Rapid emulsion polymerization method for vinyl acetate

A vinyl acetate and emulsion polymerization technology, applied in the field of rapid emulsion polymerization of vinyl acetate, can solve problems such as unsatisfactory product quality and performance, and achieve the effects of shortened polymerization reaction time, easy operation, and simple equipment

Inactive Publication Date: 2012-10-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industrial preparation of polyvinyl acetate emulsion usually takes 3 to 8 hours, so the existing technology cannot meet the various needs of the market for product quality and performance

Method used

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  • Rapid emulsion polymerization method for vinyl acetate

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Effect test

Embodiment 1

[0012] The method for preparing the polyvinyl acetate emulsion by rapid triggering of the potassium persulfate complex comprises the steps:

[0013] 1) Preparation of potassium persulfate complex solution: add 0.2 parts of potassium persulfate to a 250mL beaker, add 10 parts of deionized water to make a 2% potassium persulfate aqueous solution; add 0.01 part of silver nitrate to a 250mL beaker, add 5 1 part of deionized water, after dissolving, add 0.2 part of ammonia water with a mass percentage concentration of 25-28% and mix evenly to form a silver-ammonia solution;

[0014] 2) Potassium persulfate complex quickly initiates vinyl acetate emulsion polymerization: In a reaction kettle with a thermometer, stirring and reflux device, add 15 parts of 16.7% polyvinyl alcohol 17-88 aqueous solution and 44.5 parts of deionized water respectively, Add 1.5 parts of emulsifier OP-10, add 24 parts of vinyl acetate, start to stir and mix evenly, then gradually raise the temperature to...

Embodiment 2

[0018] Initiate the method for preparing polyvinyl acetate emulsion quickly by ammonium persulfate compound, it comprises the steps:

[0019] 1) Preparation of ammonium persulfate complex solution: Add 0.2 parts of ammonium persulfate to a 250mL beaker, add 10 parts of deionized water to make a 2% ammonium persulfate aqueous solution; add 0.01 part of silver nitrate to a 250mL beaker, add 5 1 part of deionized water, after dissolving, add 0.2 part of ammonia water with a mass percentage concentration of 25-28% and mix evenly to form a silver ammonia solution;

[0020] 2) The ammonium persulfate compound quickly initiates the emulsion polymerization of vinyl acetate: In a reaction kettle with a thermometer, stirring and reflux device, add 12 parts of 16.7% polyvinyl alcohol 17-88 aqueous solution and 52 parts of deionized water, Add 1 part of emulsifier OP-10, add 20 parts of vinyl acetate, start to stir and mix evenly, then gradually raise the temperature to 65°C, add the am...

Embodiment 3

[0023] The method for preparing the polyvinyl acetate emulsion by rapid triggering of the potassium persulfate complex comprises the steps:

[0024] 1) Preparation of potassium persulfate complex solution: add 0.2 parts of potassium persulfate to a 250mL beaker, add 10 parts of deionized water to make a 2% potassium persulfate aqueous solution; add 0.01 part of silver nitrate to a 250mL beaker, add 5 1 part of deionized water, after dissolving, add 0.2 part of ammonia water with a mass percentage concentration of 25-28% and mix evenly to form a silver ammonia solution;

[0025] 2) Potassium persulfate complex quickly initiates vinyl acetate emulsion polymerization: In a reaction kettle with a thermometer, stirring and reflux device, add 12 parts of 16.7% polyvinyl alcohol 17-88 aqueous solution and 52 parts of deionized water, Add 1 part of emulsifier OP-10, add 20 parts of vinyl acetate, start to stir and mix evenly, then gradually raise the temperature to 45°C, add the pot...

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Abstract

The invention relates to a rapid emulsion polymerization method for vinyl acetate. The method comprises the followings steps of: adding 10-15 parts by mass of 16.7 percent polyvinyl alcohol, 17-88 parts by mass of an aqueous solution, 37-52 parts by mass of deionized water, 0.5-2 parts by mass of octyl phenol polyoxyethylene ether and 15-40 parts by mass of vinyl acetate into a reaction kettle with a thermometer and a stirring and reflowing device; stirring and mixing uniformly, and gradually heating to 45-70 DEG C; adding a persulfate aqueous solution and a silver ammonia solution respectively; reacting at the temperature of 45-70 DEG C for 20-45 minutes; and naturally cooling to the room temperature after finishing the reaction to obtain a milky white blueing light-stable vinyl acetate emulsion. The method has the beneficial effects: operation is easy, equipment is simple, polymerization temperature control conditions are reduced, the lowest reaction temperature can be lowered to 45 DEG C, and the polymerization reaction time can be shortened to 20-45 minutes.

Description

technical field [0001] The invention relates to a method for rapid emulsion polymerization of vinyl acetate. Background technique [0002] As a water-based adhesive, polyvinyl acetate emulsion (commonly known as white latex) is widely used in shoe material processing, wood processing, Fabric bonding, furniture assembly, packaging materials, building decoration and many other fields have become a bulk product in the adhesive industry. The domestic production of polyvinyl acetate emulsion is second only to urea-formaldehyde resin adhesive, ranking second in the production and application of adhesives. With the rapid development of the national economy, its consumption will increase substantially. The industrial preparation of polyvinyl acetate emulsion usually takes 3-8 hours, so the existing technology cannot meet the various demands of the market on the quality and performance of the product. Contents of the invention [0003] The technical problem to be solved by the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F118/08C08F2/30
Inventor 巫辉袁爱丽
Owner WUHAN UNIV OF TECH
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