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Preparation method of odor-free redispersible latex powder

A technology for redispersing latex powder and deodorizing, which is applied in the direction of adhesive types, non-polymer adhesive additives, monocarboxylate copolymer adhesives, etc., and can solve the problems that redispersible latex powder cannot satisfy , to achieve the effect of increasing environmental performance

Inactive Publication Date: 2019-06-28
北京博润佳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the redispersible latex powder that prior art prepares can't satisfy the product standard of diatom ooze and shell powder industry, and the content of VOC, benzene series total sum and free formaldehyde is all still relatively high, therefore, urgently needs a kind of new preparation reusable The emergence of the method of dispersing latex powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Preparation of spray liquid: use process water to mix polyvinyl alcohol 0588 30kg into a polyvinyl alcohol solution with a solid content of 10%, and mix the prepared polyvinyl alcohol solution, 500kg of polyvinyl acetate emulsion with a solid content of 55% and process water Add 300kg into the blending kettle and stir, heat to 60°C after 15 minutes, then add 0.3kg of initiator potassium persulfate, keep warm and continue stirring for 60 minutes to obtain the spray liquid;

[0023] b. Spray drying: feed the spray liquid and anti-caking agent fumed silica into the drying tower at the same time. The temperature is 120°C, the material enters the fluidized dryer, keeps the temperature at 120℃ for 1h in the fluidized dryer, then cools down to 90℃, discharges and packs.

Embodiment 2

[0025] a. Preparation of spray liquid: use process water to mix polyvinyl alcohol 0588 40kg into a polyvinyl alcohol solution with a solid content of 10%, and mix the prepared polyvinyl alcohol solution, 550kg of polyvinyl acetate emulsion with a solid content of 55% and process water Add 50kg into the blending kettle and stir, heat to 60°C after 15 minutes, then add 0.4kg of initiator potassium persulfate, keep warm and continue stirring for 60 minutes to obtain the spray liquid;

[0026] b. Spray drying: feed the spray liquid and anti-caking agent fumed silica into the drying tower at the same time. The temperature is 120°C. The material enters the fluidized dryer, keeps the temperature at 130°C for 30 minutes in the fluidized dryer, then cools down to 90°C, discharges and packs.

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PUM

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Abstract

The invention discloses a preparation method of an odor-free redispersible latex powder. The preparation method comprises the following specific steps that a spray liquid is prepared, wherein polyvinyl alcohol 0588 is prepared into a polyvinyl alcohol solution with a solid content of 10%, the polyvinyl alcohol solution, a polyvinyl acetate emulsion and water are added into a mixing tank for stirring, and then the solution is heated to 50-70 DEG C, then an initiator is added, heat-preservation stirring is continued for 1 hour, and the spray liquid is obtained; spray drying is performed, whereinthe spray liquid and an anticaking agent are simultaneously added into a drying tower for spray drying for 5-10 minutes, the inlet temperature of the drying tower is 150-170 DEG C, the outlet temperature of the drying tower is 120-130 DEG C, latex powder from the drying tower directly enters an efficient boiling bed, drying is performed for 30-60 minutes in the boiling bed at 120-130 DEG C, thenthe temperature is reduced to 60-90 DEG C, and discharging and package are performed. The prepared odor-free redispersible latex powder has lower contents of VOC, sum of benzene series and free formaldehyde and better performance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing net-odor redispersible latex powder. Background technique [0002] Odor-clean redispersible latex powder is white powder, and its main purpose is to improve its various properties in dry powder interior wall decoration materials such as diatom mud, shell powder, and interior wall putty. As it is used as a decorative material for interior walls, the requirements for the environmental protection performance of various raw materials are relatively high. Since ordinary redispersible latex powder has not been specially treated, the content of VOC, the sum of benzene series and free formaldehyde is still relatively high. High, with the implementation of national energy conservation and emission reduction policies, it is imperative to apply odor-free redispersible latex powder in interior wall products. [0003] The preparation of redispersible latex powder main...

Claims

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Application Information

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IPC IPC(8): C09J131/04C09J129/04C09J11/04
Inventor 王小梅许小草姚超超董慧艳王建荣吴梓红
Owner 北京博润佳科技有限公司