阅读说明：本技术 一种阻燃低气味木门涂料的制备方法 (Preparation method of flame-retardant low-odor wooden door coating ) 是由 谷庆 于 2019-10-30 设计创作，主要内容包括：本发明公开一种阻燃低气味木门涂料的制备方法,包括以下步骤：(1)将聚氨酯乳液、二甲基硅油、醋酸乙烯乳液依次添加到反应釜中,得到预备体；(2)将硅藻土均匀分散到水玻璃中,得到水玻璃混合液,然后再向水玻璃混合液中添加磷酸铵与过氧化物,得到硅藻土复合料；(3)将羟甲基纤维素添加到硫酸与磷酸混合溶液中,再添加三聚氰胺,得到增强料；(4)将预备体、硅藻土复合料、增强料、表面活性剂、去离子水、消泡剂依次添加到搅拌机中,搅拌,即得；本发明提供的一种阻燃低气味木门涂料的制备方法,采用水性涂料,避免了有机溶剂的使用,环保气味低,极大的避免了有机溶剂型涂料易于释放大量的甲醛。(The invention discloses a preparation method of a flame-retardant low-odor wooden door coating, which comprises the following steps: (1) sequentially adding polyurethane emulsion, dimethyl silicone oil and vinyl acetate emulsion into a reaction kettle to obtain a prepared body; (2) uniformly dispersing diatomite into water glass to obtain a water glass mixed solution, and then adding ammonium phosphate and peroxide into the water glass mixed solution to obtain a diatomite composite material; (3) adding hydroxymethyl cellulose into a mixed solution of sulfuric acid and phosphoric acid, and then adding melamine to obtain a reinforcing material; (4) sequentially adding the prepared body, the diatomite composite material, the reinforcing material, the surfactant, the deionized water and the defoaming agent into a stirrer, and stirring to obtain the diatomite composite material; according to the preparation method of the flame-retardant low-odor wood door coating, provided by the invention, the water-based coating is adopted, the use of an organic solvent is avoided, the environment-friendly odor is low, and the organic solvent type coating is greatly prevented from easily releasing a large amount of formaldehyde.)

1. The preparation method of the flame-retardant low-odor wooden door coating is characterized by comprising the following steps of:

(1) sequentially adding polyurethane emulsion, dimethyl silicone oil and vinyl acetate emulsion into a reaction kettle, heating to 75-80 ℃, stirring at the rotating speed of 800r/min for 20min, and standing for 1 hour to obtain a preparation body;

(2) uniformly dispersing diatomite into water glass, heating to 72 ℃, stirring for 35min to obtain a water glass mixed solution, then adding ammonium phosphate and peroxide into the water glass mixed solution, carrying out water bath heat preservation and stirring for 40min at 80 ℃, then carrying out rotary evaporation, and drying to constant weight to obtain a diatomite composite material;

(3) mixing hydroxymethyl cellulose according to the weight ratio of 100 g: adding 180ml of 150-180ml of the mixture into a sulfuric acid and phosphoric acid mixed solution, stirring and reacting for 30-35min at 35 ℃, then adding melamine with 5% of the mass of the hydroxymethyl cellulose, continuing stirring for 1 hour under the protection of inert gas, performing ultrasonic dispersion for 10min, then adjusting the pH value to be neutral, and finally performing rotary evaporation and drying to constant weight to obtain a reinforcing material;

(4) adding 80-85 parts by weight of the preparation, 18-20 parts by weight of the diatomite composite material, 6-8 parts by weight of the reinforcing material, 1-2 parts by weight of the surfactant, 35-40 parts by weight of deionized water and 1-2 parts by weight of the defoaming agent into a stirrer in sequence, and stirring at the rotating speed of 3000r/min for 2 hours to obtain the diatomite composite material.

2. The method for preparing the flame-retardant low-odor wood door coating as claimed in claim 1, wherein the mixing mass ratio of the polyurethane emulsion, the simethicone and the vinyl acetate emulsion is 15-18:1-2: 3-5.

3. The preparation method of the flame-retardant low-odor wooden door coating as claimed in claim 1, wherein the mass ratio of the diatomite to the sodium silicate to the water in the water glass mixed solution is as follows: 1: 4:10.

4. The method for preparing a flame-retardant low-odor wooden door coating as claimed in claim 1, wherein the addition amount of ammonium phosphate is 25% of the mass of the diatomite, and the addition amount of peroxide is 1.2% of the mass of the diatomite.

5. The method of claim 1 or 4 wherein said peroxide is toluoyl peroxide.

6. The method for preparing the flame-retardant low-odor wooden door coating as claimed in claim 1, wherein the mass fraction of sulfuric acid and phosphoric acid in the mixed solution is 3.5%, and the mass fraction of phosphoric acid is 8%.

7. The method of claim 1 wherein the inert gas is helium.

8. The method of claim 1 wherein the ultrasonic dispersion power is 500W and the frequency is 40 kHz.

9. The method of claim 1 wherein the surfactant is sodium lauryl sulfate.

10. The method for preparing a flame retardant low odor wood door coating according to claim 1 wherein the defoamer is a silicone defoamer.

