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Seed emulsion of opacifying polymer and preparation process

A technology for covering polymers and polymers, which is applied in the field of seed emulsions and preparation processes of covering polymers, can solve the problems of increasing the VOC content of emulsions, not conforming to the concept of environmental protection, and complicated preparation processes, and achieves increased coating uniformity and reduced Unstable glue or slag problems, the effect of low surface tension

Active Publication Date: 2022-03-18
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent uses oil phase polymerization. After the polymerization is completed, the oil is transferred to water and petroleum ether is extracted. Not only the preparation process is relatively complicated, but also the residual petroleum ether solvent will increase the VOC content in the emulsion, which does not conform to the international environmental protection concept

Method used

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  • Seed emulsion of opacifying polymer and preparation process
  • Seed emulsion of opacifying polymer and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Prepare the masking polymer seed emulsion raw material according to the following recipe:

[0056] 70g of deionized water,

[0057] Methyl methacrylate 20g,

[0058] Methacrylic acid 10g,

[0059] Solvay RHODAPEX TR / 2030-S 1.08g,

[0060] Ethylene glycol dimethacrylate 0.3g,

[0061] Vinyltrimethoxysilane 0.3g,

[0062] Evonik VISOMER Terra C13-MA 0.3g,

[0063] Ammonium persulfate 0.12g,

[0064] Clariant Emulsogen LCN407 0.05g,

[0065] Polyvinyl alcohol 0.01g.

[0066] Prepare the seed emulsion of covering polymer according to the following process:

[0067] 1) Prepare the pre-emulsion: Add 20g of deionized water and 1g of anionic emulsifier (Solvay RHODAPEXTR / 2030-S) into the pre-emulsification kettle under normal temperature and pressure to fully dissolve and mix, and add the formula in turn under stirring A certain amount of methyl methacrylate, methacrylic acid, crosslinking agent (ethylene glycol dimethacrylate), 350rpm high-frequency stirring 15min, ma...

Embodiment 2

[0076] Prepare the masking polymer seed emulsion raw material according to the following recipe:

[0077] 60g of deionized water,

[0078] Methyl methacrylate 22g,

[0079] Methacrylic acid 8g,

[0080] Clariant Emulsion EPA073 1.285g,

[0081] Allyl methacrylate 0.4g,

[0082] Vinyltriethoxysilane 0.1g,

[0083] BASF LMA1214F 0.4g,

[0084] Sodium persulfate 0.115g,

[0085] Solvay ABEX AP470-Z 0.08g,

[0086] Polyvinyl alcohol 0.04g.

[0087] Prepare the seed emulsion of covering polymer according to the following process:

[0088] 1) Prepare the pre-emulsion: under normal temperature and pressure, add 15g of deionized water and 1.2g of anionic emulsifier (Clariant Emulsion EPA073) into the pre-emulsion kettle to fully dissolve and mix. While stirring, add the formula amount of formazan in sequence methyl acrylate, methacrylic acid, crosslinking agent (allyl methacrylate), 350rpm high-frequency stirring for 25min, to make a pre-emulsion;

[0089] 2) Preparation of ...

Embodiment 3

[0097] Prepare the masking polymer seed emulsion raw material according to the following recipe:

[0098] 90g of deionized water,

[0099] Methyl methacrylate 18g,

[0100] methacrylic acid 12g,

[0101] Solvay ABEX 8018R 0.92g,

[0102] Trimethylolpropane trimethacrylate 0.2g,

[0103] γ-methacryloxypropyltrimethoxysilane 0.4g,

[0104] Evonik VISIOMER Terra C17.4-MA 0.2g,

[0105] Potassium persulfate 0.12g,

[0106] Clariant Emulsogen LCN407 0.03g,

[0107] Polyvinyl alcohol 0.07g.

[0108] Prepare the seed emulsion of covering polymer according to the following process:

[0109] 1) Prepare the pre-emulsion: under normal temperature and pressure, add 22g of deionized water and 0.8g of anionic emulsifier (Solvay ABEX8018R) into the pre-emulsification kettle to fully dissolve and mix, and add the formula amount of formazan in sequence under stirring methyl acrylate, methacrylic acid, crosslinking agent (trimethylolpropane trimethacrylate), 350rpm high-frequency stirr...

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Abstract

The seed emulsion is prepared from the following raw materials in parts by weight: 50 to 90 parts of deionized water, 15 to 25 parts of methyl methacrylate, 5 to 15 parts of methacrylic acid, 0.5 to 1.5 parts of anionic emulsifier, 0.1 to 0.5 part of cross-linking agent, 0.1 to 0.5 part of silane coupling agent, 0.1 to 0.5 part of acrylic acid long-chain alkyl ester and 0.08 to 0.16 part of initiator. 0.01 to 0.1 part of a nonionic emulsifier and 0.01 to 0.1 part of a stable polymer. The prepared seed emulsion has good particle size uniformity, structural stability, swelling property and hydrophobicity, the structural stability of the covering polymer hollow microspheres can be improved, and therefore the good covering performance of the covering polymer is guaranteed.

Description

technical field [0001] The invention relates to a seed emulsion and a preparation process, in particular to a covering polymer seed emulsion and a preparation process. Background technique [0002] Covering polymer is a non-film-forming aqueous acrylic emulsion polymer developed in the late 1970s and is generally blended with other self-forming acrylic emulsions. The covering polymer has a hollow microsphere structure, and its shell is a high glass transition temperature polymer composed of styrene / acrylic ester, with an average particle size of 400-600nm. Due to its unique hollow structure, the covering polymer utilizes the high light scattering power of the internal air to provide covering power, so that it can partially replace titanium dioxide, while reducing costs, it can also improve the scrub resistance and stain resistance of the paint and other application performance. [0003] The conventional preparation method of covering polymer is mainly divided into three st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F220/14C08F220/06C08F220/18C08F230/08C08F222/14C08F220/40C08F212/36C08F2/26
CPCC08F265/06C08F220/14C08F2/26C08F220/06C08F222/102C08F220/40C08F222/103C08F212/36C08F220/1818C08F230/085
Inventor 王飞孙永建于乃超秦佃斌纪宇轩纪学顺汤汉张延震韩嘉男
Owner WANHUA CHEM GRP CO LTD
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