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Resin particles and method for producing same, and method for controlling particle size of resin particles

A technology of resin particles and manufacturing methods, which is applied in the field of particle size and particle size adjustment, can solve the problems of tiny particles, processing hindrance, and reaction solution processing problems, and achieve the effect of high dispersion

Active Publication Date: 2014-08-27
SOKEN CHEM & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, these methods have problems in the handling of the reaction solution because the polymerization system contains metals or inorganic substances.
In addition, if the addition amount of inorganic compounds such as silica is less than a certain amount, the effect cannot be obtained, so the silica attached to the surface of the obtained resin particles will become an obstacle in the subsequent processing.
Moreover, even in these methods, tiny particles are generated, which do not meet the requirements
[0006] In addition, there are known excellent dispersible resin particles obtained by copolymerizing (meth)acrylate and a monomer having a carboxyl group and coated with a nonionic surfactant. Process-obtained resin pellets, the production of which requires various processes (Patent Document 5)

Method used

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  • Resin particles and method for producing same, and method for controlling particle size of resin particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] 70 parts by weight of methyl methacrylate and 30 parts by weight of trimethylolpropane triacrylate were added to a glass flask with a capacity of 1 liter, and mixed well. 0.7 weight part of sorbitan laurate (HLB value: 8.6) was added there, and it stirred and melt|dissolved. Next, 0.5 parts by weight of lauroyl peroxide was added, stirred and dissolved sufficiently, and a polymerizable oily monomer solution was prepared.

[0126] 80 parts by weight of ion-exchanged water was added to the above-mentioned polymerizable oily monomer solution, and the obtained mixed phase was stirred at 13000 rpm (peripheral speed: 19.2 m / sec) for 1 minute with a homomixer to obtain an emulsion. To this emulsion was added an aqueous solution obtained by dissolving 1.0 parts by weight of polyvinyl alcohol (manufactured by Kuraray Co., Ltd.: product name PVA-224) in 180 parts by weight of tap water. °C for 3 hours to obtain a resin particle dispersion.

[0127]After the obtained resin parti...

Embodiment 2

[0129] 70 parts by weight of methyl methacrylate and 30 parts by weight of trimethylolpropane triacrylate were added to a glass flask with a capacity of 1 liter, and mixed well. 0.6 weight part of sorbitan laurate (HLB value: 8.6) was added there, and it stirred and melt|dissolved. Next, 0.5 parts by weight of lauroyl peroxide was added, stirred and dissolved sufficiently, and a polymerizable monomer solution was prepared.

[0130] Add 80 parts by weight of ion-exchanged water, 0.3 parts by weight of colloidal silicon dioxide, and polyvinyl alcohol (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd. (Daiichi Kogyo Pharmaceutical Co., Ltd.): trade name PITZCOL V- 7154) 0.01 part by weight, and the obtained mixed phase was stirred at 13000 rpm (peripheral speed: 19.2 m / sec) for 1 minute with a homomixer to obtain an emulsion. To this emulsion was added an aqueous solution obtained by dissolving 1.0 parts by weight of polyvinyl alcohol (manufactured by Kuraray Co., Ltd.: tra...

Embodiment 3

[0133] 70 parts by weight of methyl methacrylate, 30 parts by weight of trimethylolpropane triacrylate, and 0.3 parts by weight of 4-hydroxybutyl acrylate were added to a glass flask with a capacity of 1 liter, and mixed well. 0.3 weight part of sorbitan laurate (HLB value: 8.6) was added there, and it stirred and melt|dissolved. Next, 0.5 parts by weight of lauroyl peroxide was added, stirred and dissolved sufficiently, and a polymerizable monomer solution was prepared.

[0134] 60 parts by weight of ion-exchanged water, 0.1 part by weight of colloidal silica, and 0.1 part by weight of polyvinyl alcohol (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.: trade name PITZCOL V-7154) were added to the above-mentioned polymerizable monomer solution. The mixed phase was stirred at 8000 rpm (peripheral speed: 11.7 m / sec) for 1 minute with a homomixer to obtain an emulsion. To this emulsion was added an aqueous solution obtained by dissolving 1.0 parts by weight of polyvinyl a...

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Abstract

The present invention can produce resin particles having uniform particle sizes by a suspension polymerization method, and provides a method for producing resin particles having high dispersibility in an organic binder or an organic solvent conveniently. Each of the resin particles according to the present invention is characterized in that an ester moiety that constitutes a sorbitan fatty acid ester having no polyoxy alkylene group is buried in each of the resin particles, many sorbitan moieties each bound to the ester moiety are present on the surface of each of the resin particle, and the coefficient of variation (a CV value) of average particle diameters of resin particles that constitute the resin particles is 30% or less.

Description

technical field [0001] The present invention relates to a resin particle cluster, a method for producing the same, and a method for adjusting the particle size of the particles of the resin particle cluster. More specifically, the present invention relates to a resin particle cluster having a uniform particle size, a method for producing the same, and a method for adjusting the particle size of the resin particle cluster. Background technique [0002] Resin particles such as acrylic resins and styrene resins are widely used for optical materials, cosmetics, molding resins, additives in paints, and the like. In each application, resin particles are required to have uniform particle diameters. [0003] As a method for producing resin particles with a uniform particle size, a method for classifying resin particles with a wide particle size distribution produced by suspension polymerization or spray polymerization; by using seeds with a controlled particle size in seed polymeri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/18C08F20/10
CPCC08F2/44C08K5/1535C08F20/10C08F2/18C08F220/14C08F222/103C08F220/20C08F222/102
Inventor 山本智小萱亚矢土屋智惠
Owner SOKEN CHEM & ENG CO LTD
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