阅读说明：本技术 一种金属屋面钢结构防水涂料及其制备方法 (Waterproof coating for metal roof steel structure and preparation method thereof ) 是由 刘小梅 赵云涛 王增寿 张雨 郝亮 丁嘉劲 张瑞 于 2021-08-02 设计创作，主要内容包括：本发明提供了一种金属屋面钢结构防水涂料及其制备方法,所述金属屋面钢结构防水涂料主要由以下原料制得：以质量份数计,醋酸乙烯-乙烯共聚乳液60-90份、丙烯酸共聚乳液30-50份、纳米材料10-20份、颜料5-10份、填料30-50份、分散剂1-5份、消泡剂1-5份、成膜助剂6-9份、水8-16份。本发明以醋酸乙烯-乙烯共聚乳液为基料、掺杂高弹性丙烯酸共聚乳液,共混后溶液的表面张力更低,有利于对钢结构表面的附着和浸润,提高了涂料的防水效果。(The invention provides a waterproof coating for a metal roof steel structure and a preparation method thereof, wherein the waterproof coating for the metal roof steel structure is mainly prepared from the following raw materials: by mass, 60-90 parts of vinyl acetate-ethylene copolymer emulsion, 30-50 parts of acrylic acid copolymer emulsion, 10-20 parts of nano material, 5-10 parts of pigment, 30-50 parts of filler, 1-5 parts of dispersant, 1-5 parts of defoaming agent, 6-9 parts of film-forming assistant and 8-16 parts of water. The invention takes vinyl acetate-ethylene copolymer emulsion as a base material and is doped with high-elasticity acrylic copolymer emulsion, the surface tension of the blended solution is lower, the adhesion and infiltration to the surface of a steel structure are facilitated, and the waterproof effect of the coating is improved.)

1. The waterproof paint for the metal roof steel structure is characterized by being mainly prepared from the following raw materials: by mass, 60-90 parts of vinyl acetate-ethylene copolymer emulsion, 30-50 parts of acrylic acid copolymer emulsion, 10-20 parts of nano material, 5-10 parts of pigment, 30-50 parts of filler, 1-5 parts of dispersant, 1-5 parts of defoaming agent, 6-9 parts of film-forming assistant and 8-16 parts of water.

2. The waterproof paint for the metal roof steel structure, according to claim 1, is characterized by comprising, by mass, 70-80 parts of vinyl acetate-ethylene copolymer emulsion, 35-45 parts of acrylic copolymer emulsion, 12-18 parts of nano materials, 6-9 parts of pigment, 35-45 parts of filler, 1-3 parts of dispersant, 1-3 parts of defoamer, 7-8 parts of film forming additive and 10-14 parts of water.

3. The metal roofing steel structure waterproof coating according to claim 1, characterized in that, by mass, the coating comprises 75 parts of vinyl acetate-ethylene copolymer emulsion, 40 parts of acrylic copolymer emulsion, 15 parts of nano material, 7.5 parts of pigment, 40 parts of filler, 2.5 parts of dispersant, 2.5 parts of defoaming agent, 7.5 parts of film forming additive and 12 parts of water.

4. The metal roofing steel structure waterproof paint according to claim 1, wherein the nano material is at least one of nano titanium oxide, nano silicon oxide or nano zinc oxide.

5. The waterproof paint for metal roofing steel structures as claimed in claim 1, wherein the pigment is at least one of titanium dioxide or carbon black.

6. The waterproof paint for metal roofing steel structures as claimed in claim 1, wherein the filler is prepared by mixing kaolin, diatomite and nano silica.

7. The waterproof paint for metal roofing steel structures as claimed in claim 6, wherein the mass ratio of the kaolin, the diatomite and the nano silica is (4-6): (2-3): (1-3).

8. The preparation method of the waterproof coating for the metal roofing steel structure according to any one of claims 1 to 7, characterized by comprising the following steps:

(1) mixing the vinyl acetate-ethylene copolymer emulsion and the acrylic acid copolymer emulsion in proportion, and stirring uniformly to obtain a water-based emulsion;

(2) and (2) sequentially adding the nano material, the pigment, the filler, the dispersing agent, the defoaming agent, the film forming assistant and water into the water-based emulsion obtained in the step (1) according to a proportion, and then fully and uniformly stirring to obtain the waterproof coating for the metal roof and the steel structure.