Technical Field

The invention belongs to the technical field of wooden door processing, and particularly relates to a preparation method of a flame-retardant low-odor wooden door coating.

Background

The door occupies a very important position in life, the application range of the prior wooden door in family is very wide, however, with the increasing demand of people on the function of the wooden door, the details needing to be processed in the processing process of the wooden door are more and more, and because the wooden door adopts wooden materials, the wooden door belongs to flammable materials, if a fire disaster occurs, the wooden door is extremely easy to burn, so that the problem which needs to be solved at present is to improve the flame retardant property of the wooden door.

Disclosure of Invention

The purpose of this project is to better store sweet potatoes in southern areas.

The invention is realized by the following technical scheme.

A preparation method of a flame-retardant low-odor wooden door coating comprises the following steps:

(1) sequentially adding polyurethane emulsion, dimethyl silicone oil and vinyl acetate emulsion into a reaction kettle, heating to 75-80 ℃, stirring at the rotating speed of 800r/min for 20min, and standing for 1 hour to obtain a preparation body;

(2) uniformly dispersing diatomite into water glass, heating to 72 ℃, stirring for 35min to obtain a water glass mixed solution, then adding ammonium phosphate and peroxide into the water glass mixed solution, carrying out water bath heat preservation and stirring for 40min at 80 ℃, then carrying out rotary evaporation, and drying to constant weight to obtain a diatomite composite material;

(3) mixing hydroxymethyl cellulose according to the weight ratio of 100 g: adding 180ml of 150-180ml of the mixture into a sulfuric acid and phosphoric acid mixed solution, stirring and reacting for 30-35min at 35 ℃, then adding melamine with 5% of the mass of the hydroxymethyl cellulose, continuing stirring for 1 hour under the protection of inert gas, performing ultrasonic dispersion for 10min, then adjusting the pH value to be neutral, and finally performing rotary evaporation and drying to constant weight to obtain a reinforcing material;

(4) adding 80-85 parts by weight of the preparation, 18-20 parts by weight of the diatomite composite material, 6-8 parts by weight of the reinforcing material, 1-2 parts by weight of the surfactant, 35-40 parts by weight of deionized water and 1-2 parts by weight of the defoaming agent into a stirrer in sequence, and stirring at the rotating speed of 3000r/min for 2 hours to obtain the diatomite composite material.

As a further technical scheme, the mixing mass ratio of the polyurethane emulsion, the dimethyl silicone oil and the vinyl acetate emulsion is 15-18:1-2: 3-5.

As a further technical scheme, the mass ratio of the diatomite to the sodium silicate to the water in the water glass mixed solution is as follows: 1: 4:10.

In a further embodiment, the amount of ammonium phosphate added is 25% by mass of diatomaceous earth, and the amount of peroxide added is 1.2% by mass of diatomaceous earth.

In a further aspect, the peroxide is toluoyl peroxide.

As a further technical scheme, in the mixed solution of sulfuric acid and phosphoric acid, the mass fraction of sulfuric acid is 3.5%, and the mass fraction of phosphoric acid is 8%.

As a further technical scheme, the inert gas is helium.

As a further technical scheme, the power of the ultrasonic dispersion is 500W, and the frequency is 40 kHz.

As a further technical scheme, the surfactant is sodium lauryl sulfate.

As a further technical scheme, the defoaming agent is an organic silicon defoaming agent.

According to the technical scheme, the beneficial effects of the invention are as follows:

the invention provides a preparation method of a flame-retardant low-odor wood door coating, which adopts a water-based coating, avoids the use of an organic solvent, has low environmental-friendly odor, greatly avoids the problem that organic solvent type coatings easily release a large amount of formaldehyde and influence the health and safety of people, adopts a reasonable proportion to construct an expansion flame-retardant system of the wood door coating through a diatomite composite material and a reinforcing material, can generate a large amount of non-combustible gas when the diatomite composite material is contacted with and combusted, isolates oxygen, inhibits the combustion, has a special structure of the reinforcing material, can decompose and generate non-combustible phosphoric acid, metaphosphoric acid and metal phosphate to cover the surface of the diatomite composite material in the heated combustion process of polyurethane, promotes the water polyurethane to be dehydrated and carbonized, and plays a role in heat insulation and oxygen insulation; the melamine cyanide serving as a gas source and an acid source can be decomposed by heating to generate a large amount of non-combustible gas, the oxygen content around the polyurethane coating is further diluted and isolated, the heat generated by combustion is reduced, and meanwhile, the diatomite composite material has the functions of promoting carbon formation and covering, so that the flame retardant property of the polyurethane coating is further improved; meanwhile, the reinforcing material is uniformly dispersed in the coating system, and can be combined with polymer macromolecular chains in the coating system to form a stable crosslinking system, so that the impact resistance of the cured coating is greatly improved.

Detailed Description