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A kind of high-viscosity polyvinyl acetate emulsion and preparation method thereof

A technology of polyvinyl acetate emulsion and vinyl acetate monomer, which is applied in the field of polyvinyl acetate emulsion and its preparation, can solve problems that are difficult to eliminate, affect the appearance of latex white glue, affect the environmental protection and performance of latex white glue, and achieve easy operation, Easy to industrialized production, the effect of low conditions

Active Publication Date: 2015-08-05
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general industries, ordinary viscosity emulsion glue can meet the requirements of use, but in some special industries, such as photo frames and other decorative industries, ordinary viscosity emulsion glue cannot meet the requirements of use. However, such methods will not only affect the environmental protection and performance of latex, but also produce a large number of bubbles that are difficult to eliminate, which will affect the appearance of latex.

Method used

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  • A kind of high-viscosity polyvinyl acetate emulsion and preparation method thereof
  • A kind of high-viscosity polyvinyl acetate emulsion and preparation method thereof
  • A kind of high-viscosity polyvinyl acetate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of high viscosity polyvinyl acetate emulsion is as follows:

[0027] Add 428.0g deionized water into the four-neck flask, add 25.0g PVA1788, 50.0g PVA1792, 2.1g emulsifier X-100, 1.0g sodium bicarbonate, 2.0g polyethylene glycol 400 (PEG-400) under stirring , heated up to 80°C. The initiator was prepared with 65.0 g deionized water and 1.3 g potassium persulfate. After dissolving for 1 hour, add 25.0 g of initiator to the reaction bottle, drop 420.0 g of vinyl acetate monomer and initiator, and react for about 4 hours. Add the remaining 10.0 g of initiator within 15 minutes, then keep the temperature at 85°C for 1 hour, lower the temperature, wait until the temperature drops to 40°C, add 40.0g of dibutyl phthalate, stir evenly, and discharge. The viscosity of the synthesized polyvinyl acetate emulsion measured at 25°C (LVGT viscometer 4# rotor 1.5rpm) was 280000mpa·s.

Embodiment 2

[0029] A kind of preparation method of high viscosity polyvinyl acetate emulsion is as follows:

[0030] The reaction raw materials are: 426.8g deionized water, 40.0g PVA2488, 10.0g polyvinylpyrrolidone, 2.1g emulsifier X-100, 1.0g sodium bicarbonate, 65.0g deionized water and 1.3g potassium persulfate to prepare the initiator, acetic acid Vinyl ester monomer 420.0g, dioctyl phthalate 42.0g. The reaction process is the same as in Example 1, and the viscosity of the synthesized polyvinyl acetate emulsion is 220000mpa·s.

Embodiment 3

[0032] A kind of preparation method of high viscosity polyvinyl acetate emulsion is as follows:

[0033] The reaction raw materials are: 427.0g deionized water, 25.0g PVA2488, 25.0g PVA1788, 3.0g Tween-60, 1.7g Span-60, 1.0g sodium bicarbonate, 40.0g deionized water and 1.0g sodium tartrate, 40.0 g deionized water and 3.0 g hydrogen peroxide (the mass concentration of hydrogen peroxide is 27.5%) are prepared as a redox initiator, 420.0 g of vinyl acetate monomer, and 22.0 g of dibutyl phthalate. The reaction process is the same as in Example 1, and the viscosity of the synthesized polyvinyl acetate emulsion is 250000mpa·s.

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Abstract

The invention relates to a high viscosity polyvinyl acetate emulsion. The high viscosity polyvinyl acetate emulsion is characterized in that: the emulsion is prepared from the following raw materials, wherein the raw materials comprise a vinyl acetate monomer, an emulsifying agent and protective colloid; the emulsifying agent is the non-ionic emulsifying agent, and the protective colloid is polyvinyl alcohol. According to the present invention, the viscosity of the high viscosity polyvinyl acetate emulsion exceeds 200000 mpa.s; after the high viscosity polyvinyl acetate emulsion is uniformly mixed with the cellulose and the filler, the resulting mixture is coated on the woodworking decorative sheet material, the coated material has advantages of good initial adhesion, no foaming, no cracking, high strength and the like; the high viscosity polyvinyl acetate emulsion of the present invention provides significant application effects for photo frame and other decorative industries with high emulsion viscosity requirements.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polyvinyl acetate emulsion and a preparation method thereof. technical background [0002] Polyvinyl acetate emulsion is also called white latex or latex white glue. It has the advantages of low price, convenient use, non-toxic and pollution-free, and good viscosity. As an adhesive, it has been widely used in paper processing, wood processing, construction and coatings, etc. industry. Its main raw materials are vinyl acetate, water, initiators, protective colloids, emulsifiers, pH regulators and plasticizers. In general industries, ordinary viscosity emulsion glue can meet the requirements of use, but in some special industries, such as photo frames and other decorative industries, ordinary viscosity emulsion glue cannot meet the requirements of use. However, such methods will not only affect the environmental protection and performance of latex, but also produce a large num...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L31/04C08K5/12C08F118/08C08F2/30C09J131/04
Inventor 吴江红戴祖贵罗丽华
Owner CHINA PETROCHEMICAL CORP
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