A kind of continuous production method of GMA type acrylic resin powder coating

A technology of acrylic resin and production method, which is applied in the direction of powder coating and coating, and can solve the problems of cumbersome preparation process, difficult control of acrylic resin process, easy blockage of pipelines, etc.

Active Publication Date: 2021-09-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a three-stage tubular reaction based on the problems of cumbersome preparation process of the existing GMA powder coatings, many impurities in the product, unfriendly environment, difficult control of the acrylic resin production process of the tubular reactor, and easy blockage of the pipeline. Process for the continuous production of GMA-based acrylic resin powder coatings for devices

Method used

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  • A kind of continuous production method of GMA type acrylic resin powder coating
  • A kind of continuous production method of GMA type acrylic resin powder coating

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of GMA class acrylic resin powder coating in the present embodiment is as follows:

[0029] Step 1: Add 30 parts by mass of GMA, 60 parts by mass of methyl methacrylate, 10 parts by mass of butyl acrylate, 3 parts by mass of azobisisobutyronitrile, and 2 parts by mass of dodecyl mercaptan into the premix tank for mixing Uniform, and then through the high-pressure pump continuously into the tubular reactor for free radical polymerization, in which the tubular reactor is composed of three sections of tubular reactors connected in series, the control temperature is 90°C, 30°C and 150°C in sequence to control the polymerization The concentration of the reactant is 30%, 50% and 70% successively, the pressure in the control reactor is 0.2MPa, the residence time of the control reactant is 6min by adjusting the flow velocity in the tube, and the GMA type acrylic resin solution with a polymer concentration of 70% is prepared.

[0030] Step 2: pump the GMA ...

Embodiment 2

[0033] The preparation method of GMA class acrylic resin powder coating in the present embodiment, comprises the steps:

[0034] Step 1: 25 parts by mass of GMA, 65 parts by mass of acrylic acid, 5 parts by mass of ethyl acrylate, 5 parts by mass of 2-ethylhexyl acrylate, 3 parts by mass of dicumyl peroxide, 1 part by mass of octadecyl The mercaptan is added into the pre-mixing tank and mixed evenly, and then continuously added into the tubular reactor equipped with a static mixing device through a high-pressure pump for free radical polymerization. The temperature is 100°C, 50°C and 130°C in turn, the polymer concentration is controlled to be 40%, 60% and 85% in turn, the pressure in the reactor is controlled to be 0.5MPa, and the flow rate in the tube is adjusted to control the residence time of the reactant to be 5min. A GMA type acrylic resin solution having a polymer concentration of 85% was obtained.

[0035] Step 2: pump the GMA type acrylic resin solution discharged f...

Embodiment 3

[0038] The preparation method of GMA class acrylic resin powder coating in the present embodiment, comprises the steps:

[0039] Step 1: 21 parts by mass of GMA, 36 parts by mass of methacrylic acid, 43 parts by mass of butyl methacrylate, 0.2 parts by mass of di-tert-butyl peroxide, 3 parts by mass of 2,4-diphenyl-4-methyl -1-Pentene is added to the pre-mixing tank and mixed evenly, and then continuously added to the tubular reactor through a high-pressure pump for free radical polymerization, wherein the tubular reactor is composed of three sections of tubular reactors connected in series, and the temperature is controlled in sequence: 120°C, 60°C and 120°C, control the polymer concentration to 40%, 70% and 85% in turn, control the pressure in the reactor to 1MPa, adjust the flow rate in the tube to control the residence time of the reactant to 4min, and obtain the polymer concentration 85% GMA type acrylic resin solution.

[0040] Step 2: pump the GMA type acrylic resin so...

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Abstract

The invention discloses a continuous production method of GMA-type acrylic resin powder coatings. According to the free radical polymerization characteristics of the resin, three-stage series tubular reactors are designed to carry out the polymerization of GMA-type acrylic resin, wherein the reaction temperature lowered in the second stage can be To avoid the occurrence of gel effect, a higher reaction temperature in the third stage can reduce the viscosity of the system to facilitate flow, shorten the reaction time and improve production efficiency. The product enters the intermeshing twin-screw extruder to continue to react, devolatilize, extrude and granulate, and then prepare GMA-based acrylic resin powder coating according to the powder coating preparation process. The resin polymerization stage of the present invention is a homogeneous polymerization system. On the one hand, the monomer and the polymer in the tubular reactor have good compatibility, which is beneficial to reduce the gel effect; on the other hand, the unreacted monomer acts as a polymer The solvent also increases the fluidity of the system and ensures that the system is solvent-free.

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials and chemical industry, and in particular relates to a continuous production method of GMA-based acrylic resin powder coatings. Background technique [0002] Powder coating has the characteristics of solvent-free, energy saving and environmental protection, and is a "green coating" promoted by the country. Acrylic resin powder coating is a kind of high decorative and high weather resistance coating, which has the characteristics of good leveling, good film fullness, excellent gloss and color retention, high mechanical strength, excellent scratch resistance, and It has excellent corrosion resistance and outdoor durability, and can be widely used in high-end decorative fields such as surface coating of automobiles and home appliances. [0003] Acrylic powder coatings mainly include hydroxyl type acrylic acid, carboxyl type acrylic acid and glycidyl type (GMA) acrylic powder coatings...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/32C08F220/14C08F220/18
CPCC08F212/08C08F220/14C09D5/03C09D125/14C09D133/14C08F220/1804C08F220/325C08F220/1802C08F220/1808
Inventor 汪瑾付涛朱刘
Owner HEFEI UNIV OF TECH
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