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A method for manufacturing modified extra fine heavy calcium carbonate powder

A technology of heavy calcium carbonate powder and manufacturing method, applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc. Shear viscosity, inability to improve the washing resistance of the coating, etc., to achieve the effect of increasing the washing resistance, increasing the high shear viscosity, and improving the hydrophobicity

Active Publication Date: 2009-09-30
广福建材(蕉岭)精化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Used in the coating system, it can only play a filling role, and cannot improve the hydrophobicity of the coating system, cannot increase the wash resistance of the coating, cannot increase the high-shear viscosity of the coating system, and cannot reduce the wetting and dispersing agent and defoamer. The dosage cannot meet the requirements of the coating industry to reduce production costs and improve coating performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Put 10 tons of calcite with a diameter of less than 20 cm into the jaw crusher continuously for crushing, and the crushed small stones enter the hammer crusher for crushing to obtain calcium carbonate coarse material less than 5 mm and enter the coarse material bin; set up above the entrance of the grinder A water tank, add 10 kilograms of polyethylene glycol and 10 kilograms of pure water in the water tank, install a stirrer in the water tank, make the polyethylene glycol and water mix evenly, connect a flow meter with a switch under the water tank, The flow meter is used to control and display the flow rate of polyethylene glycol and water mixture. The bottom of the flow meter is connected to the water pipe. The water pipe introduces the mixed liquid passing through the flow meter to the entrance of the grinder; the coarse calcium carbonate is uniformly distributed through the feeder The mixed liquid of 10 kg polyethylene glycol and 10 kg water meets at the feed inlet ...

Embodiment 2

[0010] Put 10 tons of calcite with a diameter of less than 20 cm into the jaw crusher continuously for crushing, and the crushed small stones enter the hammer crusher for crushing to obtain calcium carbonate coarse material less than 5 mm and enter the coarse material bin; set up above the entrance of the grinder A water tank, add 100 kilograms of polyethylene glycol and 100 kilograms of pure water in the water tank, install a stirrer in the water tank, make the polyethylene glycol and water mix evenly, connect a flow meter with a switch under the water tank, The flow meter is used to control and display the flow rate of polyethylene glycol and water mixture. The bottom of the flow meter is connected to the water pipe. The water pipe introduces the mixed liquid passing through the flow meter to the entrance of the grinder; the coarse calcium carbonate is uniformly distributed through the feeder The mixed liquid of 100 kg polyethylene glycol and 100 kg water meets at the feed in...

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Abstract

The invention relates to a method for manufacturing modified extra fine heavy calcium carbonate powder; polyglycol and water are evenly mixed according to a mass ratio of 1:1 to get fluid A which is added from an inlet orifice of a muller and enters the muller together with coarse fodder entering the muller; the coarse fodder is continuously grinded to be fine, ceaselessly mixed to be even with the fluid A, and evenly wrapped simultaneously; wrapped modified extra fine heavy calcium carbonate powder is separated after entering a grader through wind, thus obtaining modified extra fine heavy calcium carbonate powder. The modified extra fine heavy calcium carbonate of the invention not only ensures retaining of characteristics of modified extra fine heavy calcium carbonate powder, but can improve lipophilicity, wettability and disperse stability of powder body. After applied to a latex system, the modified extra fine heavy calcium carbonate powder obtained by the invention can improve hydrophobic mature of a dope system, rinse resistant times, high shear viscosity of a latex system, construction property, and reduce dosage of moistening dispersant and foam suppressor in the meanwhile.

Description

technical field [0001] The invention relates to a method for coating a polyethylene glycol surfactant on the surface of superfine heavy calcium carbonate powder to manufacture a modified superfine heavy calcium carbonate powder. Background technique [0002] Non-metallic mineral powders are used in the production of coatings, such as calcined kaolin, calcium carbonate powder and other fillers. Calcium carbonate is an indispensable filler in coating formulations, and the proportion of use in coating formulations can even reach 20. ~30%. Ultrafine heavy calcium carbonate powder is produced by dry grinding and classification. During the product manufacturing process, through the design of the production process, such as adding grinding aids and multi-channel classification of the product, the product fineness can reach an average particle size of 0.5~ 5μm, these manufacturing technologies are ultimately product grinding and grading technologies, and the functions of the produc...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/00C09C3/04C09C3/10C09D7/12
Inventor 陈永坚朱建龙
Owner 广福建材(蕉岭)精化有限公司
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