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Preparation method of environment-friendly waterborne coating

A water-based paint, environmentally friendly technology, applied in the field of paint, can solve the problems of easy delamination, poor system compatibility, etc., to achieve the effect of enhancing compatibility

Inactive Publication Date: 2018-03-06
CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a preparation method of an environment-friendly water-based paint, by adding the pre-polymerized emulsion of water-based polyurethane into the emulsion of the acrylic system, and then using a cross-linking agent to cross-link the polyurethane and the acrylic polymer to solve the problem of acrylic emulsion and polyurethane emulsion There are problems of poor system compatibility and easy delamination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of environmentally friendly water-based paint includes the following steps:

[0023] S1. The polyether glycol N220 is distilled under reduced pressure at 70°C and 0.5Mpa to remove water. In parts by weight, 10 parts of polyether glycol N220 are heated to 72°C, and then added to the polyether glycol under the protection of nitrogen. Gradually add 19 parts of toluene diisocyanate to the alcohol, add 2.4 parts of dicarboxymethylpropionic acid after 1.5 hours of reaction, continue the reaction for 1 hour, and obtain a prepolymerized emulsion after the reaction is completed;

[0024] S2. In parts by weight, add 5 parts of acrylic acid, 2.1 parts of acrylamide, 0.6 parts of methyl methacrylate, 2 parts of styrene, 0.5 parts of hexyl acrylate, and 10 parts of 0.01% ammonium persulfate by weight In the aqueous solution, then stir and heat to 47°C, then add 3 parts of water at 46°C every 5 minutes, stop adding water after 2 hours, then add to the prepolymerized e...

Embodiment 2

[0027] A preparation method of environmentally friendly water-based paint includes the following steps:

[0028] S1. The polyether glycol N220 is distilled under reduced pressure at 70°C and 0.5Mpa to remove water. In parts by weight, 10 parts of polyether glycol N220 are heated to 72°C, and then added to the polyether glycol under the protection of nitrogen. Gradually add 20 parts of toluene diisocyanate to the alcohol, add 2 parts of dicarboxymethylpropionic acid after the reaction for 1.5 hours, continue the reaction for 1 hour, and obtain a prepolymerized emulsion after the reaction is completed;

[0029] S2. Add 5 parts of acrylic acid, 2.2 parts of acrylamide, 0.5 parts of methyl methacrylate, 2 parts of styrene, 0.3 parts of hexyl acrylate, and 10 parts of 0.01% ammonium persulfate in parts by weight. In the aqueous solution, then stir and heat to 45°C, then add 3 parts of water at 46°C every 5 minutes, stop adding water after 2 hours, then add to the prepolymerized emulsion...

Embodiment 3

[0032] A preparation method of environmentally friendly water-based paint includes the following steps:

[0033] S1. The polyether glycol N220 is distilled under reduced pressure at 70°C and 0.5Mpa to remove water. In parts by weight, 10 parts of polyether glycol N220 are heated to 72°C, and then added to the polyether glycol under the protection of nitrogen. Gradually add 21 parts of toluene diisocyanate to the alcohol, add 2.2 parts of dicarboxymethylpropionic acid after the reaction for 1.5 hours, continue the reaction for 1 hour, and obtain a prepolymerized emulsion after the reaction is completed;

[0034] S2. In parts by weight, add 5 parts of acrylic acid, 2 parts of acrylamide, 0.9 parts of methyl methacrylate, 2 parts of styrene, 0.6 parts of hexyl acrylate, and 10 parts of 0.01% ammonium persulfate by weight In the aqueous solution, then stir and heat to 447°C, then add 3 parts of water at 46°C every 5 minutes, stop adding water after 2 hours, then add to the prepolymeriz...

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PUM

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Abstract

The invention discloses a preparation method of environment-friendly waterborne coating. The preparation method comprises the following steps: preparing polyurethane emulsion by taking polyether glycol N220, toluene diisocyanate and dicarboxymethyl propionic acid as raw materials; then taking 5 parts of acrylic acid, 2 to 2.2 parts of acrylamide, 0.5 to 0.9 part of methyl methacrylate, 2 parts ofstyrene and 0.3 to 0.6 part of ethyl acrylate as monomers; adding the monomers into 10 parts of an ammonium persulfate water solution with the mass percent of 0.01 percent; in a reaction process, gradually adding water; then adding the mixture into the polyurethane emulsion; stirring and emulsifying and taking a mixture of SAC-100 and N,N-methylene-bisacrylamide as a cross-linking agent to continually react, so as to prepare acrylic polyurethane emulsion; uniformly mixing 30 to 45 parts of the acrylic polyurethane emulsion, 3 to 5 parts of nano titanium dioxide, 4 to 5 parts of a curing agent,10 to 12 parts of a pigment, 2 to 3 parts of a dispersant, 15 to 20 parts of filling and 55 to 75 parts of water to obtain the waterborne coating. By adopting the preparation method of the environment-friendly waterborne coating, the problem that the system compatibility between acrylic emulsion and polyurethane emulsion is poor is solved.

Description

Technical field [0001] The invention belongs to the field of coatings, and specifically relates to a preparation method of environmentally friendly water-based coatings. Background technique [0002] With the increasing global awareness of environmental protection, the stricter restrictions on hazardous substances in the chemical coating industry, and the introduction of national standards for indoor and outdoor air quality, some solvent-based coatings with high volatile organic compounds (VOC) content are facing great challenges . Therefore, based on its environmental protection and low VOC emission characteristics, water-based coatings are currently the hotspot and focus of research and development, and have broad application prospects. [0003] Aqueous polyurethane dispersion is a film-forming substance for the preparation of water-based woodware and industrial coatings. The preparation methods usually include external emulsification and self-emulsification. The external emuls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D133/02C09D175/14C09D7/61C09D5/14C08G18/66C08G18/48C08G18/34C08F220/06C08F220/56C08F220/14C08F212/08C08F220/18C08F222/38
CPCC08F220/06C08G18/348C08G18/4825C08G18/6692C08K2003/2241C08K2201/011C08L2312/00C09D5/14C09D175/08C09D175/14C08L33/02C08K3/22C08F220/56C08F220/14C08F212/08C08F220/1806C08F222/385
Inventor 卯志华
Owner CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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