阅读说明：本技术 一种隔热专用底漆及其制备方法 (Special primer for heat insulation and preparation method thereof ) 是由 孟运 孟奎 于 2019-10-26 设计创作，主要内容包括：本发明公开了一种隔热专用底漆及其制备方法,涉及水性涂料技术领域,解决了因底漆在使用过程中的隔热性能不佳,而导致其整体应用效果不佳的问题。一种隔热专用底漆,其包括如下重量份数的组分：有机硅-丙烯酸乳液30-40份；玻璃微珠4-6份；膨胀珍珠岩3-5份；去离子水20-25份；Tex成膜剂0.5-1.5份；PT86防霉剂0.2-0.6份；异辛基三乙氧基硅烷4-6份；聚偏氟乙烯2-3份；纳米氧化锌1.6-2.4份；消泡剂0.2-0.5份；填料8-12份；增稠剂0.5-0.9份；防沉剂0.1-0.5份；聚乙二醇3-5份。本发明中的隔热专用底漆在使用后所形成的涂层能够发挥出良好稳定的隔热效果,整体应用性好。(The invention discloses a primer special for heat insulation and a preparation method thereof, relates to the technical field of water-based coatings, and solves the problem of poor overall application effect of the primer due to poor heat insulation performance in the using process. The special primer for heat insulation comprises the following components in parts by weight: 30-40 parts of organosilicon-acrylic emulsion; 4-6 parts of glass beads; 3-5 parts of expanded perlite; 20-25 parts of deionized water; 0.5-1.5 parts of Tex film forming agent; 0.2-0.6 part of PT86 mildew preventive; 4-6 parts of isooctyl triethoxysilane; 2-3 parts of polyvinylidene fluoride; 1.6-2.4 parts of nano zinc oxide; 0.2-0.5 part of defoaming agent; 8-12 parts of a filler; 0.5-0.9 part of thickening agent; 0.1-0.5 part of anti-settling agent; 3-5 parts of polyethylene glycol. The coating formed by the primer special for heat insulation in the invention after use can exert good and stable heat insulation effect, and the whole applicability is good.)

1. The special primer for heat insulation is characterized by comprising the following components in parts by weight:

30-40 parts of organosilicon-acrylic emulsion;

20-25 parts of deionized water;

4-6 parts of glass beads;

3-5 parts of expanded perlite;

0.5-1.5 parts of Tex film forming agent;

0.2-0.6 part of PT86 mildew preventive;

4-6 parts of isooctyl triethoxysilane;

2-3 parts of polyvinylidene fluoride;

1.6-2.4 parts of nano zinc oxide;

0.2-0.5 part of defoaming agent;

8-12 parts of a filler;

0.5-0.9 part of thickening agent;

0.1-0.5 part of anti-settling agent;

3-5 parts of polyethylene glycol.

2. The special primer for heat insulation according to claim 1, wherein 3-7 parts by weight of functional additives are further added into the components of the special primer for heat insulation, the functional additives are a mixture of titanium dioxide and hollow glass beads, and the weight ratio of the titanium dioxide to the hollow glass beads is 1: (0.9-1.3).

3. The special primer for heat insulation according to claim 1, wherein 10-14 parts by weight of silica aerogel is further added to the components of the special primer for heat insulation.

4. The special primer for heat insulation according to claim 1, wherein the filler is selected from one or more of talcum powder, mica powder, silicon carbide, carbon fiber, glass fiber and aluminum silicate fiber.

5. The primer specially used for heat insulation according to claim 1, wherein the defoamer is any one of silicone emulsion, polyoxypropylene glycerol ether and polydimethylsiloxane.

6. The primer specially used for heat insulation according to claim 1, wherein the thickener is any one of sodium carboxymethylcellulose, sodium polyacrylate and hydroxyethyl cellulose.

7. The primer specially used for heat insulation according to claim 1, wherein the anti-settling agent is any one of organic bentonite, fumed silica, polyethylene wax and polyamide wax.

8. The preparation method of the special primer for heat insulation according to claim 1, characterized by comprising the following steps:

step one, adding water, polyethylene glycol, a defoaming agent and an anti-settling agent in corresponding parts by weight into a reaction vessel, wherein the stirring speed is 300-500rpm, and the time is 3-5 min;

secondly, continuously adding the corresponding parts by weight of organosilicon-acrylic acid emulsion, isooctyltriethoxysilane, polyvinylidene fluoride and nano zinc oxide into the reaction vessel, wherein the stirring speed is 900-1300rpm, and the time is 20-30 min;

thirdly, adding the filler, the glass beads and the expanded perlite in corresponding parts by weight into the reaction vessel at the stirring speed of 1200-1500rpm for 10-20 min;

and step four, finally adding the Tex film-forming agent, the PT86 mildew preventive and the thickening agent in corresponding parts by weight, stirring at 800rpm for 10-15min at the stirring speed, and thus obtaining the special primer for heat insulation.

Technical Field

The invention relates to the technical field of water-based paint, in particular to primer special for heat insulation and a preparation method thereof.

