Low-temperature-resistant polymer cement waterproof coating and preparation method thereof

A waterproof coating and polymer technology, applied in the direction of coating, etc., can solve the problems of poor stability in use and poor low temperature resistance of cured coating films, so as to improve the stability of low temperature use, good low temperature storage stability, and reduce low temperature The effect of the likelihood of cracking

Active Publication Date: 2021-09-24
冠翔技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor low-temperature storage and use stability of polymer cement waterproof coatings and poor low-temperature resistance of cured coating films, the application provides a low-temperature resistant polymer cement waterproof coating and its preparation method

Method used

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  • Low-temperature-resistant polymer cement waterproof coating and preparation method thereof
  • Low-temperature-resistant polymer cement waterproof coating and preparation method thereof
  • Low-temperature-resistant polymer cement waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0044] A modified polyacrylate emulsion is prepared according to the following preparation method:

[0045]S1. Weigh 0.2kg of emulsifier OP-10 and dissolve it in 9.8kg of deionized water, stir and mix at a speed of 600rpm, and prepare an emulsion;

[0046] Weigh 3.3kg hydroxyethyl methacrylate, 3.3kg methacrylate, 1.1kg methacrylic acid and 1.1kg3-glycidyloxypropyltrimethoxysilane;

[0047] Take 0.3kg of hydroxyethyl methacrylate, 0.3kg of methacrylate, 0.1kg of methacrylic acid and 0.1kg of 3-glycidyloxypropyltrimethoxysilane into the emulsion, stir and mix at a speed of 600rpm Carry out emulsification to obtain a pre-emulsion; add 0.1kg of potassium persulfate solution with a concentration of 0.01wt% to the pre-emulsion, stir at a speed of 600rpm and heat up to 75°C, then keep warm for 0.3h to obtain a seed emulsion;

[0048] S2. Raise the temperature of the seed emulsion to 80°C, then put the remaining hydroxyethyl methacrylate, methacrylate, methacrylic acid and 3-glycidy...

preparation example 2-10

[0050] A modified polyacrylate emulsion, the difference from Preparation Example 1 is that hydroxyethyl methacrylate, methacrylate, methacrylic acid, 3-glycidyloxypropyltrimethoxysilane and emulsifier The dosing amount is different, and the specific dosing amount is shown in Table 2 below.

[0051] Table 2. The dosage of each component of the modified polyacrylate emulsion in each step

[0052]

[0053]

preparation example 11

[0055] A modified polyacrylate emulsion, the difference from Preparation Example 9 is that 1,3-diglycidyl etheroxypropyl-1,1,3,3 tetramethyldisiloxane is used to replace 3 - glycidyloxypropyltrimethoxysilane.

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Abstract

The invention discloses a low-temperature-resistant polymer cement waterproof coating which comprises a liquid material and a powder material, and the liquid material and the powder material are compounded according to the weight ratio of (0.8-1.5):1. The liquid material comprises the following components in parts by weight: 70-90 parts of modified polyacrylate emulsion, 0-5 parts of water, 3-6 parts of triethanolamine and 1-5 parts of a defoaming agent; the powder material comprises the following components in parts by weight: 40-60 parts of cement, 10-15 parts of quartz powder, 10-15 parts of heavy calcium powder and 1-5 parts of diisocyanate; and the modified polyacrylate emulsion is prepared from acrylate monomers containing hydroxyl groups, siloxane containing epoxy groups and methacrylic acid through adoption of a seed emulsion polymerization method. The polymer cement waterproof coating prepared by the invention has relatively good low-temperature storage and use stability, and meanwhile, a coating film formed after curing is good in low-temperature resistance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a low-temperature-resistant polymer cement waterproof coating and a preparation method thereof. Background technique [0002] Polymer cement waterproof coating, also known as JS waterproof coating, is a two-component waterproof coating compounded by a reasonable ratio of liquid and powder. Among them, the liquid material generally chooses polymer emulsion such as polypropionate emulsion or ethylene-vinyl acetate copolymer emulsion, and the powder material generally uses cement as the main component. Polymer cement waterproof coating has the characteristics of high elasticity of synthetic polymer materials and good durability of inorganic materials. [0003] The polymer cement waterproof coating is constructed after mixing and mixing on site. It solidifies into a film through the mechanism of cement hydration or water volatilization. Therefore, the liquid material contains a lar...

Claims

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Application Information

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IPC IPC(8): C09D133/14C09D7/63C09D7/61
CPCC09D133/14C09D7/63C09D7/61C08K2003/265C08K5/29C08K5/17C08K3/36C08K3/26
Inventor 景肖波
Owner 冠翔技术集团有限公司
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