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A kind of organic small molecule hybrid acrylate interpenetrating network emulsion and its preparation method and application

An acrylate, interpenetrating network technology, applied in coatings and other directions, can solve the problems of long reaction time period, insignificant increase in damping temperature range, and unsatisfactory damping temperature range expansion.

Active Publication Date: 2021-10-22
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN109942756A discloses "a styrene-acrylic emulsion with a gradient damping structure and a bakeable thick build water-based damping coating and its preparation", which adopts a power-level feeding method to prepare latex particles, and the distribution of styrene from the inside to the outermost layer presents a gradient change, and aims to increase the damping temperature range through the gradient change of the latex particle structure, but the expansion of the damping temperature range is not ideal, and the experimental operation is complicated, and the reaction time period is relatively long, which is not conducive to the actual application of the factory
Chinese patent CN102408792A discloses "water-based damping paint for vehicles", which achieves the purpose of widening the damping temperature range by blending two kinds of acrylate emulsions with different glass transition temperatures, but the damping factor is reduced, and the increase in the damping temperature range is not obvious

Method used

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  • A kind of organic small molecule hybrid acrylate interpenetrating network emulsion and its preparation method and application
  • A kind of organic small molecule hybrid acrylate interpenetrating network emulsion and its preparation method and application
  • A kind of organic small molecule hybrid acrylate interpenetrating network emulsion and its preparation method and application

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preparation example Construction

[0047] The present invention also provides a method for preparing the organic small molecule hybrid acrylate interpenetrating network emulsion described in the above technical solution, comprising the following steps:

[0048] mixing the core monomer, the first cross-linking agent, the first hindered phenol, the emulsifier and part of the water for pre-emulsification to obtain a pre-emulsion;

[0049] Adding a first initiator and a pH buffer to the pre-emulsion to carry out a first polymerization reaction to obtain a nuclear emulsion;

[0050] Adding a second initiator, a shell monomer, a second hindered phenol and a second crosslinking agent into the core emulsion to carry out a second polymerization reaction to obtain the organic small molecule hybrid acrylate interpenetrating network emulsion.

[0051] In the present invention, the core monomer, the first cross-linking agent, the first hindered phenol, the emulsifier and part of water are mixed for pre-emulsification to obt...

example 1

[0068] Step 1: Weigh 7.5g of styrene, 7.5g of methyl methacrylate, 0.45g of divinylbenzene and 0.75g of hindered phenol HP-235 and disperse them into a homogeneous mixture in an Erlenmeyer flask with ultrasonic waves. Alkyl sodium sulfate, 0.2 g of alkylphenol polyoxyethylene, and 55 g of distilled water were poured into a four-necked flask and pre-emulsified in a water bath at 70° C. for 30 minutes under the protection of nitrogen to obtain a pre-emulsion.

[0069] Step 2: Dissolve 0.075g of potassium persulfate and 0.2g of sodium carbonate in 10g of water, pour them into a four-neck flask to initiate the first polymerization reaction, and react at 70°C for 150min to obtain a nuclear emulsion.

[0070] Step 3: Dissolve 0.175g of potassium persulfate in 10g of distilled water, then pour into the nuclear emulsion, 17.5g of butyl acrylate, 17.5g of isooctyl acrylate, 1.75g ​​of HP-235 and 1.05g of diethylene The benzene mixture was placed in an Erlenmeyer flask, and the mixture ...

example 2

[0072] Step 1 is the same as Example 1, wherein changing the amount of hindered phenol HP-235 is 1.5g;

[0073] Step 2 is the same as example 1;

[0074] Step 3 is the same as Example 1, wherein the amount of hindered phenol HP-235 is changed to 3.5g.

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Abstract

The invention provides an organic small molecule hybrid acrylate interpenetrating network emulsion, a preparation method and application thereof. The present invention uses methyl methacrylate and styrene copolymer as the core structure, and butyl acrylate and isooctyl acrylate copolymer as the shell structure to form a cross-linked interpenetrating network, which effectively increases the damping temperature range of the acrylate emulsion; at the same time , the hindered phenol is loaded in the core layer and the shell layer, and the phenolic hydroxyl group in the hindered phenol forms a hydrogen bond with the ester group on the acrylate macromolecule, which effectively improves the loss factor; thereby playing a synergistic effect, effectively improving the damping performance, making the It can be used in damping paints. The preparation method of the emulsion provided by the invention is simple and has no pollution to the environment. The data of the examples show that the temperature range of the small organic molecule hybrid acrylate interpenetrating network emulsion provided by the present invention is 64-133° C., and the loss factor is 0.48-0.95.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an organic small molecule hybrid acrylate interpenetrating network emulsion and a preparation method and application thereof. Background technique [0002] With the development of today's science and technology, large-scale machines are used more and more widely, and the noise generated by these machines is becoming more and more serious. These noises not only endanger the environment, but also cause considerable damage to human health. , so shock-resistant and noise-reducing damping coatings are gradually developed. [0003] The working principle of the damping coating is to use the damping coating to dissipate the sound wave mechanical energy generated by the external noise in the form of heat energy during deformation, so as to reduce vibration, suppress noise and increase the service life of the machine. Damping coatings have been used in many fields, including ships, aeros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/08C08L25/14C08L33/12C08F220/14C08F212/08C08F220/18C09D133/08C09D125/14C09D133/12
CPCC08F212/08C08F220/14C08F220/18C08L33/08C08L2205/02C08L2205/04C09D125/14C09D133/08C09D133/12C08L25/14C08L33/12
Inventor 周超王喆张帅刘思彤张浩刘堂宇洪成宇
Owner CHANGCHUN UNIV OF TECH