阅读说明：本技术 一种高效快速堵漏防水涂料及其制备方法 (Efficient and rapid leaking stoppage waterproof coating and preparation method thereof ) 是由 隋子涛 隋福胜 隋恒松 随超凡 于 2020-07-04 设计创作，主要内容包括：本发明提供一种高效快速堵漏防水涂料并提供了其制备方法,该堵漏防水涂料的原材料组成包括：水泥、聚氨酯预聚物、聚合物胶乳、交联剂、改性膨胀珍珠岩、中空玻璃纤维、硬脂酸镁、无水氯化石蜡、促凝剂；本发明通过添加特制的改性膨胀珍珠岩增强吸水性同时增大材料膨胀率,减轻涂层密度,同时添加聚氨酯预聚物、交联聚合物胶乳以及玻璃纤维等增强涂料的力学强度以及抗渗透性,最终制得的堵漏防水涂料,不仅可实现快速堵漏,瞬间止水,还具有优异的粘结强度,防水抗渗性高,是一种高效快速的堵漏防水涂料。(The invention provides a high-efficiency rapid leaking stoppage waterproof coating and a preparation method thereof, and the leaking stoppage waterproof coating comprises the following raw materials: cement, polyurethane prepolymer, polymer latex, a cross-linking agent, modified expanded perlite, hollow glass fiber, magnesium stearate, anhydrous chlorinated paraffin and a coagulant; according to the invention, the specially-made modified expanded perlite is added to enhance the water absorption and increase the expansion rate of the material, so that the density of the coating is reduced, and the mechanical strength and the impermeability of the polyurethane prepolymer, the cross-linked polymer latex, the glass fiber and other reinforced coatings are added, so that the finally-prepared plugging waterproof coating can realize quick plugging and instant water stopping, has excellent bonding strength and high waterproof impermeability, and is an efficient and quick plugging waterproof coating.)

1. The efficient and rapid leaking stoppage waterproof coating is characterized by comprising the following raw materials in parts by weight:

60-80 parts of cement, 5-10 parts of polyurethane prepolymer, 5-8 parts of polymer latex, 0.1-0.5 part of cross-linking agent, 5-8 parts of modified expanded perlite, 3-6 parts of hollow glass fiber, 0.5-2 parts of magnesium stearate, 2-6 parts of anhydrous chlorinated paraffin and 2-5 parts of coagulant.

2. The plugging waterproof coating material as claimed in claim 1, wherein the mass content of-NCO group in the polyurethane prepolymer is 10-15 wt%; the density of the modified expanded perlite is 0.18-0.25g/cm 3.

3. The plugging waterproof paint as claimed in claim 1, wherein the modified expanded perlite is prepared by the following steps:

1) mechanically crushing perlite ore into particles of 0.1-0.5mm, and adding concentrated sulfuric acid solution into the perlite for acid washing and capacity expansion;

2) transferring the perlite after acid washing into a furnace at the temperature of 1000-1100 ℃ for roasting, grinding and crushing, and sieving by a sieve of 100-200 meshes to obtain expanded perlite powder;

3) adding the expanded perlite powder into a DMF solution, adding an accelerant, then adding nano SiO2 aerogel, performing ultrasonic dispersion, wherein the ultrasonic frequency is 55-60KHz, the treatment time is 1-2h, and then filtering and drying to obtain the modified expanded perlite.

4. The plugging waterproof coating material as claimed in claim 3, wherein the nano SiO2 aerogel is added in an amount of 0.03% by weight of the expanded perlite powder.

5. The plugging waterproof coating material as claimed in claim 3, wherein the accelerator comprises sodium carboxymethylcellulose and a coupling agent KH-550, and the mass ratio of the sodium carboxymethylcellulose to the coupling agent KH-550 is 2-2.5: 1.

6. The plugging waterproof coating material as claimed in claim 1, wherein the polyurethane prepolymer is prepared from MDI-50, polyoxypropylene diol N220 and phosphoric acid, and the weight ratio of MDI-50 to N220 is 1.7-2.0; the amount of phosphoric acid added is 0.1-0.2% by weight of polyoxypropylene glycol.

7. The plugging waterproof coating material according to claim 1, wherein the cement is one or more of cement No. 52.5, cement No. 62.5 and cement No. 62.5R.

8. The plugging waterproof coating material as claimed in claim 1, wherein the polymer latex is acrylic latex, and specifically comprises: one or more of water-based carboxyl neoprene latex, acrylic latex and styrene-acrylic latex.

9. The plugging waterproof coating material according to claim 1, wherein the crosslinking agent is one or more of a metal oxide, a peroxide and an amine crosslinking agent.

10. The plugging waterproof coating material as claimed in claim 1, wherein the coagulant is one or more of zinc oxide, sodium silicate and sodium aluminate.

Technical Field

The invention belongs to the technical field of plugging waterproof coatings, and particularly relates to an efficient and rapid plugging waterproof coating and a preparation method thereof.

Background

On the surface of the building, a layer of film is formed through volatilization of solvent or moisture or chemical reaction of two components, so that the surface of the building is isolated from water, and the waterproof and sealing effects are achieved. The leakage is easy to occur in military engineering, mechanical pits, tunnels, swimming pools, water pools, basements and water supply pipe drainage and irrigation gates, and roof, toilet, balcony and pipeline interfaces, the common waterproof coating can be solidified after a period of time, and rapid seepage-proofing and leakage-repairing and emergency repair cannot be realized, so that the leakage-stopping waterproof coating is produced at the right moment.

