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Additive for molding of ceramic material

An additive, ceramic technology, applied in non-metallic conductors, organic material conductors, etc., can solve the problems of hindering the water absorption of particulate polymers, insufficient water absorption, unsatisfactory, etc., to achieve good fluidity, excellent water absorption, shape retention Excellent effect

Active Publication Date: 2014-11-26
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, even in the case of using the polymer microparticles according to Patent Document 3, when there are many residual monomers, ionic impurities are released, which hinder the water absorption of the microparticle polymer, so the water absorption in the kneading clay may sometimes be reduced. Insufficient, resulting in high fluidity during extrusion molding and ensuring shape retention of the molded product after extrusion, sometimes not satisfactory

Method used

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  • Additive for molding of ceramic material
  • Additive for molding of ceramic material
  • Additive for molding of ceramic material

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 0

[0091] Production Example 0: Production of Macromer Composition UM-1

[0092] The temperature of the oil jacket of the pressurized stirred tank type reactor with a capacity of 1000 ml which has an oil jacket was maintained at 240 degreeC.

[0093] 75.0 parts of lauryl methacrylate (hereinafter referred to as "LMA") as a monomer, 25.0 parts of acrylic acid (hereinafter referred to as "AA"), 10.0 parts of methyl ethyl ketone as a polymerization solvent, and as a polymerization initiator The monomer mixture adjusted by the ratio of 0.45 parts of di-tert-butyl peroxide is charged into the raw material tank.

[0094] The supply of the monomer mixed liquid in the raw material tank to the reactor was started, and the supply of the monomer mixed liquid and the extraction of the reaction mixed liquid were performed so that the weight in the reactor was 580 g and the average residence time was 12 minutes. Adjustments were made so that the temperature in the reactor was 235° C. and the ...

manufacture example 1

[0099] (Production Example 1: Production of Polymer Microparticles A-1)

[0100] For the polymerization, a reactor having a stirring mechanism consisting of a pitched paddle type stirring blade and two vertical baffles, a thermometer, a reflux cooler, and a nitrogen introduction pipe was used. In addition, the nitrogen introduction pipe is branched into two outside the reactor, nitrogen can be supplied from one, and the polymerization catalyst can be supplied from the other using a pump. In addition, the nitrogen introduction pipe was connected to the wall surface of the reactor at substantially the same height as the upper end of the stirring blade.

[0101] 11.5 parts of UM-1 as a dispersion stabilizer and 2.0 parts of sorbitan trioleate (manufactured by Kao Corporation, trade name "Leodol SP-O30V") were charged into the reactor, and n-heptane was further charged as a polymerization solvent 160.0 parts were stirred and mixed while maintaining the temperature of the solution...

manufacture example 2

[0107] (Production Example 2: Production of Polymer Microparticles A-2)

[0108] In addition to making the monomer aqueous solution consist of 50.0 parts of AA, 125.0 parts of 40% AMD, 3.6 parts of Aronics M-243, 0.02 parts of p-methoxyphenol, 30.0 parts of ion-exchanged water and 35.4 parts of 25% ammonia water, the stirring speed was Except for 610 rpm, it was produced in the same manner as in Production Example 1 to obtain a dry powder of polymer microparticles A-2.

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Abstract

The present invention relates to an additive for use in the molding of a ceramic material, which exhibits satisfactory water absorption performance in a ceramic green ceramic clay, can highly achieve both high fluidability and low loading performance during extrusion molding and high shape-retaining performance after extrusion at the same time, and comprises polymer microparticles. This additive for use in the molding of a ceramic material comprises polymer microparticles, is characterized in that the polymer microparticles have an average particle size between 10 and 150 µm when the polymer microparticles are swollen with ion exchange water until the swollen polymer microparticles reach a saturated state and can absorb 10-60 mL / g of ion exchange water under ordinary pressure, and is also characterized in that an aqueous dispersion prepared by dispersing 1 part by mass of the polymer microparticles in 110 parts by mass of ion exchange water has an electrical conductivity of 1500 µS / cm or less at 25°C.

Description

technical field [0001] The present invention relates to an additive for ceramic molding containing polymer particles with high crosslink density, which is effective for improving the kneading and moldability of ceramics and obtaining high-precision moldings with good reproducibility, especially in water-based ceramic molding. Background technique [0002] As a general molding method of ceramics, various methods such as extrusion molding, injection molding, and casting molding can be cited. For example, extrusion molding is a method of extruding from a mold by applying pressure to a kneaded composition (hereinafter also referred to as kneaded clay) obtained by kneading ceramic powder, a binder, water, etc. , suitable for efficiently manufacturing products with a certain cross-sectional shape, such as rod or tube. Filters, catalyst supports, etc. have also been produced by this extrusion molding method, but in recent years, in order to improve their performance, high-precisio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/06C08F20/58
CPCC04B24/124C08F20/58C08F20/06C04B35/632C04B24/12C04B35/195C04B35/634C04B2235/5427C04B2235/5436C04B2235/5463C04B2235/6021C04B2235/606C04B2235/9638C08F220/06C08F4/40C08F220/56C08F220/286C08F222/1063C08F220/585H01B1/12
Inventor 后藤彰宏松崎英男
Owner TOAGOSEI CO LTD