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organic polymer particles

A polymer and organic technology, applied in the field of organic polymer particles, can solve the problems of difficulty in peeling, film adhesion, and difficulty in sliding, and achieve the effect of inhibiting shedding.

Active Publication Date: 2021-10-22
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the resin film is stored in a roll or stacked state, the films may stick together, making it difficult to slide and peel off

Method used

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  • organic polymer particles
  • organic polymer particles
  • organic polymer particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0209] Fabrication of Organic Polymer Microparticles

[0210] In a flask equipped with a stirrer, an inert gas introduction pipe, a reflux cooler and a thermometer, add dissolved polyoxyethylene distyryl phenyl ether sulfate ammonium salt (trade name "HITENOL (registered trademark) NF-08", No. 523 parts of 3.6 parts of deionized water manufactured by Ilko Kogyo Pharmaceutical Co., Ltd. Add pre-prepared, 252 parts of methyl methacrylate (MMA) as a monomer, 108 parts of ethylene glycol dimethacrylate (EGDMA), and lauroyl peroxide (LPO) as a polymerization initiator 3.6 parts (1% by mass relative to the monomer mass), and hindered phenolic antioxidant (BASF Japan, trade name "Irganox (registered trademark) 1010", pentaerythritol tetrakis [3-(3,5-di tert-butyl-4-hydroxyphenyl) propionate]) 1.8 parts (0.5% by mass relative to the monomer), using T.K.HOMOMIXER MARK II model 2.5 (manufactured by Primix Co., Ltd.), stirring at 5000rpm for 10 minutes to become uniform of the suspension...

Embodiment 2-6

[0220] Organic polymer microparticles were prepared in the same manner as in Example 1, except that the composition of the monomers and the amount of the polymerization initiator used were changed as shown in Table 1. The water content of the dried organic polymer fine particles was all 1% or less. Further, a thin film was prepared in the same manner as in Example 1.

[0221] The average particle diameter, coefficient of variation, average particle diameter ratio (Dn / Dw), sedimentation start time, thermal decomposition start temperature, friction coefficient of the film (μ s , μ k ), the film peeling rate before and after the friction test are shown in Table 2.

[0222] In addition, when the Al content of the organic polymer fine particles obtained in Example 3 was measured, it was less than 30 ppb.

Embodiment 7

[0224] The monomer composition and the amount of polymerization initiator used were the same as in Example 2 to prepare organic polymer fine particles. The moisture content of the organic polymer fine particles after drying is 1% or less. The obtained dried organic polymer fine particles were aggregated by drying, and pulverized at room temperature with a pulverization pressure of 0.3 MPa using a super gas pulverizer SJ-500 (manufactured by Nissin Engineering Co., Ltd.). Thus, non-agglomerated organic polymer fine particles are obtained. The fine particles obtained were mainly removed fine particles of 1 μm or less using a classifier TC-15 (manufactured by Nissin Engineering Co., Ltd.).

[0225] The average particle diameter, coefficient of variation, average particle diameter ratio (Dn / Dw), sedimentation start time, thermal decomposition start temperature, friction coefficient of the film (μ s , μ k ), the film peeling rate before and after the friction test are shown in T...

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Abstract

An object of the present invention is to provide organic polymer fine particles whose detachment from a film is highly suppressed when used as an antiblocking agent for a film. The organic polymer microparticles of the present invention are characterized in that they are (meth)acrylic polymers crosslinked with bifunctional crosslinkable monomers, wherein in the crosslinked (meth)acrylic polymers, based on The structural unit of the bifunctional cross-linking monomer is 5 mass% or more and 35 mass% or less, the sedimentation start time is 16 seconds or more, and the Al content, sulfur atom The contents are 1 ppm or less and 300 ppm or less, respectively, and contain hindered phenolic antioxidants or their source components.

Description

technical field [0001] The present invention relates to organic polymer microparticles composed of a (meth)acrylic polymer crosslinked with a bifunctional crosslinkable monomer. Background technique [0002] Resin films are widely used as various packaging materials. When the resin film is stored in a roll or stacked state, the films may stick together, making it difficult to slide and peel off. In order to prevent such blocking, an antiblocking agent is used. In addition, unless otherwise stated, when simply expressing a film in this specification, it means a resin film. [0003] As an antiblocking agent, from the viewpoint of maintaining the transparency of a film and suppressing scratches, fine resin particles are widely used. As resin fine particles, for example, Patent Document 1 describes organic polymer fine particles containing a sulfur-based antioxidant. In addition, Patent Document 2 describes ( Meth)acrylate cross-linked microparticles. Further, Patent Docum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/10C08F2/18C08F2/44C08F220/20C08J3/22C08J5/18C08L23/00C08L33/04C08L101/00
CPCC08F2/18C08J5/18C08L101/00C08L2310/00B32B27/32C08J3/226C08J2423/12C08F220/14C08J2323/12C08J2433/12C08L23/12C08L2203/16C08L2205/06B32B27/08B32B2250/24B32B27/20B32B2264/0214B32B27/36B32B27/34B32B27/308B32B27/365B32B27/302B32B2307/732B32B2307/746B32B2439/70B32B2439/80C08L33/12C08F222/103C08F222/102C08F2/44C08F6/28C08F220/10C08F220/20C08J3/22C08L33/04C08F2810/20C08F2/20
Inventor 大河内弘子高田智成松本和明中谷泰隆
Owner NIPPON SHOKUBAI CO LTD
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