Synthetic method of transparent water-resistant whitening polyacrylate emulsion

A technology of polyacrylate emulsion and synthesis method, which is applied in the directions of coating, paper coating, textile and paper making, etc., can solve the problems of complex polymerization process and difficult control of polymerization process, and achieve the effect of improving water resistance.

Inactive Publication Date: 2016-05-04
SHANGHAI CHENGYING NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts the monomer pre-emulsified core-shell polymerization process, the polymerization process is complicated, and the polymerization process is not easy to control when silicone monomer is added.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The synthetic method of the transparent water-resistant whitening polyacrylate emulsion of the present embodiment comprises the steps:

[0027] Step A, add 1Kg allyloxy polyoxyethylene ether ammonium sulfate, 1Kg methacrylic acid, 20Kg butyl acrylate, 20Kg methyl methacrylate, 2Kg hydroxyethyl acrylate into the mixing tank and stir for more than 30 minutes to prepare emulsification The mixed solution of agent and monomer is set aside.

[0028] Step B. Add 50Kg of deionized water into the reactor, raise the temperature, and control the temperature at 78-82°C. Add 0.1Kg potassium persulfate, stir for 5 minutes, directly dropwise add the monomer solution containing emulsifier, dropwise for 2 to 5 hours, after dropping the monomer mixture for 30 minutes, add dropwise 0.1Kg potassium persulfate initiator Solution, the time of dropping is 3 hours, the reaction temperature is controlled at 80-85°C, and the temperature is kept for 0.5 hours.

[0029] Step C. After the heat pr...

Embodiment 2

[0031] The synthetic method of the transparent water-resistant whitening polyacrylate emulsion of the present embodiment comprises the steps:

[0032] Step A, add 2Kg allyloxy nonylphenol polyoxyethylene ether ammonium sulfate, 1Kg acrylic acid, 1Kg 2-ethylhexyl acrylate, 20Kg styrene, 20Kg butyl acrylate, 2Kg hydroxyethyl acrylate to the pre-emulsification Stir in the kettle for more than 30 minutes to prepare a mixed solution of emulsifier and monomer, and set aside.

[0033] Step B. Add 50Kg of deionized water into the reactor, raise the temperature, and control the temperature at 78-82°C. Add 0.1Kg potassium persulfate, stir for 5 minutes, directly dropwise add the monomer solution containing emulsifier, dropwise for 2 to 5 hours, after dropping the monomer mixture for 30 minutes, add dropwise 0.1Kg potassium persulfate initiator Solution, the time of dropping is 3 hours, the reaction temperature is controlled at 80-85°C, and the temperature is kept for 0.5 hours.

[003...

Embodiment 3

[0036] The synthetic method of the transparent water-resistant whitening polyacrylate emulsion of the present embodiment comprises the steps:

[0037] Step A, 2.5Kg allyloxypolyoxyethylene ether ammonium sulfate, 2.5Kg allyloxypolyoxyethylene ether, 11.8Kg butyl acrylate, 10Kg methacrylic acid, 4Kg styrene, 6Kg methyl methacrylate, Add it into the mixing tank and stir for more than 30 minutes to prepare a mixed solution of emulsifier and monomer, and set it aside.

[0038] Step B. Add 60Kg of deionized water into the reactor, raise the temperature, and control the temperature at 78°C. Add 1Kg of ammonium persulfate, stir for 5 minutes, and directly drop the monomer solution containing emulsifier for 3 hours. 30 minutes after the monomer mixture was added dropwise, 2Kg of potassium persulfate initiator solution was added dropwise for 3 hours, the reaction temperature was controlled at 80° C., and the temperature was kept for 0.8 hours.

[0039] Step C. After the heat preserva...

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Abstract

The invention discloses a synthetic method of a transparent water-whitening resistant polyacrylate emulsion. The synthetic method is as follows: uniformly mixing an emulsifier, a soft monomer, a hard monomer and a functional monomer to obtain a monomer mixed liquor containing the emulsifier; adding deionized water in a reactor, heating to a preset temperature, adding 30wt%-50wt% of an initiator, stirring for 5min, dropping the monomer mixed liquor, dropping for 2-5h; after the monomer mixed liquor is added for 30min, dropping the rest of the initiator, dropping for 2-5h, controlling the reaction temperature to be 70-90 DEG C, keeping warm for 0.5-1 h; cooling to 60 DEG C, adding tert-butyl hydroperoxide and sodium formaldehyde sulfoxylate, continuing to react for 0.5h, cooling to 45 DEG C, and adding ammonium hydroxide for adjusting the pH value to be 6-8. According to the synthetic method, a monomer pre-emulsification step is omitted in an emulsion polymerization process, the operation is simpler, the energy consumption is reduced, the work efficiency is improved, and at the same time, the emulsion has excellent performances and a good water-whitening resistant characteristic.

Description

technical field [0001] The invention relates to a synthesis method of polyacrylate emulsion, in particular to a synthesis method of transparent water-resistant white polyacrylate emulsion. Background technique [0002] Aluminized paper has the advantages of unique metallic luster, printing adaptability, and recyclability, and is widely used in various packaging materials such as food, tobacco, alcohol, daily necessities, and gifts. The process of direct vacuum aluminized paper is to pre-coat a layer of aluminized coating on the surface of the paper, and after drying to form a film, put the paper in a vacuum aluminized machine, directly aluminize the surface, and finally coat the vacuum aluminized coating Apply a colored or protective layer. [0003] The traditional emulsion polymerization method is to use a non-polymerizable emulsifier as the emulsifier for synthesis. The monomer is pre-emulsified and then added dropwise to a reactor with or without seed emulsion for polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F218/08C08F216/14C08F216/20C08F2/30C08F2/26D21H19/20
Inventor 虞明东王玉春谢允斌
Owner SHANGHAI CHENGYING NEW MATERIALS
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