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Polyphenylene sulfide microparticles

A technology of polyphenylene sulfide and polyphenylene sulfide resin, applied in the field of porous polyphenylene sulfide particles, can solve the problems of high demand and difficulty, and achieve the effect of promoting fusion and inhibiting specific reflection

Active Publication Date: 2016-07-20
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Micronization of such an excellent PPS resin in a porous form is highly demanded as a modifier or additive for various molding processes, coating agents, heat-resistant additives, coatings, etc., but making PPS resin a Porous particles are extremely difficult due to the technical limitations described below

Method used

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  • Polyphenylene sulfide microparticles
  • Polyphenylene sulfide microparticles
  • Polyphenylene sulfide microparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0125] Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to this.

[0126] (Determination of oil absorption of linseed oil)

[0127] The oil absorption of linseed oil was measured according to the method described in Japanese Industrial Standards (JIS) K5101-13-1:2004.

[0128] (Measurement of number average particle diameter)

[0129]The particle size of the porous PPS fine particles in the present invention is a number average particle size. Using a scanning electron microscope (Scanning Electron Microscope JSM-6301NF manufactured by JEOL Ltd.), the PPS microparticles were observed at 100 to 500 magnifications, and the diameter (particle diameter) of 100 PPS microparticles was measured. Next, the number average particle diameter was calculated by obtaining the arithmetic mean of the particle diameters of 100 particles according to the following formula. In addition, when the particles are not perfectly circular on the ...

reference example 1

[0179] [Reference Example 1] Modulation of p-PPS

[0180] (Dehydration process)

[0181] In a 70-liter autoclave with a stirrer and a bottom plug valve, add 47.5% sodium hydrosulfide 8.3kg, 96% sodium hydroxide 2.9kg, N-methyl-2-pyrrolidone 11.5kg, sodium acetate 1.9kg and ion exchange 5.5kg of water, slowly heated to 245°C over about 3 hours while blowing nitrogen gas under normal pressure, distilled 9.8kg of water and 0.3kg of N-methyl-2-pyrrolidone, and then cooled the reaction vessel to 200°C . The amount of water remaining in the system including the water consumed by the hydrolysis of N-methyl-2-pyrrolidone was 1.1 mol per mol of the added alkali metal sulfide. In addition, the scattering amount of hydrogen sulfide was 0.02 mol per 1 mol of the added alkali metal sulfide.

[0182] (polymerization process)

[0183] Next, 10.4 kg of p-dichlorobenzene and 9.4 kg of N-methyl-2-pyrrolidone were added, the reaction vessel was sealed under nitrogen, and the temperature was ...

reference example 2

[0186] [Reference Example 2] Preparation of p- / m-PPS Copolymer

[0187] (Dehydration process)

[0188] In a 1-liter autoclave with a stirrer, add 118g of 47% sodium hydrosulfide, 42.4g of 96% sodium hydroxide, 163g of N-methyl-2-pyrrolidone, 32.0g of sodium acetate and 150g of ion-exchanged water. Next, it was heated slowly to 225°C over about 3 hours while blowing nitrogen gas, 210 g of water and 4 g of N-methyl-2-pyrrolidone were distilled off, and the reaction vessel was cooled to 150°C. The scattering amount of hydrogen sulfide was 1.8 mol%.

[0189] (polymerization process)

[0190] Next, 125 g of p-dichlorobenzene, 22.1 g of m-dichlorobenzene, and 131 g of N-methyl-2-pyrrolidone were added, the reaction vessel was sealed under nitrogen, and the temperature was raised at a rate of 0.8° C. / min while stirring at 400 rpm. to 227°C, then raised to 270°C / min at a rate of 0.6°C / min, and kept at 270°C for 170 minutes. During this time, 14.4 g of water was added over 10 minutes...

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Abstract

Polyphenylene sulfide microparticles having a linseed oil absorption amount of 40-1000 mL / 100 g and a number-average particle size of 1-200 [mu]m. The present invention makes it possible to obtain porous PPS microparticles on a practically useful level that were difficult to manufacture in the prior art. The porous PPS microparticles of the present invention have a large specific surface area, therefore making it possible to promote particle fusion and to form or mold a coating layer of particles at a lower temperature in a shorter time when, e.g., applying heat energy and processing into various molded articles. In addition, because the porous PPS microparticles of the present invention have a porous shape, it is possible to scatter light in multiple directions and to suppress a specific reflection of reflected light in a specific direction, thereby making it possible to impart a shading effect and matte effect when the porous PPS microparticles are added to a medium.

Description

technical field [0001] The present invention relates to porous polyphenylene sulfide fine particles. Background technique [0002] Spherical polymer particles with high specific surface area are used as additives for molding various polymers and modifying / improving materials. As specific uses, in addition to the coating process including the formation of a coating film of polymer particles; the use in various molding processes such as films and sheets, as a modifier for cosmetics, additives for toners, Additives for coatings, additives for molded products, light diffusing agents for films, etc. [0003] In the coating process and various molding processes using polymer particles, the following method is known: after arranging polymer particles or forming a powder layer, applying heat energy to it to fuse polymer particles to each other, and polymer particles A method of molding into a desired shape. In such applications, if the specific surface area of ​​the polymer micro...

Claims

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Application Information

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IPC IPC(8): C08J3/16C08J3/11C08J9/28
CPCC08J3/096C08J3/11C08J3/16C08J9/16C08J9/28C08J2201/0544C08J2205/044C08J2205/05C08J2371/02C08J2381/04C08J2381/06C08J2481/06C08L81/02
Inventor 大坪孝彦浅野到若原叶子竹崎宏
Owner TORAY IND INC
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