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Environmental-friendly water paint and preparation method thereof

A water-based paint, environmental protection technology, applied in paints containing biocide, anti-fouling/underwater coatings, coatings, etc., can solve the problems that water-based paints have insignificant and ineffective removal of formaldehyde, and achieve the goal of eliminating secondary Effects of pollution, strong formaldehyde removal ability, and reliable living environment

Inactive Publication Date: 2015-02-18
鹤山市信兴化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned disclosed water-based paints can all produce the effect of removing formaldehyde to a certain extent, but, due to the influence of density and the effect of interfacial energy, the effective removal components of formaldehyde added in the above-mentioned water-based paints are all embedded in the inside of the paint film, However, it is difficult to contact with formaldehyde. Only a very small amount of effective substances existing on the surface of the paint film can contact and act on formaldehyde, which leads to the extremely insignificant effect of water-based paint on removing formaldehyde and cannot achieve the desired effect

Method used

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  • Environmental-friendly water paint and preparation method thereof
  • Environmental-friendly water paint and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] The environment-friendly water-based paint of the present embodiment comprises the following materials by weight:

[0037]

[0038]

[0039] The preparation method of the environment-friendly water-based paint of the present embodiment may further comprise the steps:

[0040] (1) Preparation of hyperbranched polyurethane emulsion:

[0041] a. Dissolve 10.5g of histidine in 25ml of deionized water, adjust its pH value to 9-10 with 8mol / L NaOH solution; slowly add acetic anhydride dropwise at 0°C, and add NaOH solution appropriately to control the pH of the system The pH value is in the range of 9 to 10. After the mixture continues to be stirred for 4 hours, it is acidified with concentrated hydrochloric acid to a pH value of 2; the solvent and excess acetic anhydride are removed by distillation under reduced pressure, and the residue is dissolved in 20ml of methanol. After filtration, α Amino-protected histidine;

[0042]b. Add 46.68g of toluene diisocyanate and ...

Embodiment 2

[0049] The environment-friendly water-based paint of the present embodiment comprises the following materials by weight:

[0050]

[0051] The preparation method of the environment-friendly water-based paint of the present embodiment may further comprise the steps:

[0052] (1) Preparation of hyperbranched polyurethane emulsion:

[0053] a. Dissolve 10.5g of histidine in 25ml of deionized water, adjust its pH value to 9-10 with 8mol / L NaOH solution; slowly add acetic anhydride dropwise at 0°C, and add NaOH solution appropriately to control the pH of the system The pH value is in the range of 9 to 10. After the mixture continues to be stirred for 4 hours, it is acidified with concentrated hydrochloric acid to a pH value of 2; the solvent and excess acetic anhydride are removed by distillation under reduced pressure, and the residue is dissolved in 20ml of methanol. After filtration, α Amino-protected histidine;

[0054] b. Add 46.68g of toluene diisocyanate and 4.69g of N,...

Embodiment 3

[0061] The environment-friendly water-based paint of the present embodiment comprises the following materials by weight:

[0062]

[0063] The preparation method of the environment-friendly water-based paint of the present embodiment may further comprise the steps:

[0064] (1) Preparation of hyperbranched polyurethane emulsion:

[0065] a. Dissolve 10.5g of histidine in 25ml of deionized water, adjust its pH value to 9-10 with 8mol / L NaOH solution; slowly add acetic anhydride dropwise at 0°C, and add NaOH solution appropriately to control the pH of the system The pH value is in the range of 9 to 10. After the mixture continues to be stirred for 4 hours, it is acidified with concentrated hydrochloric acid to a pH value of 2; the solvent and excess acetic anhydride are removed by distillation under reduced pressure, and the residue is dissolved in 20ml of methanol. After filtration, α Amino-protected histidine;

[0066] b. Add 46.68g of diphenylmethane diisocyanate and 4.6...

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Abstract

The invention relates to environmental-friendly water paint. The water paint comprises the following substances: 40-50 parts of a hyperbranched polyurethane emulsion, 30-40 parts of an acrylic ester emulsion, 5-15 parts of water, 1-15 parts of nanometer titanium dioxide, 0.1-3 parts of a thickening agent, 2-4 parts of a film forming additive, 0.1-0.6 part of an antifoaming agent, 0.01-0.3 part of a disinfecting preservative, and 0.1-4 parts of a dispersing agent. The invention also relates to a preparation method for the water paint. An active group in the water paint is an alpha amino. The invention begins with a film forming substance of a paint film, firstly, the alpha amino is prepared into histidine of which the alpha amino is protected, then the histidine is introduced into film forming resin, and the tail end of the hyperbranched structure of a resin molecule is just the active group alpha amino, so that the active group alpha amino is furthest exposed, effective active groups in the resin molecule are greatly improved, and the effective active groups are in wide contact with methanal; therefore, methanal is converted into a steady nontoxic chemical compound, and the purpose of effectively removing methanal is achieved.

Description

technical field [0001] The invention relates to the technical field of water-based paint and a preparation method thereof, in particular to an environmentally friendly water-based paint capable of removing formaldehyde and a preparation method thereof. Background technique [0002] In modern decoration, various household and building materials will volatilize toxic and harmful substances such as formaldehyde and benzene series. Such substances not only pollute the indoor environment, but also seriously threaten people's health. In order to meet people's increasing requirements for living environment, various formaldehyde removal products have emerged as the times require. [0003] There are mainly three types of methods for removing formaldehyde on the market: [0004] (1) Physical adsorption. Physical adsorption mainly uses porous substances such as activated carbon to adsorb formaldehyde, but the adsorption capacity is limited, and the validity period is short, and even ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D133/04C09D5/14C09D5/08C08G18/67C08G18/38
CPCC08K2003/2241C09D175/14C08G18/0823C08G18/44C08G18/6659C08G18/6755C08K2201/011C09D5/14C09D7/61C09D7/67C08L33/04
Inventor 魏钢
Owner 鹤山市信兴化工有限公司
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