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Preparation method of polycarbonate-polyacrylate dispersion

A technology of polyacrylate and polycarbonate, applied in the direction of coating, etc., can solve the problem that polyacrylate resin cannot be prepared, and achieve the effect of improving high temperature resistance

Pending Publication Date: 2020-07-24
东莞市竤穗实业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a kind of preparation method of polycarbonate-polyacrylate dispersion, solved polycarbonate diol as a kind of high-quality raw material but can't prepare the problem of polyacrylate resin

Method used

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  • Preparation method of polycarbonate-polyacrylate dispersion

Examples

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Effect test

Embodiment 1

[0021] A kind of preparation method of polycarbonate-polyacrylate dispersion is:

[0022] 50 parts of diphenyl carbonate, 20 parts of 1,3-propanediol and 0.1 part of tetraethyl titanate were added to a four-necked flask equipped with a thermometer and a rectifying column. 2 Under protection, the mixture was heated to 180°C, and reacted under normal pressure for 2 hours. At the same time, the temperature of the rectification column was controlled at 170°C, and the by-product phenol was evaporated in time. Then the pressure of the reaction system was reduced to 60kPa, and the reaction temperature was reduced to 150°C. Compress poly 4h, drop to room temperature, obtain hydroxyl-terminated polycarbonate;

[0023] Add 80 parts of hydroxyl-terminated polycarbonate, 2 parts of methyl acrylate, and 0.1 parts of sodium methoxide catalyst into a four-necked flask equipped with a spherical condensing reflux tube, water separator, thermometer, and stirrer, and slowly raise the temperature...

Embodiment 2

[0026] A kind of preparation method of polycarbonate-polyacrylate dispersion is:

[0027] 55 parts of diphenyl carbonate, 25 parts of 1,4-butanediol and 0.2 part of tetraethyl titanate were added to a four-necked flask equipped with a thermometer and a rectifying column, and the 2 Under protection, the mixture was heated to 185°C, and reacted under normal pressure for 2.5 hours. At the same time, the temperature of the rectification column was controlled at 175°C, and the by-product phenol was evaporated in time. Compress poly 5h and cool down to room temperature to obtain hydroxyl-terminated polycarbonate;

[0028] Add 90 parts of hydroxyl-terminated polycarbonate, 5 parts of ethyl acrylate, and 0.1 parts of tributyltin acetate catalyst into a four-necked flask equipped with a spherical condensing reflux tube, water separator, thermometer, and stirrer, and slowly raise the temperature to 170°C. transesterification reaction. After reacting for 5 hours until the distilled amo...

Embodiment 3

[0031] A kind of preparation method of polycarbonate-polyacrylate dispersion is:

[0032] 60 parts of diphenyl carbonate, 30 parts of 1,5-pentanediol and 0.3 part of tetrabutyl titanate were added to a four-necked flask equipped with a thermometer and a rectifying column, under N 2 Under protection, the mixture was heated to 190°C, and reacted under normal pressure for 3 hours. At the same time, the temperature of the rectification column was controlled at 180°C, and the by-product phenol was evaporated in time. Compress poly6h and cool down to room temperature to obtain hydroxyl-terminated polycarbonate;

[0033] Add 100 parts of hydroxyl-terminated polycarbonate, 8 parts of 2-methyl methacrylate, and 0.2 parts of tetramethyl zirconate catalyst into a four-necked flask equipped with a spherical condensation reflux tube, water separator, thermometer, and stirrer, slowly Raise the temperature to 180°C to carry out the transesterification reaction, and react for 6 hours until t...

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Abstract

The invention relates to a preparation method of a polycarbonate-polyacrylate dispersion. The problem that polycarbonate diol serving as a high-quality raw material cannot be used for preparing polyacrylate resin is solved. The method provided by the invention comprises the following steps: 1) preparing double-bond-terminated polycarbonate; and 2) preparing the polycarbonate-polyacrylate dispersion. Polycarbonate chain segments are introduced into polyacrylate, so that the defects of insufficient tensile resilience and poor high temperature resistance of the traditional polyacrylic acid emulsion are remarkably improved, and meanwhile, a coating is endowed with excellent solvent resistance, wear resistance, scratch resistance and hydrolysis resistance, and has a wide application prospect onthe surfaces of 3C, woodware, textiles, metals and the like.

Description

technical field [0001] The invention relates to a preparation method of polycarbonate-polyacrylate dispersion. Background technique [0002] In order to respond to the country's policy of protecting the environment, saving resources, and sustainable development, in recent years, the development of water-based coatings has made amazing achievements. Water-based acrylic resin is the most widely used coating polymer material because of its high gloss, excellent corrosion resistance and medium resistance. [0003] Water-based acrylic coatings tend to become sticky at high temperatures and brittle at low temperatures, and there is still a certain gap in performance between them and solvent-based coatings. In order to solve the problems of acrylic coatings, it is usually copolymerized or blended with other polymer materials to improve its performance. [0004] Polycarbonate diol is a class of high-performance polyols with regular molecular structure and strong intermolecular coh...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/14C08F220/06C09D151/08
CPCC08F290/061C09D151/08C08F220/14C08F220/06
Inventor 曹敏兰兴仲
Owner 东莞市竤穗实业投资有限公司
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