CN111978845A - Preparation method of long-acting formaldehyde-removing coating - Google Patents

Abstract

The invention relates to the technical field of formaldehyde treatment, in particular to a preparation method and application of a long-acting formaldehyde-removing coating, which comprises the following components: 5-8 parts of modified silicon dioxide, 2-5 parts of modified magnesium hydroxide, 3-6 parts of zinc borate, 5-10 parts of diammonium hydrogen phosphate, 20-25 parts of lavender, 25-30 parts of wormwood, 15-20 parts of lemon, 10-15 parts of mint, 5-10 parts of almond, 10-20 parts of oligomer polyol, 1-3 parts of dihydroxy acid, 3-5 parts of isocyanate, 1-3 parts of a blocking agent, 0.3-0.6 part of triethylamine, 0.5-1 part of a film forming agent, 1-1.5 parts of an antifreezing agent, 0.2-0.5 part of a mildew inhibitor, 1-3 parts of a preservative, 1-3 parts of a flatting agent, 0.5-1 part of an ultraviolet absorbent, 0.5-1.5 part of a dispersing agent, 0.5-1 part of a defoaming agent and 0.5-1 part of a thickening agent, and the formaldehyde purification rate and the formaldehyde purification durability of the coating prepared by the invention are both obviously improved, the formaldehyde removal rate is up to more than 90%, and the added traditional Chinese medicine grass components have the effect of calming the nerves while removing formaldehyde and purifying air.

Description

Preparation method of long-acting formaldehyde-removing coating

Technical Field

The invention relates to the technical field of formaldehyde treatment, in particular to a preparation method and application of a long-acting formaldehyde-removing coating.

Background

Formaldehyde is a highly toxic substance that has been identified by the world health organization as a carcinogenic and teratogenic substance, a recognized source of allergy, and also one of the potentially potent mutagens. The research shows that: formaldehyde has strong carcinogenic and carcinogenic effects. It is well documented that formaldehyde affects human health primarily in olfactory abnormalities, irritations, allergies, lung dysfunction, liver dysfunction, and immune dysfunction. Chronic respiratory diseases, nasopharyngeal carcinoma, colon cancer, brain tumor, menstrual disorder, gene mutation of cell nucleus, DNA single-strand internal cross-linking, DNA and protein cross-linking, repair of DNA damage inhibition, pregnancy syndrome, chromosome abnormality of newborn, leukemia, and memory and intelligence deterioration of teenagers caused by long-term exposure to low-dose formaldehyde. Among all the contacters, children and pregnant women are particularly sensitive to formaldehyde, the harm is larger, the formaldehyde is caused by decoration and furniture pollution, the release period is as long as 3-15 years, the formaldehyde can be volatilized from deep layers of materials when meeting the heat and the moisture, the environment is seriously polluted, and the worldwide problem which is difficult to solve is solved.

The coating is a necessary material for home decoration, the requirement on the coating for decoration is higher and higher along with the enhancement of the environmental awareness of people at present, polyvinyl formal coatings with higher formaldehyde release ratio are gradually eliminated, various environment-friendly interior wall coatings which release negative ions and have low VOC are used more and more, the health and the environmental protection are further improved, and the problem that how to develop the environment-friendly green coating becomes more and more attention of people is raised. Particularly, in recent years, with the improvement of living standard of people, living conditions are improved, and the problem of environmental pollution caused by decoration pollution is gradually emphasized.

At present, the formaldehyde removal coating on the market is mainly a diatom ooze coating and an active carbon coating, and the diatom ooze composite nano zinc oxide and tourmaline in the diatom ooze coating are utilized to carry out photocatalytic reaction so as to achieve the effect of removing formaldehyde. In addition, the activated carbon coating can adsorb toxic gas in a room for a long time, eliminate peculiar smell and refresh the air. But through the formaldehyde removal capability test of the formaldehyde removal coating, the formaldehyde removal performance of the diatom ooze coating and the activated carbon coating is found to be insufficient, and the analysis reason is that the light contact area of the diatom ooze coating is limited, so that the capability of the diatom ooze coating for photodecomposition of formaldehyde is limited; the activated carbon only has adsorption capacity to formaldehyde, and the formaldehyde can not be removed after the adsorption is saturated. Therefore, the development of the low-cost formaldehyde-removing coating has great prospect.

