阅读说明：本技术 一种自修复防水涂料及其制备方法 (Self-repairing waterproof coating and preparation method thereof ) 是由 洪杰 林威 潘喜良 于 2020-07-07 设计创作，主要内容包括：本发明涉及一种自修复的防水涂料,其特征在于：包含液料部分和粉料部分,液料部分和粉料部分的质量比为1:1-1.5,其中所述的液料部分按照以下重量份数比配制而成：水、自修复乳液、防腐剂、分散剂、润湿剂、消泡剂、抗冻剂、酞青蓝色浆。所述的粉料部分按照以下重量份数比配制而成：白水泥、重钙、钠基膨润土、膨胀剂、质感砂子、聚羧酸减水剂。本发明提供一种自修复防水涂料及其制备方法,在使用前,将液料部分和粉料部分混合均匀制备成的一种自修复防水涂料具有优异的拉伸强度和断裂伸长率,可达2.5MPa和180％以上,而且还有着优异的附着性、耐候性和耐水透气性,在适合的条件下能自我修复长达5mm,宽0.5mm的裂缝。(The invention relates to a self-repairing waterproof coating, which is characterized in that: the powder material comprises a liquid material part and a powder material part, wherein the mass ratio of the liquid material part to the powder material part is 1:1-1.5, and the liquid material part is prepared from the following components in parts by weight: water, self-repairing emulsion, preservative, dispersant, wetting agent, defoaming agent, antifreeze agent and phthalocyanine blue color paste. The powder part is prepared from the following components in parts by weight: white cement, heavy calcium carbonate, sodium bentonite, an expanding agent, texture sand and a polycarboxylic acid water reducing agent. The invention provides a self-repairing waterproof coating and a preparation method thereof, before use, the self-repairing waterproof coating prepared by uniformly mixing a liquid material part and a powder material part has excellent tensile strength and elongation at break which can reach more than 2.5MPa and 180 percent, and also has excellent adhesiveness, weather resistance and water-proof air permeability, and can self-repair cracks with the length of 5mm and the width of 0.5mm under a proper condition.)

1. A self-repairing waterproof coating is characterized in that: the powder material comprises a liquid material part and a powder material part, wherein the mass ratio of the liquid material part to the powder material part is 1:1-1.5, and the liquid material part is prepared from the following components in parts by weight:

liquid material:

the powder part is prepared from the following components in parts by weight: :

2. the self-repairing waterproof coating material of claim 1, which is characterized in that: the self-repairing emulsion is vinyl acetate-ethylene copolymer emulsion.

3. The self-repairing waterproof coating material of claim 1, which is characterized in that: the dispersant is one or more of sodium salt dispersant or ammonium salt dispersant which are combined according to any proportion.

4. The self-repairing waterproof coating material of claim 1, which is characterized in that: the wetting agent is one or more of nonionic surfactant or anionic surfactant which are combined according to any proportion.

5. The self-repairing waterproof coating material of claim 1, which is characterized in that: the defoaming agent is one or more of a mineral oil defoaming agent or an organic silicon defoaming agent which are combined according to any proportion.

6. The self-repairing waterproof coating material of claim 1, which is characterized in that: the antifreeze agent is propylene glycol.

7. The preparation method of the self-repairing waterproof coating as claimed in any one of claims 1 to 6, characterized in that:

the preparation method of the liquid material part comprises the following steps:

firstly, adding 5-8 parts of water and 40-50 parts of self-repairing emulsion into a first container in sequence, and then stirring for 3-5 minutes at the stirring speed of 400-;

secondly, keeping the rotating speed, sequentially adding 0.2-0.3 part of dispersing agent, 0.2-0.3 part of wetting agent and 0.3-0.5 part of defoaming agent, and stirring for 2-4 minutes;

thirdly, the rotating speed is increased to 500 plus 600r/min, 0.7 to 1.2 portions of antifreeze agent and 0.3 to 0.5 portion of phthalocyanine blue color paste are added and stirred for 3 to 5 minutes;

the preparation method of the powder part comprises the following steps:

sequentially adding 10-15 parts of white cement, 15-18 parts of heavy calcium carbonate and 5-8 parts of sodium bentonite into a second container, and stirring for 5-10 minutes at a stirring speed of 500-600 r/min;

and finally adding 15-20 parts of texture sand and 0.4-0.7 part of polycarboxylic acid water reducing agent into a second container, and stirring for 3-5 minutes at the stirring rate of 500-.

8. The preparation method of the self-repairing waterproof coating material as claimed in claim 7, characterized in that: when in use, the liquid material part and the powder material part are uniformly stirred according to the mass ratio of 1:1-1.5, thus obtaining the powder material.

Technical Field

The invention relates to the technical field of building coatings, in particular to a self-repairing waterproof coating and a preparation method thereof.

Background

The self-repairing waterproof coating has a self-repairing function, is a bright spot in the market, can attract numerous customers, open the market new place, the self-closing waterproof coating has good self-closing property, high safety, excellent cohesiveness and good stability, when a base surface cracks, the waterproof layer extends along with the base surface until the waterproof layer is broken and water leakage occurs, the self-repairing waterproof layer has a unique function, the waterproof layer can expand and simultaneously can generate chemical reaction to generate compound crystals which are attached to the water leakage position, and the water leakage point is automatically repaired.

