Preparation method of water-borne long-chain acrylate separant

A technology of acrylates and release agents, applied in coatings and other directions, can solve the problems of late start of the theory of mini-emulsion polymerization, and the application field has not been fully developed. Effect

Inactive Publication Date: 2012-09-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the late start of the theory of miniemulsion polymerization and the constraints of preparation conditions, its application field has not been fully developed.

Method used

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  • Preparation method of water-borne long-chain acrylate separant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh raw materials according to the following weight percentages: deionized water 50%, lauryl methacrylate 9.8%, isobornyl acrylate 9.8%, methyl methacrylate 8.2%, butyl acrylate 8.2%, acrylonitrile 5.9% , acrylic acid 5.1%, sodium lauryl sulfate 1%, sodium bicarbonate 1%, ammonium persulfate 0.5%, sodium persulfate 0.5%;

[0032] (2) Add deionized water, lauryl methacrylate, isobornyl acrylate, methyl methacrylate, butyl acrylate, acrylonitrile, acrylic acid, sodium lauryl sulfate, and sodium bicarbonate into a beaker at 50°C Stir for 20min under the condition to prepare the pre-emulsion A;

[0033] (3) Place the pre-emulsion A in an ultrasonic cell pulverizer and emulsify it in an ice-water bath for 5 minutes to prepare the mini-emulsion B;

[0034] (4) Pour the above-mentioned miniemulsion B into a four-necked flask equipped with a stirrer, a condenser, a nitrogen passage, and a thermometer. After raising the temperature to 75°C, add ammonium persulfate and sod...

Embodiment 2

[0038] (1) Weigh raw materials according to the following weight percentages: 50% deionized water, 9.8% lauryl methacrylate, 9.8% octadecyl methacrylate, 8.2% methyl methacrylate, 8.2% butyl acrylate, Styrene 5.9%, acrylic acid 5.1%, sodium dodecyl sulfonate 1%, sodium bicarbonate 1%, sodium persulfate 0.3%, ammonium persulfate 0.5%, potassium persulfate 0.4%;

[0039] (2) Add deionized water, lauryl methacrylate, octadecyl methacrylate, methyl methacrylate, butyl acrylate, styrene, acrylic acid, sodium lauryl sulfonate, carbonic acid Sodium hydrogen, stirred at 50°C for 30 minutes to prepare pre-emulsion A;

[0040] (3) Place pre-emulsion A in an ultrasonic cell pulverizer and emulsify for 5 minutes in an ice-water bath to prepare fine emulsion B;

[0041] (4) Pour the above microemulsion B into a four-neck flask equipped with a stirrer, a condenser, a nitrogen passage, and a thermometer. After heating up to 80°C, add sodium persulfate, ammonium persulfate and potassium pers...

Embodiment 3

[0044] (1) Weigh raw materials according to the following weight percentages: 60% deionized water, 11% lauryl methacrylate, 12.5% ​​octadecyl acrylate, 8.6% butyl acrylate, 5.9% styrene, 1.1% acrylic acid, ten Hexaalkyl sodium sulfate 0.3%, sodium bicarbonate 0.3%, ammonium persulfate 0.3%;

[0045] (2) Add in a beaker, deionized water, lauryl methacrylate, stearyl acrylate, butyl acrylate, styrene, acrylic acid, sodium cetyl sulfate, sodium bicarbonate, at 45 ° C Stir for 35min to prepare pre-emulsion A;

[0046] (3) Place the pre-emulsion A in an ultrasonic cell pulverizer and emulsify it in an ice-water bath for 5 minutes to prepare the mini-emulsion B;

[0047] (4) Pour the above-mentioned miniemulsion B into a four-necked flask equipped with a stirrer, a condenser, a nitrogen passage, and a thermometer. After heating up to 85°C, add ammonium persulfate and keep it warm for 7 hours to obtain a long-chain acrylate release agent. .

[0048] The method for testing the rele...

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Abstract

The invention discloses a preparation method of a water-borne long-chain acrylate separant. The method comprises the following steps: (1) adding a monomer, an emulsifying agent and the initiator into deionized water, pre-emulsifying at a constant temperature between 40 and 50 DEG C for 20 to 40 minutes to obtain a pre-emulsion; (2) performing ultrasonic emulsification on the pre-emulsion obtained in the step (1) to obtain a fine emulsion; and (3) pouring the fine emulsion obtained in the step (2) into a reactor, and reacting at a constant temperature between 75 and 85 DEG C for 6 to 7 hours to obtain the water-borne long-chain acrylate separant. According to the method, the crylic acid long-chain alkyl ester has strong hydrophobicity and the function of assisting emulsion, and other assistant emulsions are not added. The water-borne separant prepared by using the method has no silicon, low transfer possibility, good stability, high transformation rate and excellent separation effect. Furthermore, the water-borne separant has the advantages that raw materials are easy to prepare, the preparation process is simple, VOC (volatile organic compounds) emission amount is extremely low and environmental-friendliness effect is achieved.

Description

technical field [0001] The invention relates to a water-based release agent, in particular to a preparation method of a water-based long-chain acrylate release agent. Background technique [0002] With the increasing awareness of environmental protection, solvent-based coatings with high VOC content can no longer meet the needs of human daily life and production. Water-based coatings have become an inevitable trend in the development of coatings. [0003] Release agent is one of the key materials for the production of pressure-sensitive adhesive tape and self-adhesive products, and its performance directly affects the quality and use effect of pressure-sensitive adhesive tape and self-adhesive products. Water-based release agents can be divided into water-based silicone release agents, water-based fluorine-containing release agents, and water-based long-chain acrylate release agents according to their main components. Although the water-based silicone release agent has exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F220/46C08F212/08C08F2/26C09D133/08C09D133/10
Inventor 涂伟萍王爱丽胡剑青王锋
Owner SOUTH CHINA UNIV OF TECH
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