Therefore, the application provides a preparation method and application of the long-acting formaldehyde-removing coating.

Disclosure of Invention

In order to solve the problems, the invention provides a preparation method of a long-acting formaldehyde removing coating, which has the characteristics of high removal rate and long-acting formaldehyde removal.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention provides a preparation method of a long-acting formaldehyde-removing coating, which comprises the following steps: step S01, adding 5-8 parts of modified silicon dioxide, 2-5 parts of modified magnesium hydroxide, 3-6 parts of zinc borate and 5-10 parts of diammonium hydrogen phosphate into a grinder, grinding for 10-15min, and sieving with a 80-100 mesh sieve to obtain an auxiliary material A for later use;

step S02, putting 20-25 parts of lavender, 25-30 parts of wormwood, 15-20 parts of lemon, 10-15 parts of mint and 5-10 parts of almond into a container, adding 1000 parts of 800-plus water, decocting and filtering to obtain an auxiliary material B for later use;

step S03, taking 10-20 parts of oligomer polyol, dehydrating in a vacuum oven at 120 ℃ for 1.5-2h, adding 2-8 parts of modified nano titanium dioxide, cooling after ultrasonic oscillation for 0.5h, placing the mixture in a flask, stirring, adding 1-3 parts of dihydroxy acid and 3-5 parts of isocyanate, placing the flask in an oil bath at 85 ℃ for reaction to obtain polyurethane polymer;

step SO4, taking out the flask obtained in the step S03, cooling for 0.5h, adding a proper amount of acetone into the flask, adding 1-3 parts of end-capping reagent, reacting for 2h at 25 ℃, adding 0.3-0.6 part of triethylamine, performing neutralization reaction for 10min, adding water dispersant and distilling off the acetone;

step S05, after removing the acetone in step S04, catalyzing for 0.5h by ultraviolet light with the wavelength range of 360 and 400nm, adding the auxiliary material A, and stirring for 10-15min to obtain a mixed solution for later use;

step S06, adding 0.5-1 part of film forming agent, 1-1.5 parts of antifreezing agent, 0.2-0.5 part of mildew preventive, 1-3 parts of preservative, 1-3 parts of flatting agent, 0.5-1 part of ultraviolet absorbent, 0.5-1.5 parts of dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of thickening agent and a proper amount of water into a stirrer, stirring for 10min, and adding auxiliary material B;

and step S07, adding the mixed solution in the step SO5 into the stirrer in the step S06, mixing and stirring for 0.5h to obtain the long-acting formaldehyde-removing paint.

Preferably, the preparation of modified magnesium hydroxide in step S01: adding alum and titanate coupling agent into magnesium hydroxide, placing into a kneading kettle, controlling the temperature at 50-55 ℃, fully and uniformly stirring for 1.5h, drying, and crushing to obtain the magnesium hydroxide.

Preferably, the modified silica in step S01 is prepared by synthesizing nano silica by Stober sol-gel method, and modifying with KH-550 silane coupling agent.

Preferably, before the lavender, the wormwood, the lemon, the mint and the almond in the step S02 are placed in a container, the lavender, the wormwood, the lemon, the mint and the almond are dried and crushed into 20-30 meshes, and the boiling temperature is 90-95 ℃.

Preferably, the preparation of the modified nano titanium dioxide in the step S03: adding 10-15 parts of nano titanium dioxide into a flask containing 40-60 parts of acetone, irradiating by ultraviolet light for 0.5h while performing ultrasonic oscillation, stirring for 0.5h at 1000r/min, adding 1-5 parts of isocyanate tripolymer while stirring, performing reflux reaction for 1-3h at 70-85 ℃, filtering off a solvent, cleaning by using acetone, and performing vacuum drying for 24 at 70 ℃ to obtain the nano titanium dioxide.