Background

The primer is the first layer of the paint system and is used for improving the adhesive force of the finish paint, increasing the fullness of the finish paint, providing alkali resistance, providing an anti-corrosion function and the like, and simultaneously ensuring the uniform absorption of the finish paint so that the paint system can exert the best effect.

In the chinese patent application publication No. CN104277642A, a method for using a water-based mold-proof primer is disclosed, which comprises: according to the following steps of water-based mildew-proof paint priming paint: water 1: 0.1-0.3, uniformly stirring, spraying on a base material, then air-drying for 5-15 minutes, and curing to obtain a coating; the water-based mildew-proof primer is prepared from 30-40% of organic silicon-acrylic emulsion, 22-28% of a mixture of protective mildew-proof capsule spores and rubber powder in a weight ratio of 3:1, 20-25% of deionized water, 8-12% of filler, 5-7% of auxiliary agent, 0.2-0.5% of defoaming agent, 0.1-0.5% of preservative and 0.5-0.9% of thickening agent.

In the above application documents, the protective mildew-proof capsule beads can continuously and effectively release active substances, and act with the rubber powder, so as to achieve long-term effective mildew-proof effect, and improve the elasticity of a paint film, but the rubber powder is easily affected by the external environment in the using process and is aged, and the aged rubber powder greatly reduces the overall quality, so that the overall heat-insulating property of the water-based mildew-proof primer is easily reduced, and the overall application effect is poor, therefore, a new scheme needs to be provided to solve the above problems.

Disclosure of Invention

The invention aims to provide a primer special for heat insulation, which aims to solve the technical problem that the whole application effect of the primer is poor due to poor heat insulation performance of the primer in the using process in the prior art, and can exert good and stable heat insulation effect in the using process.

In order to achieve the first purpose, the invention provides the following technical scheme:

the special primer for heat insulation comprises the following components in parts by weight:

30-40 parts of organosilicon-acrylic emulsion;

4-6 parts of glass beads;

3-5 parts of expanded perlite;

20-25 parts of deionized water;

0.5-1.5 parts of Tex film forming agent;

0.2-0.6 part of PT86 mildew preventive;

4-6 parts of isooctyl triethoxysilane;

2-3 parts of polyvinylidene fluoride;

1.6-2.4 parts of nano zinc oxide;

0.2-0.5 part of defoaming agent;

8-12 parts of a filler;

0.5-0.9 part of thickening agent;

0.1-0.5 part of anti-settling agent;

3-5 parts of polyethylene glycol.

By adopting the technical scheme, the organic silicon-acrylic emulsion is the main component of the special primer for heat insulation, has good weather resistance, gloss and adhesive force, and ensures that the coating of the special primer for heat insulation has good tearing resistance and durability after being used. Polyethylene glycol is a good dispersant, and is beneficial to fully mixing raw materials of all components together. The Tex film forming agent is beneficial to enabling the special thermal insulation primer to form a stable film structure after being used, and the PT86 mildew preventive agent can prolong the effective time of the special thermal insulation primer after being stored and used. The glass beads and the expanded perlite have good heat-insulating property, and the integral structural strength of the paint film can be improved.

The nano zinc oxide is a good physical sun-screening agent, has good shielding effect on ultraviolet rays, has an outstanding antibacterial effect, and is beneficial to improving the stability of the primer special for heat insulation. The polyvinylidene fluoride has good chemical corrosion resistance, high temperature resistance, oxidation resistance, weather resistance and ray radiation resistance. Meanwhile, the nano zinc oxide has small particle size, large specific surface area, right surface atomic number and serious insufficient coordination, so that the nano zinc oxide can easily perform bonding with fluorine in polyvinylidene fluoride, the stable heat insulation performance of the special primer for heat insulation is greatly improved, and the added isooctyltriethoxysilane can form a net film structure by hydrolysis and condensation of alkoxy groups, and has a good synergistic effect with the nano zinc oxide and the polyvinylidene fluoride, so that the special primer for heat insulation can perform a good and stable heat insulation effect in the using process, and the whole application effect is excellent.

More preferably, the primer special for heat insulation also comprises 3-7 parts by weight of functional auxiliary agent, the functional auxiliary agent is a mixture of titanium dioxide and hollow glass beads, and the weight part ratio of the titanium dioxide to the hollow glass beads is 1: (0.9-1.3).

By adopting the technical scheme, the hollow glass beads are thin-wall hollow microspheres, the main component of the outer thin wall of the hollow glass beads is sodium borosilicate, the hollow glass beads have the advantages of small heat conductivity coefficient, high and low temperature resistance and good thermal stability, and the inert gas in the hollow glass beads has the unique performance of heat insulation; the titanium dioxide has stronger heat insulation effect; titanium dioxide and hollow glass beads are compounded to serve as functional auxiliaries, so that the effects of reflecting solar radiation and preventing heat conduction can be well exerted, and the coating of the primer special for heat insulation has a good and stable light-reflecting heat-insulating effect.

More preferably, 10-14 parts by weight of silica aerogel is further added into the components of the primer special for heat insulation.