9. The method according to claim 8, wherein the filler is added to step (2) after grinding.

10. The method as claimed in claim 8, wherein the stirring speed in step (1) is 100-150r/min, and the stirring time is 1-2 h; the stirring speed in the step (2) is 200-250r/min, and the stirring time is 6-8 h.

Technical Field

The invention relates to the technical field of roof waterproof coatings, in particular to a metal roof steel structure waterproof coating and a preparation method thereof.

Background

Through market research, the phenomenon of water leakage of most metal roof steel structures in China is serious at present, the phenomenon is more prominent in southern areas, even the phenomenon of water leakage of factory buildings and offices of some steel structure manufacturers is common, and the water leakage is mainly concentrated at the positions of overlapping of contour plates, a roof lighting strip, connection of a gutter steel plate and a cement wall surface and the like. However, the current waterproof materials on the market, such as silica gel and APP, cannot solve the water leakage problem of the metal roof steel structure well, and it is difficult to have good adhesion on the special base material, especially the metal roof steel structure with high adhesion requirement.

Therefore, the research on the waterproof coating can solve the problem of limitation of adhesive force in the existing waterproof coating, and has great significance for popularization and application of the waterproof coating for the metal roof steel structure.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The first purpose of the invention is to provide a waterproof coating for a metal roof steel structure, the waterproof coating takes vinyl acetate-ethylene copolymer emulsion as a base material and is doped with high-elasticity acrylic copolymer emulsion, the surface tension of the blended solution is lower, the adhesion and infiltration to the surface of the steel structure are facilitated, and the waterproof effect of the coating is improved.

The second purpose of the invention is to provide a preparation method of the waterproof coating for the metal roof steel structure, which is simple to operate, easy to obtain raw materials and low in cost.

In order to solve the technical problems, the invention provides a waterproof coating for a metal roof steel structure, which is mainly prepared from the following raw materials: by mass, 60-90 parts of vinyl acetate-ethylene copolymer emulsion, 30-50 parts of acrylic acid copolymer emulsion, 10-20 parts of nano material, 5-10 parts of pigment, 30-50 parts of filler, 1-5 parts of dispersant, 1-5 parts of defoaming agent, 6-9 parts of film-forming assistant and 8-16 parts of water.

The waterproof coating for the metal roof steel structure takes the vinyl acetate-ethylene copolymer emulsion as the base material and is doped with the high-elasticity acrylic copolymer emulsion, and the surface tension of the blended solution is lower, so that the adhesion and infiltration to the surface of the steel structure are facilitated, and the waterproof effect of the coating is improved. Furthermore, after the nano material is added on the basis, the coating has extremely high permeability, the nano material can permeate into the nano-size pore diameter of the metal roof steel structure and permeate into each pore, and then the pores are solidified and sealed.

Preferably, by mass, 70-80 parts of vinyl acetate-ethylene copolymer emulsion, 35-45 parts of acrylic acid copolymer emulsion, 12-18 parts of nano material, 6-9 parts of pigment, 35-45 parts of filler, 1-3 parts of dispersant, 1-3 parts of defoaming agent, 7-8 parts of film-forming assistant and 10-14 parts of water.

Preferably, the paint comprises, by mass, 75 parts of vinyl acetate-ethylene copolymer emulsion, 40 parts of acrylic acid copolymer emulsion, 15 parts of nano material, 7.5 parts of pigment, 40 parts of filler, 2.5 parts of dispersing agent, 2.5 parts of defoaming agent, 7.5 parts of film-forming assistant and 12 parts of water.

Preferably, the nano material is at least one of nano titanium oxide, nano silicon oxide or nano zinc oxide.

Preferably, the filler is prepared by mixing kaolin, diatomite and nano silica.

Preferably, the mass ratio of the kaolin, the diatomite and the nano silicon dioxide is (4-6): 2-4): 1-3.

In addition, the invention also provides a preparation method of the waterproof coating for the steel structure of the metal roof, which comprises the following steps:

(1) mixing the vinyl acetate-ethylene copolymer emulsion and the acrylic acid copolymer emulsion in proportion, and stirring uniformly to obtain a water-based emulsion;

(2) and (2) sequentially adding the nano material, the pigment, the filler, the dispersing agent, the defoaming agent, the film forming assistant and water into the water-based emulsion obtained in the step (1) according to a proportion, and then fully and uniformly stirring to obtain the waterproof coating for the metal roof and the steel structure.