Preferably, the isocyanate trimer is any one or more of MDI trimer, HDI trimer and IPDI trimer; the isocyanate is any one of MDI, HDI, IPDI and TDI.

Preferably, the blocking agent is glycol amine.

Preferably, the oligomer polyol is one or more of polyester-based diol, polyether diol, polycaprolactone-based diol, polycarbonate-based diol, glycerol or castor oil, and the number average molecular weight of the oligomer polyol is 500-2000; the dicarboxylic acid is any one of adipic acid, glutaric acid, oxalic acid, malonic acid, succinic acid, dicarboxyl half ester and maleic anhydride.

Preferably, the film forming agent is dodecanol ester;

the preservative is Daoweishi-75;

the mildew inhibitor is 1, 2-benzisothiazolin-3-one;

the antifreezing agent is one or the combination of ethylene glycol and propylene glycol.

The invention provides an application of a long-acting formaldehyde-removing coating prepared by the preparation method of the long-acting formaldehyde-removing coating.

The technical scheme of the invention has the following beneficial technical effects:

the formaldehyde removal coating prepared by the invention has the advantages that the formaldehyde purification rate and the formaldehyde purification durability are both obviously improved, the formaldehyde removal rate is up to more than 90%, and the added traditional Chinese medicine grass components have the nerve calming effect while removing formaldehyde and purifying air.

Drawings

FIG. 1 is a schematic view of the preparation process of the present invention.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1, the scheme of the preparation method of the long-acting formaldehyde-removing coating provided by the invention is as follows:

example 1

A preparation method of a long-acting formaldehyde-removing coating comprises the following steps:

step S01, adding 5 parts of modified silicon dioxide, 2 parts of modified magnesium hydroxide, 3 parts of zinc borate and 5 parts of diammonium hydrogen phosphate into a grinder, grinding for 10min, and sieving by a 90-mesh sieve to obtain an auxiliary material A for later use;

step S02, putting 20 parts of lavender, 25 parts of wormwood, 15 parts of lemon, 10 parts of mint and 5 parts of almond into a container, adding 800 parts of water, decocting and filtering to obtain an auxiliary material B for later use;

step S03, taking 10 parts of oligomer polyol, dehydrating in a vacuum oven at 120 ℃ for 1.5h, adding 2 parts of modified nano titanium dioxide, cooling after ultrasonic oscillation for 0.5h, placing the mixture in a flask, stirring, adding 1 part of dihydroxy acid and 3 parts of isocyanate, and placing the flask in an oil bath at 85 ℃ for reaction to obtain polyurethane polymer;

step SO4, taking out the flask obtained in the step S03, cooling for 0.5h, adding an appropriate amount of acetone into the flask, adding 1 part of end-capping reagent, reacting for 2h at 25 ℃, adding 0.3 part of triethylamine, performing neutralization reaction for 10min, adding water dispersant, and distilling off the acetone;

step S05, after removing the acetone in step S04, catalyzing for 0.5h by ultraviolet light with the wavelength range of 360 and 400nm, adding the auxiliary material A, and stirring for 10min to obtain a mixed solution for later use;

step S06, adding 0.5 part of film forming agent, 1 part of antifreezing agent, 0.2 part of mildew preventive, 1 part of preservative, 1 part of flatting agent, 0.5 part of ultraviolet absorbent, 0.5 part of dispersing agent, 0.5 part of defoaming agent, 0.5 part of thickening agent and a proper amount of water into a stirrer, stirring for 10min, and adding auxiliary material B;

and step S07, adding the mixed solution in the step SO5 into the stirrer in the step S06, mixing and stirring for 0.5h to obtain the long-acting formaldehyde-removing paint.

