane (TMP), 7 parts by weight of dimethylolpropionic acid (DMPA), 8 parts by weight of acetone and 0.3 parts by weight of cat...

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Abstract

The invention discloses a preparation method for an epoxy-organic silicon resin modified polyurethane-acrylate water-dispersion. The method comprises the following steps: firstly subjecting a silane coupling agent and epoxy resin to reaction so as to obtain a component A; then adding polycarbonate polyol and isophorone diisocyanate and carrying out reaction, then adding diethylene glycol, trimethylolpropane, dimethylolpropionic acid, acetone and a catalyst, continuing reaction, then dropwise adding methyl methacrylate and hydroxyethyl acrylate, then adding triethylamine and deionized water under stirring, and adding ethylenediamine and carrying out chain extension so as to obtain a prepolymer; and finally, adding the acetone of azodiisobutyronitrile and initiating polymerization reaction of an acrylic monomer so as to obtain the water-dispersion. The water-based epoxy zinc-rich primer paint prepared in the invention has tough paint film, high mechanical strength, good adhesive force to a substrate and excellent anticorrosion performance, facilitates to matching with a finish paint, is free of flash erosion, and has strong market potential.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a method for preparing an epoxy-organic silicon resin-modified polyurethane-acrylic water dispersion and a water-based epoxy zinc-rich primer containing the water dispersion. Background technique [0002] Water-based industrial coatings are prepared from water-based resins, pigments, various additives, and deionized water. They are environmentally friendly and harmless to humans. However, there are still many technical problems in water-based industrial coatings, such as the stability of the emulsion, the water resistance of the coating film, the wet adhesion and the mechanical strength, etc. The key technologies need to be broken through. [0003] The pure water-based polyurethane emulsion cannot meet people's needs in some properties, such as: poor mechanical properties of the film, poor chemical resistance, water resistance, and solvent resistance, and low hardnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08G18/75C08G18/58C08G18/44C08G18/12C08G18/32C08G18/34C08G18/67C09D151/08C09D5/10C09D7/12
Inventor 王晓东宋建华袁东升
Owner JIANGSU LONGSHENG POLYMER MATERIAL TECH CO LTD
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