Environment-friendly coating, preparation method and application

An environmentally friendly and coating technology, applied in paper coating, coating, fiber raw material treatment, etc., can solve the problems of human health hazards, fire hazards, environmental pollution, etc., to extend the service life, improve viscosity, and enhance interaction Effect

Inactive Publication Date: 2022-03-01
詹美
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Traditional coatings are mostly low-solid solvent-based, containing a large amount of organic solvents, which need to be diluted with many organic solvents when used. These solvents evaporate into the atmosphere during construction and drying of the paint film, which is not only harmful to human health, but also pollutes the environment. , and its flammable, fire hazard

Method used

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  • Environment-friendly coating, preparation method and application
  • Environment-friendly coating, preparation method and application
  • Environment-friendly coating, preparation method and application

Examples

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preparation example Construction

[0026] The present invention also proposes a preparation method of an environment-friendly coating, which mainly includes the following steps:

[0027] Mix potato starch with water and gelatinize at 70°C-80°C to obtain starch paste; mix dissolved polyurethane, chitosan and starch paste, then add acrylic acid and trigger in an oxygen-free environment The coating is prepared after reacting for 20h-36h under the condition of 85°C-95°C.

[0028] Specifically, potato starch is mixed with water and gelatinized under the condition of 70°C-80°C to prepare starch paste. At this time, it can help the potato starch to form a gel material with good leveling and viscosity, so as to facilitate the subsequent modification and preparation, thereby improving the mechanical strength and toughness of the coating product.

[0029] In this application, potato starch, water, and polyethylene glycol can be mixed to improve the dispersion effect of potato starch in water, avoid agglomeration, aggreg...

Embodiment 1

[0050] The purpose of this embodiment is to provide a kind of environment-friendly coating, comprise following raw material:

[0051] Potato starch 90g, polyurethane 60g, acrylic acid 30g and chitosan 20g.

[0052] The steps of the preparation method of the nanomaterial are as follows:

[0053] Potato starch and water were mixed in a mass ratio of 1:2, and gelatinized at 75°C to obtain a starch paste with a water content of 45%;

[0054] Polyurethane was dissolved in 1L of 5wt% formic acid solution to prepare polyurethane solution, and then chitosan was dissolved in 500mL of 3wt% acetic acid solution to prepare chitosan solution. And the polyurethane solution and the chitosan solution were stirred and mixed, and the stirring speed was 140rpm to obtain a mixed solution;

[0055] Mix the mixed liquid with the starch paste, and homogenize it under the condition of 0.25MPa to obtain an emulsion; then add acrylic acid and ammonium persulfate to the emulsion in turn, stir when add...

Embodiment 2

[0057] The purpose of this embodiment is to provide a kind of environment-friendly coating, comprise following raw material:

[0058] Potato starch 80g, polyurethane 50g, acrylic acid 20g, chitosan 10g and aloe vera 20g.

[0059] The steps of the preparation method of the nanomaterial are as follows:

[0060] Potato starch is mixed with water in a mass ratio of 1:1.5, and gelatinized at 70°C to obtain a starch paste with a water content of 40%;

[0061] Polyurethane was dissolved in 1L of 5wt% formic acid solution to prepare polyurethane solution, and then chitosan was dissolved in 500mL of 3wt% acetic acid solution to prepare chitosan solution. And stirring and mixing the polyurethane solution and the chitosan solution, the stirring speed is 120rpm, and the mixed solution is obtained;

[0062] Mix the mixed solution, aloe vera extract and starch paste, and homogenize under the condition of 0.2MPa to obtain an emulsion; then add acrylic acid and ammonium persulfate to the em...

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Abstract

The invention provides an environment-friendly coating as well as a preparation method and application thereof, and relates to the technical field of coatings. The coating comprises the following raw materials in parts by weight: 8-10 parts of potato starch, 5-7 parts of polyurethane, 2-4 parts of acrylic acid and 1-3 parts of chitosan. The polyurethane is used as a framework, so that the coating has better chemical resistance, aging resistance and toughness; potato starch is used as a composite raw material to improve the viscosity of the coating; chitosan is used for chain extension, so that the toughness of the coating is further improved, and meanwhile, the antibacterial and mildew-proof properties of the coating are enhanced; and acrylic acid is used as a linking substance to enhance the interaction among the raw materials. According to the preparation method of the coating, toxic and harmful substances are not generated in the preparation process, and the environment friendliness is high. When the coating is applied to corrugated packaging paper, the waterproof and antifouling performance can be improved, and the coating is ecological, environmentally friendly and convenient to recycle.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an environment-friendly coating, a preparation method and an application. Background technique [0002] Traditional coatings are mostly low-solid solvent-based, containing a large amount of organic solvents, which need to be diluted with many organic solvents when used. These solvents evaporate into the atmosphere during construction and drying of the paint film, which is not only harmful to human health, but also pollutes the environment. , and it is flammable and poses a fire hazard. According to statistics released by the National Bureau of Statistics, the total output of China's coatings in 2014 reached 16.48188 million tons, an increase of 7.87% year-on-year after adjustment. Compared with the 13,033,490 tons of total paint output in 2013, a new increase of 3,448,390 tons was added in 2014. Another record high. Based on the production in 2013, if low-solid oil-based pain...

Claims

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Application Information

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IPC IPC(8): D21H19/14D21H19/24D21H19/16D21H21/16D21H21/14
CPCD21H19/14D21H19/24D21H19/16D21H21/16D21H21/14
Inventor 詹美
Owner 詹美
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