Example 2

A preparation method of a long-acting formaldehyde-removing coating comprises the following steps:

step S01, adding 6 parts of modified silicon dioxide, 4 parts of modified magnesium hydroxide, 5 parts of zinc borate and 7 parts of diammonium hydrogen phosphate into a grinder, grinding for 12min, and sieving by a 90-mesh sieve to obtain an auxiliary material A for later use;

step S02, putting 22 parts of lavender, 28 parts of wormwood, 17 parts of lemon, 13 parts of mint and 7 parts of almond into a container, adding 900 parts of water, decocting and filtering to obtain an auxiliary material B for later use;

step S03, taking 15 parts of oligomer polyol, dehydrating in a vacuum oven at 120 ℃ for 1.5h, adding 5 parts of modified nano titanium dioxide, cooling after ultrasonic oscillation for 0.5h, placing the mixture in a flask, stirring, adding 2 parts of dihydroxy acid and 4 parts of isocyanate, and placing the flask in an oil bath at 85 ℃ for reaction to obtain polyurethane polymer;

step SO4, taking out the flask obtained in the step S03, cooling for 0.5h, adding an appropriate amount of acetone into the flask, adding 2 parts of end-capping reagent, reacting for 2h at 25 ℃, adding 0.5 part of triethylamine, performing neutralization reaction for 10min, adding water dispersant, and distilling off the acetone;

step S05, after removing the acetone in step S04, catalyzing for 0.5h by ultraviolet light with the wavelength range of 360 and 400nm, adding the auxiliary material A, and stirring for 12min to obtain a mixed solution for later use;

step S06, adding 0.8 part of film forming agent, 1.2 parts of antifreezing agent, 0.3 part of mildew preventive, 2 parts of preservative, 2 parts of flatting agent, 0.8 part of ultraviolet absorbent, 1 part of dispersant, 0.8 part of defoaming agent, 0.8 part of thickening agent and a proper amount of water into a stirrer, stirring for 10min, and adding auxiliary material B;

and step S07, adding the mixed solution in the step SO5 into the stirrer in the step S06, mixing and stirring for 0.5h to obtain the long-acting formaldehyde-removing paint.

Example 3

A preparation method of a long-acting formaldehyde-removing coating comprises the following steps:

step S01, adding 8 parts of modified silicon dioxide, 5 parts of modified magnesium hydroxide, 6 parts of zinc borate and 10 parts of diammonium hydrogen phosphate into a grinder, grinding for 15min, and sieving by a 100-mesh sieve to obtain an auxiliary material A for later use;

step S02, putting 25 parts of lavender, 30 parts of wormwood, 20 parts of lemon, 15 parts of mint and 10 parts of almond into a container, adding 1000 parts of water, decocting and filtering to obtain an auxiliary material B for later use;

step S03, taking 10-20 parts of oligomer polyol, dehydrating in a vacuum oven at 120 ℃ for 2 hours, adding 8 parts of modified nano titanium dioxide, cooling after ultrasonic oscillation for 0.5 hour, placing the mixture in a flask, stirring, adding 3 parts of dihydroxy acid and 5 parts of isocyanate, and placing the flask in an oil bath at 85 ℃ for reaction to obtain polyurethane polymer;

step SO4, taking out the flask obtained in the step S03, cooling for 0.5h, adding an appropriate amount of acetone into the flask, adding 3 parts of end-capping reagent, reacting for 2h at 25 ℃, adding 0.6 part of triethylamine, performing neutralization reaction for 10min, adding water dispersant, and distilling off the acetone;

step S05, after removing the acetone in step S04, catalyzing for 0.5h by ultraviolet light with the wavelength range of 360 and 400nm, adding the auxiliary material A, and stirring for 15min to obtain a mixed solution for later use;

step S06, adding 1 part of film forming agent, 1.5 parts of antifreezing agent, 0.5 part of mildew preventive, 3 parts of preservative, 3 parts of flatting agent, 1 part of ultraviolet absorbent, 1.5 parts of dispersing agent, 1 part of defoaming agent, 1 part of thickening agent and a proper amount of water into a stirrer, stirring for 10min, and adding auxiliary material B;

and step S07, adding the mixed solution in the step SO5 into the stirrer in the step S06, mixing and stirring for 0.5h to obtain the long-acting formaldehyde-removing paint.