The invention patent CN108707350A provides a graphene waterproof plugging coating, which comprises high-grade cement, water washing river sand, acrylic latex powder, a graphene nanosheet, wood fibers and a water reducing agent, wherein the graphene nanosheet is connected with polymer molecules of the acrylic latex powder, so that the crosslinking degree of the polymer molecules of the acrylic latex powder can be increased, and the bonding strength of the acrylic latex powder can be improved.

Disclosure of Invention

In order to solve the problems in the prior art and further optimize the prior process, the invention provides the high-efficiency quick plugging waterproof coating and the preparation method thereof, so as to achieve the purposes of quickly plugging and instantly stopping water, simultaneously improving the expansion rate of materials and reducing the density of a coating.

In order to solve the technical problems, the invention adopts the following technical scheme:

the efficient and rapid leaking stoppage waterproof coating is characterized by comprising the following raw materials in parts by weight:

60-80 parts of cement, 5-10 parts of polyurethane prepolymer, 5-8 parts of polymer latex, 0.1-0.5 part of cross-linking agent, 5-8 parts of modified expanded perlite, 3-6 parts of hollow glass fiber, 0.5-2 parts of magnesium stearate, 2-6 parts of anhydrous chlorinated paraffin and 2-5 parts of coagulant;

the density of the modified expanded perlite is 0.18-0.25g/cm 3;

the preparation process of the modified expanded perlite comprises the following steps:

1) mechanically crushing perlite ore into particles of 0.1-0.5mm, and adding concentrated sulfuric acid solution into the perlite for acid washing and capacity expansion;

2) transferring the perlite after acid washing into a furnace at the temperature of 1000-1100 ℃ for roasting, grinding and crushing, and sieving by a sieve of 100-200 meshes to obtain expanded perlite powder;

3) adding expanded perlite powder into a DMF solution, adding an accelerant, then adding nano SiO2 aerogel, performing ultrasonic dispersion, wherein the ultrasonic frequency is 55-60KHz, the treatment time is 1-2h, and then filtering and drying to obtain modified expanded perlite;

the addition amount of the nano SiO2 aerogel accounts for 0.03-0.05% of the weight of the expanded perlite powder;

the accelerant comprises sodium carboxymethyl cellulose and a coupling agent KH-550, wherein the mass ratio of the sodium carboxymethyl cellulose to the coupling agent KH-550 is 2-2.5: 1;

the preparation method of the polyurethane prepolymer comprises the following steps:

carrying out vacuum dehydration on polyoxypropylene diol N220 until the water content is within 0.1%; introducing nitrogen to remove air in the reaction kettle at normal pressure, adding MDI-50 and a small amount of phosphoric acid under the protection of nitrogen atmosphere, raising the temperature to 80 ℃ for reaction for 4-5 hours, then defoaming for 1 hour under the micro-vacuum condition, and cooling to obtain a polyurethane prepolymer;

wherein the weight ratio of MDI-50 to N220 is 1.7-2.0;

the adding amount of the phosphoric acid is 0.1-0.2% of the weight of the polyoxypropylene diol;

the mass content of-NCO group in the polyurethane prepolymer is 10-15 wt%;

the cement is one or more of No. 52.5 cement, No. 62.5 cement and No. 62.5R cement;

the polymer latex is acrylic latex, and specifically comprises: one or more of water-based carboxyl neoprene latex, acrylic latex and styrene-acrylic latex;

the cross-linking agent is one or more of metal oxide, peroxide and amine cross-linking agent;

the coagulant is one or more of zinc oxide, sodium silicate and sodium aluminate;

the preparation method of the high-efficiency quick plugging waterproof coating comprises the following steps:

firstly, weighing modified expanded perlite, hollow glass fiber, magnesium stearate and anhydrous chlorinated paraffin according to weight, and dry-mixing by using a ball mill to obtain mixed powder;

then adding the cement, the polyurethane prepolymer, the modified polymer latex, the coagulant and the mixed powder into a sand mill, adding a small amount of water, and continuously sanding for 30-50 minutes to obtain slurry;

the water adding amount is controlled to be 5-10%.

By adopting the technical scheme, the invention has the beneficial effects that:

1. the plugging waterproof coating prepared by the method has short curing time, the setting time is 3-4min, quick plugging can be realized, water can be instantly absorbed and stopped, and complete curing can be realized within 12 h;

2. according to the plugging waterproof coating prepared by the invention, the modified expanded perlite component is added into the coating, so that the coating not only has water absorption, but also has countless pores filled in an expansion body, and the dried plugging coating has the density of 0.9-1.01g/cm3, small density and light weight;

3. the leaking stoppage waterproof coating prepared by the invention is prepared by compounding the polyurethane prepolymer, the cross-linked polymer latex and the glass fiber, so that the strength is greatly enhanced, the bonding strength reaches 5.9-6.3MPa, and the compressive strength reaches 58-60 MPa;

4. the plugging waterproof coating prepared by the invention has excellent waterproof and anti-permeability properties, the water permeation phenomenon does not occur for 4 hours under the water pressure of 0.6MPa, and the maximum anti-permeability pressure can reach 2.5-2.8 MPa.

The specific implementation mode is as follows:

the invention is further illustrated below with reference to specific examples.