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Vinyl acetate-ethylene copolymer emulsion (VAE emulsion) and synthesis method thereof

A technology of ethylene copolymerization emulsion and vinyl acetate, which is applied in the field of fine particle size VAE emulsion and its preparation, can solve problems such as not being able to meet the needs of the market, and achieve the effects of fast speed, easy industrialization, and short polymerization time

Active Publication Date: 2014-06-04
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Today, VAE emulsion has become a base material widely used in the field of adhesives. However, with the great improvement of the production technology of its downstream application industry, the application field is also expanding, so the original conventional grades can no longer be used. To meet the needs of the market, it is necessary to develop a variety of high-performance products, among which the fine particle size emulsion with a wide range of uses is extremely advantageous

Method used

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  • Vinyl acetate-ethylene copolymer emulsion (VAE emulsion) and synthesis method thereof

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Experimental program
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Embodiment 1

[0038] 1. Preparation of raw materials

[0039] (1) Add 2.5 parts of emulsifier for initial reaction and 42 parts of deionized water into the reactor, start stirring, heat up after fully mixing, add 0.1 part of sodium bisulfite to make it completely dissolved; wherein the emulsifier for initial reaction Specifically, 0.5 parts of reactive anionic emulsifier of sodium vinylsulfonate SVS, 1.7 parts of anionic emulsifier of sodium dodecylbenzenesulfonate DS-10 and nonionic emulsifier of nonylphenol polyoxyethylene ether Co-887 0.3 parts.

[0040] (2) Add 0.1 part of ammonium persulfate, 1.5 parts of deionized water and stir for 15 minutes to make initial initiator solution in the initial initiator tank, add 0.2 part of ammonium persulfate, 0.1 part of sodium bicarbonate, 2.0 parts of sodium bicarbonate in the continuous initiator tank One part of emulsifier for continuous reaction and 8 parts of deionized water were stirred for 20min to be mixed with continuous initiator solutio...

Embodiment 2

[0048] Get 5.2 parts of emulsifiers (2.8 parts of emulsifiers for initial stage reaction, 2.4 parts of emulsifiers for continuous reactions; wherein said initial reaction emulsifiers are specifically 0.6 parts of reactive anionic emulsifiers of sodium vinyl sulfonate (SVS), 0.5 parts of nonionic emulsifiers of 1.7 parts of sodium dodecylbenzenesulfonate (DS-4AP) anionic emulsifier and octylphenol polyoxyethylene ether (X-305);

[0049] The emulsifier for the continuous reaction is specifically 0.8 parts of reactive anionic emulsifier of sodium allyl sulfonate (SAS) and 1.6 parts of anionic emulsifier of ethoxylated ether ammonium sulfate EP-120;), 60 parts of deionized Water, 0.5 part of ammonium persulfate, 0.3 part of sodium bisulfite, 0.2 part of sodium bicarbonate, 0.04 part of zinc formaldehyde sulfoxylate, 90 parts of vinyl acetate monomer, 25 parts of ethylene, prepare the fine particle size with the method of embodiment 1 VAE emulsion, the results are as follows:

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Embodiment 3

[0052] Get 7 parts of emulsifiers (3.8 parts of emulsifiers for initial stage reaction, 3.2 parts of emulsifiers for continuous reaction; wherein said emulsifier for initial stage reaction is specifically allyloxy nonylphenol polyoxyethylene (10) ether ammonium sulfate ( DNS-86) reactive anionic emulsifier 0.8 parts, sodium dodecylbenzenesulfonate (DS-4AP) anionic emulsifier 2.4 parts and octylphenol polyoxyethylene ether (CA-630) nonionic emulsifier 0.6 Part; The emulsifier for the continuous reaction is specifically 0.8 parts of reactive anionic emulsifier of sodium allyl sulfonate (SAS) and 2.4 parts of anionic emulsifier of ethoxylated ether ammonium sulfate EP-110;), 80 parts Deionized water, 0.3 part of ammonium persulfate, 0.2 part of sodium bisulfite, 0.1 part of sodium bicarbonate, 0.03 part of zinc formaldehyde sulfoxylate, 100 parts of vinyl acetate monomer, 20 parts of ethylene, prepare fine Particle size VAE emulsion, the results are as follows:

[0053] ...

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Abstract

The invention relates to vinyl acetate-ethylene copolymer emulsion (VAE emulsion) and a synthesis method thereof. The synthesis method comprises the processes of pre-emulsification, emulsion polymerization reaction, finishing and defoaming. The invention is characterized in that complex emulsifying agents added into a reaction system include a non-ion emulsifying agent, an anion emulsifying agent and a reactive type emulsifying agent. In the synthesis method, the complex emulsifying agents are adopted mainly, the solid content of the produced VAE emulsion is more than or equal to 54.5%, the number average particle size can be less than 0.3mu m, the stability is good and the viscosity is low; the polymerization reaction time is short, the speed is fast, the conversion rate is high, the technique is simple and the industrialization is easy to realize; and the obtained fine-particle-size VAE emulsion is white in color, can be used for industries such as high-end building coatings, paper and textiles, and has wide market.

Description

Technical field: [0001] The invention relates to a vinyl acetate-ethylene copolymer emulsion (hereinafter referred to as VAE emulsion) and a synthesis method thereof, in particular to a fine particle diameter VAE emulsion and a preparation method thereof. technical background: [0002] Vinyl acetate-ethylene copolymer emulsion (VAE emulsion) is a water-dispersed emulsion with excellent performance and wide application. Because vinyl monomer is introduced into the emulsion as the internal plasticizer of the copolymer, the main polymer bond becomes soft, and this This softness is permanent. At the same time, due to the internal plasticization of ethylene, the glass transition temperature and minimum film-forming temperature of the emulsion are reduced, and the polarity of the acetyl group of the VAE molecule enables the copolymer to accommodate a large number of fillers and various additives, which can improve the performance of the VAE emulsion Therefore, it is widely used i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F218/08C08F210/02C08F2/26C08F2/30
Inventor 金勇曹勇成煦张波王宪委叶勇
Owner CHINA PETROCHEMICAL CORP
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