Preferably, the filler is ground and then added to step (2).

Preferably, the stirring speed in the step (1) is 100-150r/min, and the stirring time is 1-2 h; the stirring speed in the step (2) is 200-250r/min, and the stirring time is 6-8 h.

Compared with the prior art, the invention has the beneficial effects that:

the waterproof coating for the metal roof steel structure takes the vinyl acetate-ethylene copolymer emulsion as the base material and is doped with the high-elasticity acrylic copolymer emulsion, and the surface tension of the blended solution is lower, so that the adhesion and infiltration to the surface of the steel structure are facilitated, and the waterproof effect of the coating is improved. Furthermore, after the nano material is added on the basis, the coating has extremely high permeability, the nano material can permeate into the nano-size pore diameter of the metal roof steel structure and permeate into each pore, and then the pores are solidified and sealed.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

Example 1

Firstly, weighing 14.1 parts of kaolin, 8.6 parts of diatomite and 7.3 parts of nano silicon dioxide, mixing and grinding to obtain a filler;

weighing 60 parts of vinyl acetate-ethylene copolymer emulsion and 30 parts of acrylic acid copolymer emulsion, mixing, stirring for 1h at the stirring speed of 100r/min to obtain water-based emulsion, sequentially adding 10 parts of nano titanium oxide, 5 parts of titanium dioxide, 30 parts of filler, 1 part of dispersant, 1 part of defoamer, 6 parts of film-forming assistant and 8 parts of water into the water-based emulsion, and stirring for 6h at the stirring speed of 200r/min to obtain the waterproof coating for the metal roof steel structure.

Example 2

Firstly, weighing 25 parts of kaolin, 12.5 parts of diatomite and 12.5 parts of nano silicon dioxide, mixing and grinding to obtain a filler;

weighing 90 parts of vinyl acetate-ethylene copolymer emulsion and 50 parts of acrylic acid copolymer emulsion, mixing, stirring for 2 hours at a stirring speed of 150r/min to obtain water-based emulsion, sequentially adding 20 parts of nano silicon oxide, 10 parts of carbon black, 50 parts of filler, 5 parts of dispersant, 5 parts of defoamer, 9 parts of film-forming assistant and 16 parts of water into the water-based emulsion, and stirring for 8 hours at a stirring speed of 250r/min to obtain the waterproof coating for the metal roof steel structure.

Example 3

Firstly, 21 parts of kaolin, 10.5 parts of diatomite and 8.5 parts of nano silicon dioxide are weighed, mixed and ground to obtain a filler;

weighing 75 parts of vinyl acetate-ethylene copolymer emulsion and 40 parts of acrylic acid copolymer emulsion, mixing, stirring for 1.5 hours at a stirring speed of 125r/min to obtain water-based emulsion, sequentially adding 15 parts of nano zinc oxide, 7 parts of titanium dioxide, 40 parts of filler, 5 parts of dispersant, 5 parts of defoamer, 9 parts of film-forming assistant and 16 parts of water into the water-based emulsion, and stirring for 7 hours at a stirring speed of 225r/min to obtain the waterproof coating for the steel structure of the metal roof.

Comparative example 1

The other steps are identical to those of example 3, except that no acrylic copolymer emulsion is added.

Comparative example 2

The other steps are identical to those of example 3, except that no nanomaterial is added.

Experimental example 1

The waterproof coatings of examples 1 to 3 and comparative examples 1 to 2 were evaluated for their performances, and the specific results are shown in table 1 below:

TABLE 1

As can be seen from Table 1, the overall performance of the waterproof coatings of examples 1-3 is significantly higher than that of comparative examples 1-2, and especially the performance index of example 3 achieves the best results. Therefore, the waterproof coating for the metal roof steel structure takes the vinyl acetate-ethylene copolymer emulsion as the base material and is doped with the high-elasticity acrylic copolymer emulsion, the surface tension of the blended solution is lower, the adhesion and infiltration to the surface of the steel structure are facilitated, and the waterproof effect of the coating is improved. Furthermore, after the nano material is added on the basis, the coating has extremely high permeability, the nano material can permeate into the nano-size pore diameter of the metal roof steel structure and permeate into each pore, and then the pores are solidified and sealed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or alterations do not depart from the essence of the corresponding technical solution.