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A kind of sealing primer emulsion for fresh cement and preparation method thereof

A technology for sealing primer and cement, applied in the direction of coating, can solve the problems of whitening, primer emulsion erosion, wall emulsion coating film foaming, etc., to ensure molecular chain structure, improve stability, and improve sealing performance Effect

Active Publication Date: 2019-06-28
上海巴德富实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the primer emulsion will also seal the moisture in the cement, and the continuous volatilization of moisture in the wall will not only cause continuous erosion of the primer emulsion, but also cause foaming in the wall emulsion coating film. , whitish phenomenon

Method used

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preparation example Construction

[0027] The preparation method of the sealing primer emulsion for fresh cement of the present invention may further comprise the steps:

[0028]a) Preparation of pre-emulsion A: At normal temperature and pressure, add 20-40% of the total mass of water and 10-20% of the total mass of emulsifier into a container with a stirrer, and slowly add benzene while stirring. 20-50% of the total mass of ethylene, 20-50% of the total mass of n-butyl acrylate, 20-50% of the total mass of isooctyl acrylate, 10-50% of the total mass of high-density cross-linking monomers and hydrophilic monomers 10-50% of the total body mass, then raise the container temperature to 80-85°C, and pre-emulsify for 10-30 minutes to obtain pre-emulsion A for later use;

[0029] b) Preparation of pre-emulsion B: under normal temperature and pressure, add 20-40% of the total mass of water and 10-20% of the total mass of emulsifier to the container with agitator, and slowly add the rest while stirring. Measure styren...

Embodiment 1

[0038] The sealing primer emulsion for fresh cement of the present invention comprises water, styrene, n-butyl acrylate, isooctyl acrylate, allyloxy hydroxypropyl sulfonate, trimethylolpropane, acrylic acid, ammonium persulfate, the above-mentioned composition The parts are calculated according to the number of parts by mass: 50 parts of water, 5 parts of styrene, 5 parts of n-butyl acrylate, 5 parts of isooctyl acrylate, 1 part of allyloxy hydroxypropyl sulfonate, 1 part of trimethylolpropane 1 part, 1 part of acrylic acid, 1 part of ammonium persulfate.

[0039] The preparation method of the sealing primer emulsion for fresh cement of the present invention may further comprise the steps:

[0040] a) Preparation of pre-emulsion A: At normal temperature and pressure, add 20% of the total mass of water and 10% of the total mass of emulsifier to a container with a stirrer, and slowly add 20% of the total mass of styrene while stirring. 20%, 20% of the total mass of n-butyl acry...

Embodiment 2

[0049] The sealing primer emulsion for fresh cement of the present invention comprises water, styrene, n-butyl acrylate, isooctyl acrylate, sodium allyloxy hydroxypropyl sulfonate, sodium vinyl sulfonate, methallyl hydroxypropyl sulfonic acid Sodium, trimethylolpropane, propoxylated glyceryl triacrylate, dipentaerythritol hexaacrylate, acrylic acid, methacrylic acid, acrylamide, methacrylamide, ammonium persulfate, potassium persulfate, sodium persulfate, the above ingredients In terms of parts by mass, they are: 50 parts of water, 20 parts of styrene, 20 parts of n-butyl acrylate, 20 parts of isooctyl acrylate, 1 part of sodium allyloxy hydroxypropyl sulfonate, and 2 parts of sodium vinyl sulfonate , 2 parts of sodium methallyl hydroxypropyl sulfonate, 1 part of trimethylolpropane, 2 parts of propoxylated glycerin triacrylate, 2 parts of dipentaerythritol hexaacrylate, 1 part of acrylic acid, 1 part of methacrylic acid, acrylamide 2 parts, 1 part of methacrylamide, 1 part of ...

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Abstract

A sealing primer emulsion for fresh cement comprises the following components in parts by mass: 50 parts of water, 5-20 parts of styrene, 5-20 parts of n-butyl acrylate, 5-20 parts of 2-ethylhexyl acrylate, 1-5 parts of an emulsifier, 1-5 parts of a high-density crosslinking monomer, 1-5 parts of a hydrophilic monomer and 1-5 parts of an initiator. The sealing primer emulsion for the fresh cement has excellent air permeability and closure.

Description

technical field [0001] The invention relates to the processing field of architectural coatings, in particular to a sealing primer emulsion for fresh cement that can seal a newly constructed wall and a preparation method thereof. Background technique [0002] With the continuous development of the economy and the gradual advancement of the urbanization process, there are more and more high-rise buildings in China, and the closure of the wall base of the building's outer wall has always been a technical difficulty in the construction industry. The hardening of cement is a complex chemical reaction process. As the cement hardens, silicate and calcium hydroxide will continue to appear on the wall. Therefore, a large amount of salt and alkali will adhere to the surface of the cement that has just hardened. At this time, if the primer is painted, pan-salt and pan-alkali will often appear on the paint film, resulting in blooming of the top coat. In order to solve this problem, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/18C08F216/14C08F220/06C08F228/02C08F222/20C08F220/56C08F2/26C09D125/14C09D133/08
CPCC08F2/26C08F212/08C08F220/18C08F220/1804C08F220/1808C09D125/14C09D133/08C08F216/1475C08F220/06C08F228/02C08F222/1006C08F220/56
Inventor 魏世辕罗云龚博文唐兵
Owner 上海巴德富实业有限公司
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