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Polymer cement waterproof coating and preparation method thereof

A waterproof coating and polymer technology, applied in the field of waterproof coatings, can solve the problems of shortened service life of polymer cement waterproof coatings, attenuation of elongation at break of polymer waterproof coatings, and poor ability to bridge cracks, etc., to improve load stability. performance, improved acid resistance, and improved low temperature performance

Inactive Publication Date: 2021-01-05
东联新南方科技(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing polymer cement waterproof coating has the following defects: 1. Styrene-acrylic emulsion uses water as the dispersion medium, and freezing of water at low temperature easily causes demulsification and coagulation of styrene-acrylic latex particles, and because of the existence of inorganic gelling materials, polymerization The physical cement waterproof coating has a certain strength, and cannot have good ductility and low temperature resistance like the polymer water emulsion building waterproof coating (acrylic waterproof coating). In the severe cold environment, the elongation at break of the polymer waterproof coating is sharp Attenuation, and the ability to bridge cracks becomes poor. Once the foundation is deformed, the waterproof layer is easy to crack; 2. Because the powder is generally used as the main cementitious material, Portland cement is mixed with heavy calcium carbonate, quartz powder and other fillers. , these raw materials all have good alkali resistance, but because the cement component contains a large amount of calcium silicate, calcium aluminate, calcium oxide, iron oxide, etc., and the filler component contains calcium carbonate, hydroxide, etc., both are extremely Easily reacts with acid to generate gas
At present, domestic water often contains carbonic acid, acetic acid, oxalic acid, hydrochloric acid (toilet cleaner), etc., and industrial water contains sulfuric acid and other components. The erosion of these acidic substances will cause deformation, bubbles, and shedding of the waterproof coating, resulting in polymer cement. The service life of waterproof coating is shortened or invalid

Method used

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  • Polymer cement waterproof coating and preparation method thereof
  • Polymer cement waterproof coating and preparation method thereof
  • Polymer cement waterproof coating and preparation method thereof

Examples

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Effect test

preparation example 1

[0040] Preparation Example 1: (1) Add stearic acid to the nano-calcium carbonate suspension after azeotropic distillation, make the temperature 85°C, stir for 40min, cool, vacuumize, and dry to constant weight at 100°C to obtain Modified nano-calcium carbonate, the mass ratio of stearic acid and nano-calcium carbonate suspension is 1:3; during azeotropic distillation, water and n-butanol and nano-calcium carbonate are boiled together, the mass ratio of water, n-butanol and your calcium carbonate The temperature is 1:1:0.6, and the temperature is gradually raised to 117°C;

[0041] (2) Add graphite to concentrated sulfuric acid, add sodium nitrate, stir and react at 80°C, add potassium permanganate, react at 30°C for 4h, adjust the pH to 7 with 30% sodium hydroxide, and ultrasonically 1h obtained graphene oxide solution, filtered and dried to obtain graphene oxide, the mass ratio of graphite, concentrated sulfuric acid, sodium nitrate and potassium permanganate was 1:1.3:0.6:0....

preparation example 2

[0043] Preparation Example 2: (1) Add stearic acid to the nano-calcium carbonate suspension after azeotropic distillation, make the temperature 88°C, stir for 35min, cool, vacuumize, and dry to constant weight at 103°C to obtain Modified nano-calcium carbonate, the mass ratio of stearic acid and nano-calcium carbonate suspension is 1:4; during azeotropic distillation, water and n-butanol and nano-calcium carbonate are boiled together, the mass ratio of water, n-butanol and your calcium carbonate The temperature is 1:1:0.7, and the temperature is gradually raised to 118°C;

[0044] (2) Add graphite to concentrated sulfuric acid, add sodium nitrate, stir the reaction at 85°C, add potassium permanganate, react at 33°C for 3h, adjust the pH to 7 with 30% sodium hydroxide, and ultrasonically 1.5h obtain graphene oxide solution, filter, dry, obtain graphene oxide, the mass ratio of graphite, concentrated sulfuric acid, sodium nitrate and potassium permanganate is 1:1.4:0.7:0.9;

[...

preparation example 3

[0046] Preparation Example 3: (1) Add stearic acid to the nano-calcium carbonate suspension after azeotropic distillation, make the temperature 90°C, stir for 30min, cool, vacuumize, and dry to constant weight at 105°C to obtain Modified nano-calcium carbonate, the mass ratio of stearic acid and nano-calcium carbonate suspension is 1:5; during azeotropic distillation, water and n-butanol and nano-calcium carbonate are boiled together, the mass ratio of water, n-butanol and your calcium carbonate 1:1:0.8, gradually increase the temperature to 120°C;

[0047] (2) Add graphite to concentrated sulfuric acid, add sodium nitrate, stir the reaction at 90°C, add potassium permanganate, react at 35°C for 2h, adjust the pH to 7 with 30% sodium hydroxide, and ultrasonically 2h obtained graphene oxide solution, filtered and dried to obtain graphene oxide, the mass ratio of graphite, concentrated sulfuric acid, sodium nitrate and potassium permanganate was 1:1.5:0.8:1;

[0048] (3) Heat g...

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Abstract

The invention discloses a polymer cement waterproof coating and a preparation method thereof. The polymer cement waterproof coating is prepared from a liquid material and a powder material, and the mass ratio of the liquid material to the powder material is 1: (2.5-3); the liquid material is prepared from the following components in parts by weight: 100-125 parts of modified styrene-acrylic emulsion, 0.1-1.5 parts of an antibacterial agent, 125-150 parts of water, 1-3 parts of a thickening agent and 3-6 parts of a film-forming agent; and the powder material comprises the following components in parts by weight: 225-250 parts of Portland cement, 225-250 parts of coarse whiting, 320-340 parts of quartz sand, 1-3 parts of a high-efficiency water reducing agent, 1-2 parts of a wetting dispersant and 25-40 parts of graphene oxide. The polymer cement waterproof coating has the advantages of being good in low-temperature flexibility, high in low-temperature bridging capacity, good in acid corrosion resistance, high in antibacterial rate and capable of capturing formaldehyde and purifying air.

Description

technical field [0001] The invention relates to the technical field of waterproof coatings, more specifically, it relates to a polymer cement waterproof coating and a preparation method thereof. Background technique [0002] Polymer cement waterproof coating is made of polymer emulsion such as acrylate, ethylene-vinyl acetate and cement as the main raw materials, and is prepared by adding fillers and other additives. It is a two-component film that is cured by water volatilization and cement hydration Water-based waterproof coating. Due to the simple construction, the extensibility and compactness of the polymer coating film, the high strength of the hydraulic cementitious material, and the advantages of being easy to bond with the wet base, the ratio of polymer emulsion to cement can be adjusted to meet different engineering environments. In recent years It is widely used in water-based waterproof coating products. [0003] Polymer cement waterproof coating is divided int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C08F212/08C08F220/14C08F220/18C08F220/06C08F220/20C08F220/58C08F2/26C04B111/27C04B111/23
CPCC04B28/04C08F212/08C08F220/18C08F2/26C04B2111/27C04B2111/00482C04B2111/23C04B2201/50C04B14/28C04B14/06C04B2103/302C04B2103/408C04B14/024C04B24/2676C04B2103/69C04B2103/44C04B24/08C04B24/023C04B24/06
Inventor 洪丽萍
Owner 东联新南方科技(北京)有限公司
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