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

A technology of ethylene copolymer emulsion and vinyl acetate, applied in the field of fine particle size VAE emulsion and its preparation, can solve the problems of not meeting market needs, etc., and achieve the effects of high speed, high conversion rate and low viscosity

Active Publication Date: 2011-04-27
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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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 reaction kettle, start stirring, mix well and raise the temperature, add 0.1 part of sodium bisulfite to make it completely dissolve; wherein the emulsifier for initial reaction Specifically, 0.5 parts of reactive anionic emulsifier of sodium vinyl sulfonate SVS, 1.7 parts of anionic emulsifier of sodium dodecylbenzene sulfonate DS-10 and non-ionic emulsifier of nonylphenol polyoxyethylene ether Co-887 0.3 copies.

[0040] (2) Add 0.1 part of ammonium persulfate and 1.5 parts of deionized water to the initial initiator tank and stir for 15 minutes to prepare the initial initiator solution. Add 0.2 part of ammonium persulfate, 0.1 part of sodium bicarbonate, and 2.0 to the continuous initiator tank. Parts of emulsifier for continuous reaction and 8 parts of deionized water are stirred for 20 minutes to prepare continuous initiator solution fo...

Embodiment 2

[0048] Take 5.2 parts of emulsifier (including 2.8 parts of emulsifier for initial reaction, 2.4 parts of emulsifier for continuous reaction; wherein the emulsifier for initial reaction is specifically 0.6 parts of reactive anionic emulsifier of sodium vinyl sulfonate (SVS), 1.7 parts of sodium dodecylbenzene sulfonate (DS-4AP) anionic emulsifier and 0.5 parts of non-ionic emulsifier of octylphenol polyoxyethylene ether (X-305);

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

[0050] ...

Embodiment 3

[0052] Take 7 parts of emulsifier (including 3.8 parts of emulsifier for initial reaction, 3.2 parts of emulsifier for continuous reaction; wherein the emulsifier for initial reaction is specifically allyloxynonylphenol polyoxyethylene (10) ether ammonium sulfate ( DNS-86) reactive anionic emulsifier 0.8 parts, sodium dodecylbenzene sulfonate (DS-4AP) anionic emulsifier 2.4 parts and octylphenol polyoxyethylene ether (CA-630) nonionic emulsifier 0.6 Parts; the emulsifier for continuous reaction is specifically 0.8 parts of reactive anionic emulsifier of sodium allyl sulfonate (SAS) and 2.4 parts of anionic emulsifier of ethoxy ether sulfate ammonium salt EP-110;), 80 parts Deionized water, 0.3 parts of ammonium persulfate, 0.2 parts of sodium bisulfite, 0.1 parts of sodium bicarbonate, 0.03 parts of zinc formaldehyde sulfoxylate, 100 parts of vinyl acetate monomer, 20 parts of ethylene, prepared by the method of Example 1 Particle size VAE emulsion, the results are as follows: ...

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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 size VAE emulsion and a preparation method thereof. technical background: [0002] Vinyl acetate-ethylene copolymer emulsion (VAE emulsion) is a water-dispersible emulsion with excellent performance and wide range of uses. The introduction of ethylene monomer as the internal plasticizer of the copolymer in the emulsion makes the main bond of the polymer soft and this This softness is permanent. At the same time, due to the internal plasticizing effect 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 contain a large amount of fillers and various additives, which can improve the performance of the VAE emulsion. , So it is widely used in adhes...

Claims

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Application Information

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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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