By adopting the technical scheme, the silicon dioxide aerogel is a good heat insulation material, but the silicon dioxide aerogel is rich in a porous nano network structure, can play a good compounding synergistic effect with nano zinc oxide, polyvinylidene fluoride and isooctyl triethoxysilane, and forms a compact and stable multi-stage heat insulation structure in the special heat insulation primer coating, so that the special heat insulation primer can play a good and stable heat insulation effect in the using process.

Preferably, the filler is one or a mixture of more of talcum powder, mica powder, silicon carbide, carbon fiber, glass fiber and aluminum silicate fiber.

By adopting the technical scheme, the talcum powder, the mica powder, the silicon carbide, the carbon fiber, the glass fiber and the aluminum silicate fiber are good fillers, have good dispersibility in the special primer for heat insulation, have good associativity with raw materials of all components, have good high temperature resistance, friction resistance, corrosion resistance, high mechanical strength and the like, and ensure that the whole special primer for heat insulation has good quality.

More preferably, the defoaming agent is any one of silicone emulsion, polyoxypropylene glycerol ether and polydimethylsiloxane.

Through adopting above-mentioned technical scheme, in production or in-service use process, because the stirring, make the air get into the inside formation micro bubble of thermal-insulated special priming paint easily, when thermal-insulated special priming paint in the curing process, its inside micro bubble takes place the migration easily and gathers together and form great bubble, and the defoaming agent has the effect of good bubble of getting rid of, makes thermal-insulated special priming paint be difficult for appearing great bubble in the inside after the curing forming, and then makes thermal-insulated special priming paint can exert good stable thermal-insulated effect in the use.

More preferably, the thickener is any one of sodium carboxymethylcellulose, sodium polyacrylate and hydroxyethyl cellulose.

By adopting the technical scheme, the sodium carboxymethylcellulose, the sodium polyacrylate and the hydroxyethyl cellulose are good thickening agents, the viscosity of the special thermal insulation primer can be improved, the special thermal insulation primer is kept in a uniform and stable suspension state, and the storage stability and the integral using effect of the special thermal insulation primer are favorably ensured.

More preferably, the anti-settling agent is any one of organic bentonite, fumed silica, polyethylene wax and polyamide wax.

By adopting the technical scheme, the organic bentonite, the fumed silica, the polyethylene wax and the polyamide wax can ensure that the coating has thixotropy, the viscosity is greatly improved, the filler can be prevented from settling in the special heat-insulating primer, the special heat-insulating primer is favorably stored, and the raw materials of all the components can be fully mixed.

The second purpose of the invention is to provide a preparation method of the primer special for heat insulation, and the primer special for heat insulation prepared by the method can exert good and stable heat insulation effect in the using process.

In order to achieve the second purpose, the invention provides the following technical scheme, which comprises the following steps:

step one, adding water, polyethylene glycol, a defoaming agent and an anti-settling agent in corresponding parts by weight into a reaction vessel, wherein the stirring speed is 300-500rpm, and the time is 3-5 min;

secondly, continuously adding the corresponding parts by weight of organosilicon-acrylic acid emulsion, isooctyltriethoxysilane, polyvinylidene fluoride and nano zinc oxide into the reaction vessel, wherein the stirring speed is 900-1300rpm, and the time is 20-30 min;

thirdly, adding the filler, the glass beads and the expanded perlite in corresponding parts by weight into the reaction vessel at the stirring speed of 1200-1500rpm for 10-20 min;

and step four, finally adding the Tex film-forming agent, the PT86 mildew preventive and the thickening agent in corresponding parts by weight, stirring at 800rpm for 10-15min at the stirring speed, and thus obtaining the special primer for heat insulation.

By adopting the technical scheme, the stable slurry is prepared firstly, so that isooctyltriethoxysilane, polyvinylidene fluoride and nano zinc oxide are combined fully, then the filler, the glass beads and the expanded perlite are added and stirred at high speed, so that the filler is dispersed fully in a mixed system, finally the Tex film-forming agent, the PT86 mildew inhibitor and the thickening agent are added, and the special primer for heat insulation can be obtained after stirring, and the prepared special primer for heat insulation has good quality. Meanwhile, the process is simple to operate, high in production efficiency, free of great pollution to the environment and good in applicability in the actual use process.

In summary, compared with the prior art, the invention has the following beneficial effects:

(1) isooctyl triethoxysilane, polyvinylidene fluoride and nano zinc oxide are added, and the components have good compound synergistic effect, so that the primer special for heat insulation can exert good and stable heat insulation effect in the using process, and the overall application effect is excellent;

(2) the functional assistant consisting of titanium dioxide and hollow glass beads is added, so that the effects of reflecting solar radiation and preventing heat conduction can be well exerted, and the coating of the primer special for heat insulation has a good and stable light-reflecting heat-insulating effect;

(3) the silicon dioxide aerogel is added, and can play a good compounding synergistic effect with the nano zinc oxide, the polyvinylidene fluoride and the isooctyl triethoxysilane, and a compact and stable multi-stage heat insulation structure is formed in the heat insulation special primer coating, so that the heat insulation special primer can play a good and stable heat insulation effect in the using process.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and examples.