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Water-based paint containing nano-zinc oxide and with enhanced high heat retaining property for evanescent mold casting and preparation method thereof

A technology of nano-zinc oxide and lost foam casting, which is applied to casting molding equipment, coatings, casting molds, etc. It can solve the problems of product performance defects, easy to collapse, and failure to reach, so as to improve surface quality and air permeability , Coating even and smooth effect

Inactive Publication Date: 2015-11-18
MINGGUANG CITY LIUXIANG PUMP IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The composition of lost foam coatings mainly includes refractory aggregates, adhesives, solvents, suspending agents and various additives. According to the nature of the binder used, it is mainly divided into water-based coatings, alcohol-based coatings, resin coatings, etc. Among them, water-based coatings are widely used in actual production because of their low cost. However, water-based coatings are easy to collapse and stick to sand when the coating is cleaned, and most of the products still have defects in the performance of the products. described effect

Method used

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Embodiment

[0011] The coating of this embodiment is made of the following raw materials by weight: magnesium aluminum silicate 1.5, 250 mesh pyrophyllite powder 22, 180 mesh quartz sand 45, nano zinc oxide 2, chitosan 0.01, microcrystalline cellulose 0.1, OP -100.02, polyquaternium 0.002, defoamer 0.01, white latex 2.5, sodium carboxymethyl cellulose 0.3, soft water 30.

[0012] The preparation method of this coating is:

[0013] (1) Put OP-10, sodium carboxymethyl cellulose, and chitosan into soft water first, stir until they are completely dissolved, then put in nano zinc oxide, stir at high speed ultrasonically to disperse evenly in the solution, and then add silicic acid Magnesium-aluminum and microcrystalline cellulose were stirred, mixed and ground for 40 minutes, and the resulting mixed slurry was set aside;

[0014] (2) Put pyrophyllite powder, quartz sand and 20 parts by weight of the slurry prepared in step (1) into the mixing tank, stir at high speed and disperse for 35 minut...

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Abstract

The invention relates to the technical field of evanescent mold casting, in particular to water-based paint containing nano-zinc oxide and with enhanced high heat retaining property for evanescent mold casting and a preparation method thereof. Pyrophyllite powder and quartz sand with different grain sizes are used as refractory aggregates of the water-based paint, so that the air permeability of a coating is good, and the coating is even and smooth. Mixed slurry of nano-zinc oxide, aluminum-magnesium silicate and sodium carboxymethylcellulose is used as a suspending agent which enables the water-based paint to be good in suspension property and thixotropy, and the heat retaining property of the coating is further improved. The air permeability of a coating surface can be improved after microcrystalline cellulose disperses in the coating. The paint coating prepared through the method is firm, insulated, compact, permeable and easy to clean; the liquid metal is not polluted and the surface quality of a casting is improved effectively.

Description

technical field [0001] The invention relates to the technical field of lost foam casting, in particular to a water-based coating for lost foam casting with nano zinc oxide reinforcement and a preparation method thereof. Background technique [0002] The coating for lost foam refers to a layer of special coating coated on the outer surface of the pattern during the lost foam casting process. It plays a key role in the casting process. Since the pattern is made of foam plastic, the gas permeability of the coating , coating strength, rheology and other properties will have a crucial impact on the casting product. The lost foam coating with excellent performance should meet: (1) It can help improve the strength and rigidity of the foam plastic pattern and prevent the pattern from being damaged and deformed. (2) It has the function of isolation, which separates the molten metal from the model, prevents the molten metal from penetrating into the dry sand, and prevents the formatio...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 刘和明刘和兵
Owner MINGGUANG CITY LIUXIANG PUMP IND
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