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Waterproof gypsum-based caulking paste

A gypsum-based, gypsum technology, applied in the field of building materials, can solve the problems of non-waterproof, affecting construction quality and decorative aesthetics, joint deformation, etc., to improve waterproof performance, good adhesion, and prevent water absorption deformation Effect

Inactive Publication Date: 2020-07-14
GREENTOWN DECORATION ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problem that the gypsum-based caulking paste in the prior art is not waterproof, and the joints are easily deformed due to water absorption to crack and fall off after filling, which affects the construction quality and decorative aesthetics, and provides a waterproof gypsum Gypsum-based caulking paste, grafting silicone waterproofing agent on the binder in gypsum-based caulking paste, which greatly improves the hydrophobicity of gypsum-based caulking paste, can effectively prevent the intrusion of water, prevent cracking and falling off

Method used

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  • Waterproof gypsum-based caulking paste

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] A waterproof gypsum-based caulking paste, in parts by weight, the composition includes 900 parts of gypsum, 11 parts of bamboo fibers with a length of 15mm, 0.3 parts of sodium citrate, 3 parts of cellulose ether, 5 parts of redispersible latex powder, 1 Parts of starch ether, 4 parts of polydimethylsiloxane grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer and 500 parts of water.

[0033] The preparation method of the polydimethylsiloxane-grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer comprises the steps:

[0034] (1) Dissolve alkylphenol polyoxyethylene ether and sodium bicarbonate in water, stir until completely dissolved to obtain bottom liquid A, the mass ratio of alkylphenol polyoxyethylene ether, sodium bicarbonate and water is 4:1: 65;

[0035] (2) Dissolve the alkylphenol polyoxyethylene ether in water, the mass ratio of the alkylphenol polyoxyethylene ether and water to the mass ratio in step (1) is 1.5:1, stir u...

Embodiment 2

[0040]A waterproof gypsum-based caulking paste, in parts by weight, the composition includes 800 parts of gypsum, 10 parts of wood fibers with a length of 10mm, 5 parts of cotton fibers with a length of 10mm, 0.2 parts of sodium polyphosphate, and 2 parts of carboxymethyl Cellulose, 1 part of redispersible latex powder, 0.5 part of starch ether, 3 parts of polydimethylsiloxane-grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer and 400 parts of water.

[0041] The preparation method of the polydimethylsiloxane-grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer comprises the steps:

[0042] (1) Dissolve alkylphenol polyoxyethylene ether and sodium bicarbonate in water, stir until completely dissolved to obtain bottom liquid A, the mass ratio of alkylphenol polyoxyethylene ether, sodium bicarbonate and water is 2:1: 60;

[0043] (2) Dissolve the alkylphenol polyoxyethylene ether with the same quality as in step (1) in the water with the ...

Embodiment 3

[0048] A waterproof gypsum-based caulking paste, in parts by weight, the composition includes 1000 parts of gypsum, 10 parts of bamboo fibers with a length of 20mm, 0.5 parts of sodium citrate, 4 parts of polyacrylamide, 8 parts of redispersible latex powder, and 1.5 parts of Parts of starch ether, 5 parts of polydimethylsiloxane grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer and 800 parts of water.

[0049] The preparation method of the polydimethylsiloxane-grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer comprises the steps:

[0050] (1) Dissolve alkylphenol polyoxyethylene ether and sodium bicarbonate in water, stir until completely dissolved to obtain bottom liquid A, the mass ratio of alkylphenol polyoxyethylene ether, sodium bicarbonate and water is 6:1: 70;

[0051] (2) Dissolve the alkylphenol polyoxyethylene ether in water, the mass ratio of the alkylphenol polyoxyethylene ether and water to the mass ratio in step (1) i...

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Abstract

The invention relates to the technical field of building materials, and discloses a waterproof gypsum-based caulking paste. The caulking paste comprises the following components in parts by weight: 800-1000 parts of gypsum; 10 to 12 parts of short plant fibers with a length of 10 to 20 mm, 0.2 to 0.5 part of a retarder, 2 to 4 parts of a water-retaining agent, 1 to 8 parts of latex powder, 0.5 to1.5 parts of an anti-sagging agent, 3 to 5 parts of a polydimethylsiloxane grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer, and 400 to 800 parts of water. According to the invention, the polydimethylsiloxane grafted styrene-butyl acrylate-silane coupling agent emulsion copolymer is added into the gypsum-based caulking paste; the excellent cohesiveness of the styrene-butyl acrylate emulsion and the good hydrophobicity of the polydimethylsiloxane and the silane coupling agent are realized; the gypsum-based caulking paste has good adhesive force on the surface of the gypsum plaster board, is endowed with waterproofness, effectively prevents the gypsum-based caulking paste from absorbing water and deforming, and prolongs the service life of the gypsum-based caulking paste.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a waterproof gypsum-based caulking paste. Background technique [0002] Gypsum-based caulk is a kind of wall repair material mixed with gypsum as the main raw material and various additives, which is used for filling the gaps in building walls. Such as: filling of cement board, gypsum board, top board and nail holes, etc., as well as other parts that need caulking, have strong cohesive force, and are indispensable supporting products for interior decoration. [0003] The gypsum-based caulking paste in the prior art uses gypsum as the main raw material, and is prepared after adding auxiliary agents such as setting retarder, binder, and water-retaining agent. ", its announcement number CN107500701A, consists of the following components by mass percentage: heavy calcium powder 55% to 60%, ash calcium powder 5% to 8%, gypsum 30% to 35%, bentonite 1.0% to 1.7%, latex powde...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/42C08F283/12C08F212/08C08F220/18C08F230/08C04B103/65C04B111/27
CPCC04B24/42C04B28/14C04B2103/65C04B2111/00672C04B2111/27C08F283/12C08F212/08C08F230/08C04B18/26C04B24/06C04B24/383C04B2103/0057C04B18/24C04B22/16C04B24/2652C04B24/38
Inventor 王永根赖圣场朱快支铭铭徐小勇杨大平潘银徐廷博陈子豪
Owner GREENTOWN DECORATION ENG GRP CO LTD
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