Preparation method of organosilicon polyacrylate-based gypsum composite waterproofing agent

A technology of silicon polyacrylate and polyacrylate emulsion, which is applied in the field of preparation of silicone polyacrylate-based gypsum composite waterproofing agent, can solve the problems of reducing the mechanical strength of gypsum boards, and achieve the effect of improving mechanical strength and waterproof performance

Inactive Publication Date: 2021-04-06
成都含蓬娄环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at the problem that most of the existing waterproof materials for gypsum are inorganic materials, and there is a problem of reducing the mechanical strength of gypsum boards, a method for preparing a silicone polyacrylate-based gypsum composite waterproofing agent is provided

Method used

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Examples

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Effect test

preparation example Construction

[0032] The preparation method of described modified polyparaffin wax emulsion is:

[0033] (1) In parts by weight, weigh 8-10 parts of solid paraffin, 3-5 parts of sodium stearate, and 15-20 parts of water into the emulsification tank, and heat up to 55°C-75°C to completely dissolve the paraffin Finally, under the low-speed stirring condition of 300-500r / min, add 3-5 parts of epichlorohydrin, continue to heat up to 80-85°C, add 0.1-0.2 parts of ammonium persulfate, and keep stirring at 1500-3000r / min 45-55 minutes;

[0034] (2) When the above product is cooled to 55-75°C, slowly add 4-6 parts by weight of ammonia water into the emulsification tank filled with the reaction product of step (2), and stir at a stirring speed of 2000-3000r / min , until the ammonia water is added; (3) After the ammonia water is added, continue the heat preservation reaction for 10-20 minutes, cool, and discharge when the temperature drops to 35-45°C to prepare a modified polyparaffin wax emulsion.

Embodiment 1

[0036] In parts by weight, weigh 30 parts of hydroxy silicone oil, 30 parts of n-octyltriethoxysilane, 20 parts of acrylic acid, 20 parts of methyl methacrylate, 20 parts of ethyl methacrylate, 4 parts of octylphenol Oxyethylene ether, 0.4 parts of ammonium persulfate, 60 parts of deionized water, add octylphenol polyoxyethylene ether to deionized water, stir at 180r / min for 12min at room temperature, and obtain emulsifier liquid, mix acrylic acid and methacrylic acid Add methyl ester and ethyl methacrylate to 2 / 3 mass of the emulsifier solution, stir at 200r / min for 10min in a water bath at 40°C, keep warm to obtain a pre-emulsion, and mix the remaining 1 / 3 mass of the emulsifier solution Slowly add to the pre-emulsion at a dropping rate of 30mL / min, stir for 20min at a speed of 240r / min in a water bath at 40°C to obtain an emulsion, add hydroxyl silicone oil, n-octyltriethoxysilane, and ammonium persulfate In the emulsion, stir at 300r / min for 2 hours in a water bath at 80°C...

Embodiment 2

[0042] In parts by weight, weigh 35 parts of hydroxy silicone oil, 35 parts of n-octyltriethoxysilane, 25 parts of acrylic acid, 22 parts of methyl methacrylate, 22 parts of ethyl methacrylate, 5 parts of octylphenol Oxyethylene ether, 0.6 parts of ammonium persulfate, 70 parts of deionized water, octylphenol polyoxyethylene ether was added to deionized water, and stirred at 180r / min for 14min at room temperature to obtain an emulsifier liquid, and acrylic acid, methacrylic acid Add methyl ester and ethyl methacrylate to 2 / 3 mass of the emulsifier solution, stir at 220r / min for 11min in a water bath at 50°C, keep warm to obtain a pre-emulsion, and mix the remaining 1 / 3 mass of the emulsifier solution Slowly add to the pre-emulsion at a dropping rate of 35mL / min, stir for 25min at a speed of 260r / min in a water bath at 50°C to obtain an emulsion, add hydroxyl silicone oil, n-octyltriethoxysilane, and ammonium persulfate In the emulsion, stir at 325r / min for 3 hours in a water b...

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Abstract

The invention relates to a preparation method of a polyacrylate-based gypsum composite waterproof agent, and belongs to the technical field of gypsum waterproof agents. The polyacrylate-based gypsum composite waterproof agent is prepared by taking the organic silicon modified polyacrylate emulsion as a matrix emulsion and adding the paraffin emulsion and the albolene, organic silicon molecules contain Si-O bonds and Si-C bonds, and the Si-O bonds are high in bond energy, large in molecular volume and low in density, so that the molecules are endowed with very high hydrophobicity, and the emulsion reacts with gypsum components, so that the contact angle between pore micropores in gypsum and water can be increased, the waterproofing performance of gypsum is improved, and molecules of paraffin emulsion and albolene can be cross-linked with organic silicon and polyacrylate, so that the strength of a gypsum product can be effectively improved, the film-forming property of a hydrophobic film is improved, and the waterproofing performance of the gypsum waterproofing agent is further improved.

Description

technical field [0001] The invention relates to a preparation method of a silicone polyacrylate-based gypsum composite waterproofing agent, belonging to the technical field of gypsum waterproofing agents. Background technique [0002] Gypsum is a traditional inorganic cementitious material with a long history of use. In today's society, gypsum cementitious materials are mainly used to produce non-load-bearing building wall materials and interior decoration materials. Gypsum building material products generally have excellent fire and flame retardancy, decoration, reprocessing, sound insulation and thermal insulation properties, and can adjust indoor air humidity. They are harmless to the human body and have become highly respected green and energy-saving building materials. Although gypsum building material products have a high degree of approval, they also have shortcomings such as low strength, poor waterproof and moisture-proof performance, large strength loss after bein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D7/63C09D7/65C08F283/12C08F220/06C08F220/14C08F220/18
CPCC08F283/122C08L2205/03C09D151/085C09D7/63C09D7/65C08L91/06C08L91/00C08K5/053C08F220/06C08F220/14C08F220/1802
Inventor 雷洪军
Owner 成都含蓬娄环保科技有限公司
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