Comparative example 1

A preparation method of a long-acting formaldehyde-removing coating comprises the following steps:

step S01, adding 8 parts of modified silicon dioxide, 5 parts of modified magnesium hydroxide, 6 parts of zinc borate and 10 parts of diammonium hydrogen phosphate into a grinder, grinding for 15min, and sieving by a 100-mesh sieve to obtain an auxiliary material A for later use;

step S02, taking 10-20 parts of oligomer polyol, dehydrating in a vacuum oven at 120 ℃ for 2 hours, adding 8 parts of modified nano titanium dioxide, cooling after ultrasonic oscillation for 0.5 hour, placing the mixture in a flask, stirring, adding 3 parts of dihydroxy acid and 5 parts of isocyanate, and placing the flask in an oil bath at 85 ℃ for reaction to obtain polyurethane polymer;

step SO3, taking out the flask obtained in the step S02, cooling for 0.5h, adding an appropriate amount of acetone into the flask, adding 3 parts of end-capping reagent, reacting for 2h at 25 ℃, adding 0.6 part of triethylamine, performing neutralization reaction for 10min, adding water dispersant, and distilling off the acetone;

step S04, after removing the acetone in step S03, catalyzing for 0.5h by ultraviolet light with the wavelength range of 360 and 400nm, adding the auxiliary material A, and stirring for 15min to obtain a mixed solution for later use;

step S05, adding 1 part of film forming agent, 1.5 parts of antifreezing agent, 0.5 part of mildew preventive, 3 parts of preservative, 3 parts of flatting agent, 1 part of ultraviolet absorbent, 1.5 parts of dispersing agent, 1 part of defoaming agent, 1 part of thickening agent and a proper amount of water into a stirrer and stirring for 10 min;

and step S06, adding the mixed solution in the step SO4 into the stirrer in the step S05, mixing and stirring for 0.5h to obtain the long-acting formaldehyde-removing paint.

For a better understanding of the present invention, the following experiments were conducted with respect to 5 test chambers under the same environment, and the following experimental data were obtained.

As can be seen from the above table, the formaldehyde removal rates of comparative example 1, examples 1, 2, and 3 are as high as 90% or more, respectively: 92.4 percent, 93.4 percent, 94.2 percent and 97.5 percent, and has obvious formaldehyde removing effect; through a month experiment, the conclusion can be drawn that the coating prepared by the invention has the characteristic of long-acting formaldehyde removal.

In addition, according to comparative example 1, the addition of the traditional Chinese medicine herbs in the invention further promotes the removal of formaldehyde, and the effect is remarkable.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A preparation method of a long-acting formaldehyde-removing coating is characterized by comprising the following preparation steps:

step S01, adding 5-8 parts of modified silicon dioxide, 2-5 parts of modified magnesium hydroxide, 3-6 parts of zinc borate and 5-10 parts of diammonium hydrogen phosphate into a grinder, grinding for 10-15min, and sieving with a 80-100 mesh sieve to obtain an auxiliary material A for later use;

step S02, putting 20-25 parts of lavender, 25-30 parts of wormwood, 15-20 parts of lemon, 10-15 parts of mint and 5-10 parts of almond into a container, adding 1000 parts of 800-plus water, decocting and filtering to obtain an auxiliary material B for later use;

step S03, taking 10-20 parts of oligomer polyol, dehydrating in a vacuum oven at 120 ℃ for 1.5-2h, adding 2-8 parts of modified nano titanium dioxide, cooling after ultrasonic oscillation for 0.5h, placing the mixture in a flask, stirring, adding 1-3 parts of dihydroxy acid and 3-5 parts of isocyanate, placing the flask in an oil bath at 85 ℃ for reaction to obtain polyurethane polymer;

