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Polyacrylate emulsion with high solid content, low viscosity and high stability prepared by double polymerizable emulsifier and method
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A technology of polyacrylate emulsion and polymerized emulsifier is applied in the fields of adhesives and coatings, which can solve the problems of complex process and difficult industrial production.
Active Publication Date: 2019-03-01
武汉强力荷新材料有限公司
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There are also researchers who use the method of extraction to increase the solid content and reduce the viscosity [Liu Jianping, Sun Yanlin, Wang Hong, etc., Monomer composition and rheological behavior of high solid contentacrylate copolymer emulsion [J]. PolymerMaterials Science and Engineering ,2008,24(7):48-51], these methods are complicated in technology and not easy for industrial production
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[0027] The obtained copolymer emulsion has a solid content of 60%-75%, a storage time of 21 months, and a viscosity of 280-360mpa·s.
[0028] ②The emulsifier system is a non-ionic polymerizable emulsifier and an anionic conventional emulsifier, and the reaction temperature is 80±2°C
[0029] seed emulsion
[0030]
[0031] final emulsion
[0032]
[0033] The solid content of the obtained copolymer emulsion is 60%-75%, the storage time is 12 months, and the viscosity is 300-400mpa·s.
[0034] ③The emulsifier system is a conventiona...
Embodiment 2
[0046] Preparation of High Solids Low Viscosity Emulsions for Interior and Exterior Coatings
[0047] The emulsifier system is a double polymerizable emulsifier, and the reaction temperature is 80±2°C
[0048] seed emulsion
[0049]
[0050] final emulsion
[0051]
[0052] The obtained copolymer emulsion has a solid content of 60%-75%, a gel rate of 1.03%, a storage time of 18 months, and a viscosity of 200-280mpa·s.
Embodiment 3
[0054] Preparation of High Solids Low Viscosity Emulsions for Waterborne Electrophoretic Automotive Body Coatings
[0055] The emulsifier system is a double polymerizable emulsifier, and the reaction temperature is 80±2°C
[0060] The obtained copolymer emulsion has a solid content of 60%-70%, a storage time of 12 months, and a viscosity of 150-250mpa·s.
[0061] Factors such as monomer type, reaction temperature, emulsifier type, double-polymerizable emulsifier dosage, different emulsifier ratios, initiator concentrations and the like all affect the realization of the present invention, and no examples are given here.
[0062] The main indicator of the polymer emulsion prepared by the inventive method
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Abstract
The invention relates to an bipolymerizable emulsifier prepared polyacrylate emulsion with a high solid content, low viscosity and high stability and a method. A copolymeremulsion with a high solid content (>=70%), low viscosity (<=400m Pa.s) and high stability is synthesized with methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA) and the like as raw materials, and with a compound of a nonionic polymerizable emulsifier of allyloxy polyoxyethylene ether (F) and an anionic polymerizable emulsifier of allyloxy alkylphenolpolyoxyethylene ethersulfate (DNS) as a monomer emulsifier system. All of the polymerizable emulsifier must be premixed with the monomer uniformly to prevent separate homopolymerization of the polymerizable emulsifier. During prophase preparation of the emulsion, the bipolymerizable emulsifier and the monomer are mixed under an anhydrous condition for dropping; and during middle and late phases of the emulsifier preparation, a buffer containing a pre-emulsion (the bipolymerizable emulsifier and the monomer), an initiator and water are mixed together for emulsification.
Description
technical field [0001] The invention relates to a method for preparing high solid content acrylate emulsion by using polymerizable nonionic and polymerizable anionic emulsifiers. The invention belongs to the technical field of coatings, adhesives and the like. Background technique [0002] In recent years, with the rise of calls for green environmental protection and circular economy, water-based polymer systems have become one of the important development directions, among which high-solid-content and low-viscosityacrylatepolymer emulsions have become research hotspots, and domestic related patents (CN103232566) adopt Conventional anionic emulsifiers are compounded with nonionic emulsifiers to prepare acrylate emulsions with a solid content of more than 70%. However, such polymer emulsions generally have poor performance, especially stability. [0003] Conventional emulsifiers usually adhere to the surface of polymer particles by physical adsorption, are easily affected ...
Claims
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