Multipurpose redispersible emulsion powder and preparation method thereof

A redispersible latex powder, multi-purpose technology, applied in the field of latex powder and its preparation, can solve the problems of poor redispersibility, narrow application range, and insignificant improvement of the performance of cement products, and achieve stable performance, wide application, Good redispersibility effect

Active Publication Date: 2011-01-12
徐永泽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is currently commercially available redispersible latex powder products or the disclosed redispersible latex powder technology, the redispersibility of the products is relatively poor, and the application in construction cement mortar has a great influence on the performance of cement products. The improvement is not significant, and the scope of application is relatively narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. The material ratio of polymer emulsion (according to the production of 1000kg emulsion):

[0032] a. Polyvinyl alcohol (05-88 or 205) 35kg

[0033] b.OP-10 (emulsifier) ​​5kg

[0034] c. Ammonium persulfate (initiator) 1kg

[0035] d. Vinyl acetate 320kg

[0036] e. Sodium bicarbonate (adjusting pH) 1kg

[0037] f. Vinyl tertiary carbonate (-VeoVa) 125kg

[0038] g. Butyl acrylate (BA) 22kg

[0039] h. Ethyl acrylate (EA) 25kg

[0040] i. Silicone 691 (defoamer) 1kg

[0041] j. Water 465kg

[0042] Two, the preparation of vinyl acetate copolymer emulsion:

[0043] 1. According to the above-mentioned amount of materials, first add water into the reaction kettle, add defoamer, and then add polyvinyl alcohol under stirring, heat up to 85-95°C and keep warm for 1 hour to dissolve.

[0044] 2. Cool down to 75°C, add OP-10 emulsifier and stir for 10 minutes, add 30% of the initiator ammonium persulfate and 5kg of water for the first time, mix evenly, and add butyl...

Embodiment 2

[0055] 1. The material ratio of polymer emulsion (according to the production of 1000kg emulsion):

[0056] a. Polyvinyl alcohol (05-88 or 205) 35kg

[0057] b.OP-10 (emulsifier) ​​5kg

[0058] c. Ammonium persulfate (salt, initiator) 1.15kg

[0059] d. Vinyl acetate 325kg

[0060] e. Sodium bicarbonate (adjusting pH) 0.75kg

[0061] f. Vinyl tertiary carbonate (-VeoVa) 125kg

[0062] g. Butyl acrylate (BA) 20kg

[0063] h. Ethyl acrylate (EA) 20kg

[0064] i. Silicone 691 (defoamer) 1kg

[0065] j. Water 470kg

[0066] The preparation of the vinyl acetate copolymer emulsion, the preparation of the spray liquid and the spray drying were all completed according to the operation steps of Example 1.

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Abstract

The invention discloses a multipurpose redispersible emulsion powder and a preparation method thereof. The multipurpose redispersible emulsion powder comprises the following components in portions by weight: 120-140 portions of polyvinyl alcohol, 4.0-6.0 portions of emulsifying agent, 1.0-1.2 portions of ammonium persulfate, 300-350 portions of vinyl acetate, 0.5-1.0 portion of sodium bicarbonate, 100-150 portions of vinyl versatate, 20-25 portions of butyl acrylate, 20-30 portions of ethyl acrylate, 0.5-1.5 portions of silicone and 300-450 portions of ethyl acetate-acetic acid copolymer emulsion (CW-718). The emulsion powder has the advantages of good redispersibility, stable performance, high low-temperature construction applicability and wide application, can be used as a high-quality additive of varieties of putty powder, and can be made into three-dimensional modules, external heat-insulating adhesion materials for exterior walls, ceramic tile adhesive, gap-filling cement, flexible cement, plastering and repairing materials, cement mortar capable of flowing by gravity, powder emulsion paint and the like.

Description

technical field [0001] The invention relates to a latex powder and a preparation method thereof, in particular to a redispersible latex powder as a main additive of cement-based or gypsum-based dry-mixed ready-mixed mortar and a preparation method thereof. Background technique [0002] Redispersible latex powder is a modified dry powder obtained by spray drying vinyl acetate and tertiary vinyl ester-VeoVa or ethylene or acrylate and other binary or terpolymer emulsions and other additives. It is mainly used in the construction industry High-quality cement dry powder mortar is an important additive to improve the performance of cement products. However, whether it is currently commercially available redispersible latex powder products or the disclosed redispersible latex powder technology, the redispersibility of the products is relatively poor, and the application in construction cement mortar has a great influence on the performance of cement products. The improvement is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L31/04C08F218/08C08F220/18C08J3/12
Inventor 徐永泽
Owner 徐永泽
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