step SO4, taking out the flask obtained in the step S03, cooling for 0.5h, adding a proper amount of acetone into the flask, adding 1-3 parts of end-capping reagent, reacting for 2h at 25 ℃, adding 0.3-0.6 part of triethylamine, performing neutralization reaction for 10min, adding water dispersant and distilling off the acetone;

step S05, after removing the acetone in step S04, catalyzing for 0.5h by ultraviolet light with the wavelength range of 360 and 400nm, adding the auxiliary material A, and stirring for 10-15min to obtain a mixed solution for later use;

step S06, adding 0.5-1 part of film forming agent, 1-1.5 parts of antifreezing agent, 0.2-0.5 part of mildew preventive, 1-3 parts of preservative, 1-3 parts of flatting agent, 0.5-1 part of ultraviolet absorbent, 0.5-1.5 parts of dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of thickening agent and a proper amount of water into a stirrer, stirring for 10min, and adding auxiliary material B;

and step S07, adding the mixed solution in the step SO5 into the stirrer in the step S06, mixing and stirring for 0.5h to obtain the long-acting formaldehyde-removing paint.

2. The method for preparing the long-acting formaldehyde-removing coating according to claim 1, wherein the modified magnesium hydroxide in the step S01 is prepared by the following steps: adding alum and titanate coupling agent into magnesium hydroxide, placing into a kneading kettle, controlling the temperature at 50-55 ℃, fully and uniformly stirring for 1.5h, drying, and crushing to obtain the magnesium hydroxide.

3. The method for preparing the long-acting formaldehyde-removing coating as claimed in claim 1, wherein the modified silica in step S01 is prepared by synthesizing nano silica by a Stober sol-gel method and modifying the nano silica by a KH-550 silane coupling agent.

4. The method for preparing the long-acting formaldehyde-removing coating according to claim 1, wherein before the lavender, the wormwood, the lemon, the mint and the almond are placed in a container in the step S02, the lavender, the wormwood, the lemon, the mint and the almond are dried in the air and crushed to 20-30 meshes, and the boiling temperature is 90-95 ℃.

5. The method for preparing the long-acting formaldehyde-removing coating according to claim 1, wherein the modified nano titanium dioxide is prepared in step S03 by: adding 10-15 parts of nano titanium dioxide into a flask containing 40-60 parts of acetone, irradiating by ultraviolet light for 0.5h while performing ultrasonic oscillation, stirring for 0.5h at 1000r/min, adding 1-5 parts of isocyanate tripolymer while stirring, performing reflux reaction for 1-3h at 70-85 ℃, filtering off a solvent, cleaning by using acetone, and performing vacuum drying for 24 at 70 ℃ to obtain the nano titanium dioxide.

6. The method for preparing the long-acting formaldehyde-removing coating according to claim 5, wherein the isocyanate trimer is any one or more of MDI trimer, HDI trimer and IPDI trimer; the isocyanate is any one of MDI, HDI, IPDI and TDI.

7. The method for preparing the long-acting formaldehyde-removing coating according to claim 1, wherein the blocking agent is glycol amine.

8. The method as claimed in claim 1, wherein the oligomer polyol is one or more of polyester-based diol, polyether diol, polycaprolactone-based diol, polycarbonate-based diol, glycerol or castor oil, and has a number average molecular weight of 500-2000; the dicarboxylic acid is any one of adipic acid, glutaric acid, oxalic acid, malonic acid, succinic acid, dicarboxyl half ester and maleic anhydride.

9. The method for preparing the long-acting formaldehyde-removing coating according to claim 1,

the film forming agent is dodecanol ester;

the preservative is Daoweishi-75;

the mildew inhibitor is 1, 2-benzisothiazolin-3-one;

the antifreezing agent is one or the combination of ethylene glycol and propylene glycol.

10. Use of a long-acting formaldehyde-removing coating prepared by the method according to any one of claims 1-9.

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