Abrasive for moisture blasting, and manufacturing method for same

A sandblasting, wet-type technology, applied in abrasives, manufacturing tools, adhesive types, etc., can solve problems such as deburring performance decline, slurry instability, loss, etc., to achieve good impact resistance, suppression of floating, excellent dispersion The effect of resistance and impact resistance

Inactive Publication Date: 2012-11-28
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the slurry is unstable and thus the use of this slurry in blasting results in a decrease and variation in deburring performance, and causes a lot of loss in the item

Method used

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  • Abrasive for moisture blasting, and manufacturing method for same
  • Abrasive for moisture blasting, and manufacturing method for same
  • Abrasive for moisture blasting, and manufacturing method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] A 5L polymerization vessel equipped with a stir bar and a thermometer was filled with 2500 parts by weight of deionized water, and 50 parts by weight of magnesium pyrophosphate was dispersed therein.

[0122] The mixture liquid was added to the monomer mixture by adding 8 parts by weight of 2'-azobis(2,4-dimethylvaleronitrile), 8 parts by weight of benzoyl peroxide and As a polymerization inhibitor, 4.7 parts by weight of phenol-based antioxidant (manufactured by Sumika Chemtex Co., Ltd.: SUMILIZER BBM-S) was obtained by dissolving, and the monomer mixture was 1400 parts by weight of methacrylic acid Methyl ester, 80 parts by weight of ethylene glycol dimethacrylate and 80 parts by weight of poly(ethylene glycol-propylene glycol) monomethacrylate (manufactured by Nippon Oil & Fats Co. Ltd.: Blemmer 50PEP-300, "m "Is 3 to 4, "n" is 2 to 3) and 0.8 parts by weight of caprolactone EO (ethylene oxide) modified phosphoric acid dimethacrylate mixture, and the monomer mixture is ...

Embodiment 2

[0132] Except that the stirring cycle during drying was changed to a cycle of stirring for 1 minute and allowing it to stand for 29 minutes, the same procedure as in Example 1 was performed to obtain dried polymer particles. The time required for drying is 12 hours. The number of stirrings until drying was 240 times. The number of stirring times for 1kg polymer particles is (240 times / 1.56kg≈) 154 times. When using a scanning electron microscope to observe the dried polymer particles, such as image 3 As shown, it can be confirmed that the polymer particles are particles all having a smooth surface, and no adhesion of latex or the like is seen therein.

[0133] The number of latex bodies etc. adhering to the surface of the dried polymer particles (average value of 5 fields of view) is 5 (⊙).

[0134] The float of the particles is less than 2mm (⊙).

[0135] The time required for particle addition was 22 hours (○).

[0136] The number of items with remaining burrs evaluated by the d...

Embodiment 3

[0139] The same process as in Example 1 was performed except that stirring was not performed through a dryer in the drying step to obtain dried polymer particles. The time required for drying is 27 hours. The number of stirrings until drying is 0 times.

[0140] The number of latex bodies etc. adhering to the surface of the dried polymer particles (average of 5 fields of view) is 2 (⊙).

[0141] The float of the particles is less than 1mm (⊙).

[0142] The time required for particle addition was 27 hours (○).

[0143] The number of items with remaining burrs evaluated by the deburring effect is 10 or less (○).

[0144] The number of articles with cracks and defects evaluated by the cracks and defects of the articles after grinding was 5 or less (○).

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PUM

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Abstract

Disclosed is an abrasive for use in moisture blasting. The disclosed abrasive is formed from spherical polymer particles derived from a monomer mixture containing 0.1-20 parts by weight of a (meth)acrylate monomer containing either an ether group and a hydroxyl group, or an ester group and a hydroxyl group, and 100 parts by weight of a vinyl monomer other than the (meth)acrylate monomer. When polymerisation to the surface of the spherical polymer particles takes place, the attached number of emulsions and/or microparticles which are secondarily generated is not greater than 9 (here the number of attached substances is the average value for five visual fields of an arbitrary region of 6[mu]m * 5[mu]m of the polymer particles).

Description

Technical field [0001] The invention relates to an abrasive used for wet sandblasting and a manufacturing method thereof. More specifically, the present invention relates to an abrasive for wet sandblasting and a method for manufacturing the same, which can make less particles (abrasive) float in wet sandblasting. Background technique [0002] A method for removing excessive burrs and paint adhering to the article by spraying abrasives on the article is known. This method is generally called sandblasting. This kind of sandblasting is used to remove burrs generated in, for example, resin molded objects, die-cast products, semiconductor molds, and automobile parts, and to peel off paint on automobiles and airplanes. [0003] In sandblasting, various materials have been used as abrasives for a long period of time. For example, known inorganic abrasives such as silicon carbide, alumina, silica, ceramics and diamond powder. However, during grinding, these inorganic abrasives may com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C11/00C08F6/24C08F220/00
CPCB24C11/00C08F220/00C09J133/14
Inventor 石森史高
Owner SEKISUI PLASTICS CO LTD
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