Disclosure of Invention

The invention provides a self-repairing waterproof coating and a preparation method thereof, before use, the self-repairing waterproof coating prepared by uniformly mixing a liquid material part and a powder material part has excellent tensile strength and elongation at break which can reach more than 2.5MPa and 180 percent, and also has excellent adhesiveness, weather resistance and water-proof air permeability, and can self-repair cracks with the length of 5mm and the width of 0.5mm under a proper condition.

The technical scheme of the invention is as follows:

a self-repairing waterproof coating comprises a liquid material part and a powder material part, wherein the mass ratio of the liquid material part to the powder material part is 1:1-1.5, and the liquid material part and the powder material part are mixed and stirred together when in use; wherein the liquid material part is prepared according to the following weight part ratio:

liquid material:

the powder part is prepared from the following components in parts by weight: :

the two are mixed and stirred together when in use.

Further, the self-repairing emulsion is vinyl acetate-ethylene copolymer emulsion.

Further, the dispersant is one or more of sodium salt dispersant or ammonium salt dispersant according to any combination.

Further, the wetting agent is one or more of nonionic surfactant or anionic surfactant in combination according to any proportion.

Further, the defoaming agent is one or more of a mineral oil defoaming agent and an organic silicon defoaming agent which are combined according to any proportion.

Further, the antifreeze agent is propylene glycol.

A preparation method of a self-repairing waterproof coating comprises the following steps:

firstly, adding 5-8 parts of water and 40-50 parts of self-repairing emulsion into a first container in sequence, and then stirring for 3-5 minutes at a stirring speed of 400-;

secondly, keeping the rotating speed, sequentially adding 0.2-0.3 part of dispersing agent, 0.2-0.3 part of wetting agent and 0.3-0.5 part of defoaming agent, and stirring for 2-4 minutes;

thirdly, the rotating speed is increased to 500 plus 600r/min, 0.7 to 1.2 portions of antifreeze agent and 0.3 to 0.5 portion of phthalocyanine blue color paste are added and stirred for 3 to 5 minutes;

the preparation method of the powder part comprises the following steps:

sequentially adding 10-15 parts of white cement, 15-18 parts of heavy calcium carbonate and 5-8 parts of sodium bentonite into a second container, and stirring for 5-10 minutes at a stirring speed of 500-600 r/min;

finally adding 15-20 parts of texture sand and 0.4-0.7 part of polycarboxylic acid water reducing agent into the cylinder, stirring together, and stirring for 3-5 minutes at the stirring rate of 500 plus 600 r/min.

When in use, the liquid material part and the powder material part are uniformly stirred according to the mass ratio of 1:1-1.5, and the powder material is obtained.

The principle is as follows: the self-repairing VAE emulsion added into the powder has certain swelling property and leveling property, white cement is continuously hydrated under the condition that water pressure is continuously enhanced, the cement is gradually matched with the self-repairing emulsion through NSA expanding agent, the waterproof layer can generate swelling micro-deformation, elastic deformation and swelling are carried out on cracks with the width of 0.5mm and the length of 5mm, meanwhile, the sodium bentonite can generate chemical reaction when meeting water, compound crystals are generated and filled in the swelling deformation waterproof layer, and the waterproof layer is like chocolate bean biscuits, so that the water leakage point can be repaired, and the mechanism can be understood as the combination of chemical reaction type and volume expansion type.

Compared with the prior art, the self-repairing waterproof coating and the preparation method thereof have the following advantages: the self-repairing waterproof coating prepared by the invention has excellent tensile strength and elongation at break which can reach more than 2.5MPa and 180 percent, and also has excellent adhesiveness, weather resistance, water resistance and air permeability, and can self-repair cracks with the length of 5mm and the width of 0.5mm under proper conditions.

Drawings

FIG. 1 is a schematic diagram of the product of example 1 of the present invention after a notch of 5mm in length and 0.5mm in thickness is cut on the waterproof film for 0 hour during the experiment.

FIG. 2 is a schematic diagram of the product of example 1 of the present invention after 4 hours of the waterproof film having a notch 5mm long and a notch 0.5mm thick.

FIG. 3 is a schematic diagram of the product of example 1 of the present invention after 12 hours of the waterproof film cut 5mm long and 0.5mm thick during the experiment.

Detailed Description

The self-repairing emulsion in the following liquid components is 547ED-VAE type of Wake company, the preservative is R-S of Thor company, the wetting and dispersing agent is NS-95 and NS-96 of Keka company, the defoaming agent is 334 of Corning company, the environment-friendly type used as the antifreeze agent is FT-68 of Sudan dragon company, 363F of Shiming science and technology company used as the mill base of phthalocyanine blue, the white cement in the powder component is fawn cement, the sand is 120 meshes of white texture type of Yisankang company, the heavy calcium is 200 meshes of Sanyou group, the expansion agent is CSA type of Arctic bear company, the polycarboxylic acid water reducing agent is 540P type of Seca company, and the sodium bentonite is 300M type of .