Silica sol/polyacrylic ester emulsion with high silicon content and preparation method of silica sol/polyacrylic ester emulsion

A technology of polyacrylate emulsion and silica sol, which is applied in the direction of coating, etc., can solve the problems of poor compatibility and easy agglomeration, and achieve the effects of outstanding water resistance, high adhesion and reduced particle size

Active Publication Date: 2015-04-22
广东达尔新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsion not only overcomes the disadvantages of easy aggregation of nanomaterials and poor compatibility with organic substances, but also maintains the advantages of good film formation, film transparency and flexibility of traditional polymer emulsions, and also has outstanding water resistance and weather resistance. performance

Method used

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  • Silica sol/polyacrylic ester emulsion with high silicon content and preparation method of silica sol/polyacrylic ester emulsion
  • Silica sol/polyacrylic ester emulsion with high silicon content and preparation method of silica sol/polyacrylic ester emulsion
  • Silica sol/polyacrylic ester emulsion with high silicon content and preparation method of silica sol/polyacrylic ester emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Dissolve 0.18g of HEC into 5g of deionized water, then add the HEC solution to 56g of silica sol, and stir and react at 41°C for 12h to obtain modified silica sol.

[0044] 3.2g DNS-86 (allyloxy nonylphenol propanol polyoxyethylene (10) ether ammonium sulfate) and X-405 (octylphenol polyoxyethylene ether) compound emulsifier (mass ratio: 2:1) Dissolved in 38g deionized water to obtain an emulsified solution, which was divided into three parts: take 8g as the core monomer emulsifier solution, 25g as the shell monomer emulsifier solution, and mix the remaining emulsifier solution with the modified silica sol as the kettle liquid .

[0045] Monomer pre-emulsification: Add the core monomer emulsifier solution and the shell monomer emulsifier solution into two jars respectively, stir for 25min at a speed of 1500rpm, then drop 11g of the core monomer into the two bottles respectively ( The mass ratio of methyl methacrylate and butyl acrylate is 1:1) and 32.2g shell monomer (...

Embodiment 2

[0050] Dissolve 0.01 g of HEC into 5 g of deionized water, then add the HEC solution to 30 g of silica sol, and stir and react at 41° C. for 12 hours to obtain modified silica sol.

[0051] Dissolve 1.6g of DNS-86 and OP-10 (nonylphenol polyoxyethylene ether) composite emulsifier (mass ratio: 2:1) in 20g of deionized water, and divide it into three parts: take 3g as nucleomonomer emulsifier Solution; 11g is the core monomer emulsifier solution; the rest of the emulsifier solution is mixed with modified silica sol as the kettle liquid.

[0052] Monomer pre-emulsification: Add the core monomer emulsifier solution and the shell monomer emulsifier solution into two jars respectively, stir for 15 min at a speed of 1500 rpm, then drop 7g of the core monomer into the two bottles respectively ( The mass ratio of methyl methacrylate and butyl acrylate is 1:1) and 23g shell monomer (the mass ratio of methyl methacrylate, butyl acrylate, methacrylic acid and hydroxypropyl methacrylate is...

Embodiment 3

[0055] Dissolve 0.08g PEG (molecular weight 20,000, Guangdong Guanghua Chemical Factory Co., Ltd.) into 5g deionized water, then add the PEG solution to 25g silica sol, stir and react at 60°C for 10h to obtain modified silica sol.

[0056] Dissolve 3.5g of SVS (sodium vinyl sulfonate) and AEO40 (fatty alcohol polyoxyethylene ether emulsifier) ​​compound emulsifier (mass ratio: 1:4) in 25g of deionized water, and divide it into three parts: take 5g as the nucleus Monomer emulsifier solution, 15g is used as shell monomer emulsifier solution, and the remaining emulsifier solution is mixed with modified silica sol as kettle liquid.

[0057] Monomer pre-emulsification: Add the core monomer emulsifier solution and the shell monomer emulsifier solution into two jars respectively, stir for 10 min at a speed of 1500 rpm, then drop 7g of the core monomer (methyl methacrylate and The mass ratio of butyl acrylate is 1:1) and 23g shell monomer (the mass ratio of methyl methacrylate, butyl ...

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Abstract

The invention discloses silica sol / polyacrylic ester emulsion with high silicon content and a preparation method of the silica sol / polyacrylic ester emulsion. The method is characterized in that silica sol is physically modified by adopting water-soluble macromolecules, and the modified silica sol and acrylic ester monomer are subjected to in-situ polymerization to prepare the silica sol / polyacrylic ester emulsion. The formula of the silica sol / polyacrylic ester emulsion comprises the following raw materials in parts by weight: 50 to 70 parts of deionized water, 5 to 30 parts of silica sol, 0.01 to 0.5 part of water-soluble macromolecules, 20 to 53 parts of acrylic ester monomer, 1 to 5 parts of methacrylic acid or acrylic acid, 1 to 5 parts of emulsifier, 0.1 to 0.5 part of initiator and 0.1 to 0.5 part of pH buffering agent; accounting by SiO2, silicon content in the emulsion accounts for 5 to 30 percent of the entire solid content; the particle size of the emulsion particle is 60 to 100 nm; and the carboxyl and hydroxyl on a polymer molecular chain and the hydroxyl on the surface of the SiO2 particles can generate the cross-linking esterification, so that the hardness of the film can reach more than 5H, and the water resistance and weather resistance are prominent.

Description

technical field [0001] The invention relates to a polyacrylate composite polymer emulsion, in particular to a high-silicon-content silica sol / polyacrylate emulsion and a preparation method thereof. technical background [0002] In recent years, based on the development of emulsion polymerization theory and technology, composite polymer emulsions have emerged, especially organic-inorganic composite emulsions, which have attracted widespread attention. [0003] Since Okubo proposed the concept of "particle design" in the 1980s, a new type of polymer emulsion with heterogeneous (core-shell) structure latex particles has been prepared by using the seed emulsion polymerization method. Since there may be grafting, interpenetrating network or ionic bonding between the core and the shell of the core-shell structure latex particles, in the case of the same raw material composition, the latex particles with this structure can not only significantly improve the wear resistance of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/28C08F2/26C08F2/30C08K9/04C08K3/36C09D133/12C09D7/12
Inventor 文秀芳皮鹏皮丕辉蔡智奇徐守萍程江
Owner 广东达尔新型材料有限公司
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