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Water-based environment-friendly coating capable of removing formaldehyde and preparation method thereof

An environmentally friendly paint and aldehyde water-based technology, applied in the field of paint, can solve the problems of low aldehyde removal efficiency and short aging period, and achieve the effects of simple preparation process, low cost and good mechanical properties

Active Publication Date: 2020-07-31
浙江材华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the purpose of the present invention is to provide a formaldehyde-removing water-based environmental protection coating and its preparation method to solve the problems of low efficiency of formaldehyde removal and short aging time.

Method used

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  • Water-based environment-friendly coating capable of removing formaldehyde and preparation method thereof
  • Water-based environment-friendly coating capable of removing formaldehyde and preparation method thereof
  • Water-based environment-friendly coating capable of removing formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The number average molecular weight M n PCDL 40g for 2000, M n 10g of 2000 PPG, 6g of epoxy resin E44 was dehydrated at 110°C for 30min and then cooled to 50°C, 42g of IPDI was added to a 500ml three-necked flask, and 22g of TDI was added, stirred and heated to 75°C for 2 hours, Add 10g DMPA, 0.02g DBTDL, 8.0g NPG, 3.0g TMP, 7.5g imidazole derivatives and 20g acetone, stir and react at 70°C for 4 hours, then cool down to 40°C, add triethylamine and stir to adjust the pH to about 8.0. Under high-speed shearing and stirring, add 260g of water with a reference mass, and after stirring for 20 minutes, remove the solvent at 40-50°C and 0.01MPa vacuum to obtain aldehyde-removing water-based polyurethane emulsion 1#.

Embodiment 2

[0040] The number average molecular weight M n PCDL 40g for 2000, M n10g of 2000 PPG, 6g of epoxy resin E44 was dehydrated at 110°C for 30 minutes and then cooled to 50°C, 42g of IPDI was added to a 500ml three-necked flask, and 22g of TDI was added, stirred and heated to 75°C for 2 hours. Add 10g DMPA, 0.02g DBTDL, 5.5g NPG, 3.0gTMP, 15g imidazole derivatives and 20g acetone, stir at 70°C for 4 hours and cool down to 40°C, add triethylamine and stir to adjust the pH to about 8.0. Add 260g of water with a reference mass under stirring, and remove the solvent at 40-50°C and 0.01MPa vacuum after stirring for 20 minutes to obtain aldehyde-removing water-based polyurethane emulsion 2#.

Embodiment 3

[0042] The number average molecular weight M n PCDL 40g for 2000, M n 10g of 2000 PPG, 6g of epoxy resin E44 was dehydrated at 110°C for 30 minutes and then cooled to 50°C, 42g of IPDI was added to a 500ml three-necked flask, and 22g of TDI was added, stirred and heated to 75°C for 2 hours. Add 10g DMPA, 0.02g DBTDL, 3.0g NPG, 3.0g TMP, 22.5g imidazole derivatives and 20g acetone, stir and react at 70°C for 4 hours, then cool down to 40°C, add triethylamine and stir to adjust the pH to about 8.0. Under high-speed shearing and stirring, add 260g of water with a reference mass, and after stirring for 20 minutes, remove the solvent at 40-50°C and 0.01MPa vacuum to obtain aldehyde-removing water-based polyurethane emulsion 3#.

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Abstract

The invention belongs to the field of coatings, and relates to a water-based environment-friendly coating capable of removing formaldehyde. For each 100 parts of coating, the coating comprises 10 to 50 parts of a formaldehyde-removing water-based polyurethane emulsion; 10-30 parts of water-based acrylic resin, 5-8 parts of titanium dioxide, 3-5 parts of talcum powder, 0.1-0.5 part of a dispersingagent, 2-5 parts of a coalescing agent, 0.1-1 part of a rheological agent, 0.1-0.3 part of a defoaming agent, 0.1-1 part of a thickening agent, 0.1-0.5 part of a preservative, 0.5-2 parts of a silanecoupling agent and the balance being deionized water. The water-based coating has the beneficial effects that the main component of the formaldehyde-removing water-based coating is the formaldehyde-removing water-based polyurethane emulsion, and active groups capable of reacting with formaldehyde are introduced into the water-based polyurethane resin through chemical reactions. Meanwhile, due to the addition of a neutralizer, the polymer emulsion is weakly alkaline, so that active groups of imidazole derivatives can efficiently react with formaldehyde, and the generation of formaldehyde can beinhibited in the whole reaction process.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a formaldehyde-removing water-based environmental protection coating and a preparation method thereof. Background technique [0002] At present, with the rapid development of the economy, people's pursuit of quality of life is getting higher and higher, and home decoration is getting more and more attention. However, in home decoration, volatile organic chemicals brought by various decoration materials cause home decoration pollution and indoor harmful substances exceed the standard, causing certain interference to the human body. Formaldehyde is one of the most toxic and difficult to remove among these volatile organic chemicals. The human body is exposed to this kind of air containing formaldehyde for a long time, which can cause various diseases, and even endanger the life safety of the human body in serious cases. Formaldehyde has been listed as a mandatory testing item ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D133/04C09D175/14C09D7/63C08G18/12C08G18/66C08G18/75C08G18/76C08G18/44C08G18/48C08G18/58C08G18/32C08G18/34C08G18/36
CPCC09D175/04C09D133/04C09D175/14C09D7/63C08G18/12C08G18/724C08G18/755C08G18/7621C08G18/4045C08G18/44C08G18/4825C08G18/58C08G18/0823C08K2003/2241C08L33/04C08K3/22C08K3/34C08K5/5435C08L75/04C08G18/3206C08G18/348C08G18/3293C08G18/36
Inventor 李怡霞项羽曹苏毅李军配杨文东
Owner 浙江材华科技有限公司
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