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Organic silicon modified acrylate emulsion and preparation method thereof

A kind of acrylate and acrylate technology, applied in the direction of coating, anti-corrosion coating, etc., can solve the problem that exterior wall coatings are difficult to meet the requirements of high-rise building outer coatings, water resistance cannot meet high-performance coatings, and coatings have a long curing and drying time and other problems to achieve the effect of avoiding unstable polymerization rate, shortening film forming time, and easy control of reaction temperature

Active Publication Date: 2021-01-22
湖北新蓝天新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present acrylic paint also has the following disadvantages: 1. The glass transition temperature of acrylic emulsion paint is high, curing and drying are slow, and phenomena such as cracks and cracks will appear in the coating as time goes by; 2. The water resistance of acrylic emulsion paint is poor , the prepared exterior wall coating is difficult to meet the requirements of high-rise building exterior coating
The invention patent with the patent publication number CN108359046 A discloses a preparation method of epoxy organosiloxane modified acrylic acid emulsion. The water resistance of the emulsion, the test shows that there is no whitening phenomenon after immersion in water at room temperature for 98 hours, but the curing and drying time of the paint is long
The invention patent with the patent publication number CN109868047 A discloses a methacryloxysilane modified acrylic coating, which can be cured at low temperature or room temperature, but the water resistance cannot meet the needs of high-performance coatings, and further improvement is needed

Method used

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  • Organic silicon modified acrylate emulsion and preparation method thereof
  • Organic silicon modified acrylate emulsion and preparation method thereof
  • Organic silicon modified acrylate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] S1: Weigh 30 grams of γ-methacryloyloxybutyl tripropropoxysilane, 40 grams of pentenyl tripropropoxysilane, 30 grams of ethyl acrylate, 80 grams of deionized water, dodecylsulfonic acid Sodium 1g, OP-101g, sodium bicarbonate 2g, tert-butyl hydroperoxide 0.5g;

[0047] S2: Add deionized water, sodium dodecylsulfonate, OP-10, sodium bicarbonate, and 1 / 3 of each monomer into a volumetric flask and stir, pre-emulsify at room temperature for 30 minutes, heat to 65°C, drop Add the initiator, and when the blue fluorescence appears in the system, add all the remaining monomers dropwise, react for 4 hours, then raise the temperature to 90°C and mature for 1 hour;

[0048] S3: stop the reaction and wait until the temperature of the system drops to room temperature, adjust the pH of the reaction solution to 7-8 with ammonia water, filter through a 500-mesh screen, and the obtained filtrate is the silicone-modified acrylate emulsion.

[0049] In this example, the silicone-modified...

Embodiment 2

[0053] S1: Weigh 50 grams of γ-methacryloyloxypentylmethyldipropoxysilane, 20 grams of pentenyl tripropoxysilane, 30 grams of ethyl acrylate, 90 grams of deionized water, dodecyl 2 grams of sodium sulfonate, 2 grams of OP-102, 3 grams of sodium bicarbonate, 0.5 grams of tert-butyl hydroperoxide;

[0054] S2: Add deionized water, sodium dodecylsulfonate, OP-10, sodium bicarbonate, and 1 / 3 of each monomer into a volumetric flask and stir, pre-emulsify at room temperature for 30 minutes, heat to 70°C, drop Add the initiator, and when the blue fluorescence appears in the system, add all the remaining monomers, react for 5 hours, then raise the temperature to 90°C and mature for 1 hour;

[0055] S3: stop the reaction and wait until the temperature of the system drops to room temperature, adjust the pH of the reaction solution to 7-8 with ammonia water, filter through a 500-mesh screen, and the obtained filtrate is the silicone-modified acrylate emulsion.

[0056] In this example, ...

Embodiment 3

[0060] S1: Weigh 60 grams of γ-methacryloyloxyheptylethylbutylpentyloxysilane, 10 grams of pentenyl tripropoxysilane, 30 grams of ethyl acrylate, 100 grams of deionized water, dodecane 3 grams of sodium sulfonate, 3 grams of OP-103, 4 grams of sodium bicarbonate, 0.6 grams of tert-butyl hydroperoxide;

[0061] S2: Add deionized water, sodium dodecylsulfonate, OP-10, sodium bicarbonate, and 1 / 3 of each monomer into a volumetric flask and stir, pre-emulsify at room temperature for 30 minutes, heat to 75°C, drop Add the initiator, and when blue fluorescence appears in the system, add all the remaining monomers, react for 6 hours, then raise the temperature to 90°C and mature for 1 hour;

[0062] S3: stop the reaction and wait until the temperature of the system drops to room temperature, adjust the pH of the reaction solution to 7-8 with ammonia water, filter through a 500-mesh screen, and the obtained filtrate is the silicone-modified acrylate emulsion.

[0063] In this example...

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Abstract

The invention discloses an organic silicon modified acrylate emulsion and a preparation method thereof. The preparation method comprises the steps of S1, adding deionized water, a compound emulsifier,a neutralizing reagent and one third of each monomer into a reaction flask to be stirred and pre-emulsified at the room temperature to obtain a pre-emulsified solution, wherein the monomer comprisesmethacryloyloxyalkyl silane, olefin silane and an acrylate compound; S2, heating the pre-emulsified solution to the temperature of 65-85 DEG C, dropwise adding an initiator, obtaining a seed emulsionwhen blue fluorescence appears in the system, adding all the remaining monomers, reacting for 4-6 hours, heating to the temperature of 90 DEG C, and curing for 1 hour; and S3, adjusting the pH value of the reaction solution to 7-8 by using ammonia water, and filtering by using a 500-mesh screen to obtain filtrate, namely, the organic silicon modified acrylate emulsion. The organic silicon modifiedacrylate polymer prepared by the invention has the advantages of short curing time of methacryloyloxyalkyl silane, excellent flexibility of olefin silane, good weather resistance and cohesiveness ofacrylate and the like.

Description

technical field [0001] The invention relates to the field of acrylate emulsion paints, in particular to an organosilicon-modified acrylate polymer, an organosilicon-modified acrylate emulsion paint and a preparation method thereof. Background technique [0002] In recent years, people's living standards have been continuously improved, and the construction industry has also developed rapidly, and the requirements for the performance of coatings are also getting higher and higher. Currently the most widely used acrylic emulsion paint is used in various aspects of the construction industry due to its good film-forming properties, good adhesion, low cost, simple production process, and good weather resistance. But at present acrylic paint also has the following disadvantages: 1. The glass transition temperature of acrylic emulsion paint is high, curing and drying are slow, and the coating will appear cracks and cracks as time goes by; 2. The water resistance of acrylic emulsion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F230/08C08F220/18C08F220/14C09D143/04C09D5/08
CPCC08F230/085C09D143/04C09D5/08C08F220/1802C08F220/1804C08F220/1803C08F220/14C08F220/1812C08F220/1808
Inventor 肖俊平冯琼华李胜杰王成
Owner 湖北新蓝天新材料股份有限公司
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