Preparation method of polyester grafted polyacrylate polymer for transparent powder coating

A polyacrylate, powder coating technology, applied in powder coatings, coatings, etc., can solve the problem of affecting the decorative performance of the coating film, the easy whitening of the coating film, the leveling of the coating film, the clarity, the high humidity and heat resistance, and the inability to meet the market. needs, etc.

Active Publication Date: 2021-09-10
宁波中南联创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing technology mostly uses polyether flow aids, which can no longer meet the needs of the market in terms of coating film leveling, cl

Method used

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  • Preparation method of polyester grafted polyacrylate polymer for transparent powder coating
  • Preparation method of polyester grafted polyacrylate polymer for transparent powder coating
  • Preparation method of polyester grafted polyacrylate polymer for transparent powder coating

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preparation example Construction

[0025] Provided in the embodiment of the present invention: a preparation method of polyester grafted polyacrylate polymer for transparent powder coatings, comprising the following steps:

[0026] The first step: according to the mass ratio of acrylate:glycidyl methacrylate=97-98.8:1.2-3, prepare acrylate, glycidyl methacrylate, solvent, initiator, and polyester for use; Among them, the acrylate is any one or more of butyl acrylate, methyl acrylate, and isooctyl acrylate; the solvent is any one of toluene, xylene, and cyclohexanone; the polyester is Sino-French P9336 , any one of P9335 but not limited to these two polyesters; the initiator is a mixture of any one or more of azobisisobutyronitrile and BPO, and the dosage is 1.5%-4.5% of the monomer mass;

[0027] S2: In a three-necked flask equipped with a stirrer, a thermometer, a reflux condenser, a two-port connecting pipe, and a constant pressure dropping funnel, add the solvent to the three-necked flask, and then add glyci...

Embodiment 1

[0038] In a three-neck flask equipped with a stirrer, a thermometer, a reflux condenser, a two-port connecting pipe, and a constant pressure dropping funnel, add 100 g of solvent toluene as a base, and dropwise add 98.5 g of acrylate, Mixed monomer solution of 1.5g of glycidyl methacrylate and 2.5g of initiator, dropwise for 3h, keep warm at 100-105°C for 2h; evacuate and cool to obtain leveling agent; 1. Add 100g of solvent to the three-necked flask of the reflux condenser, raise the temperature to 100-110°C, dissolve 99g of polyester in the solvent, add 1g of leveling agent dropwise, the suitable temperature is 100-110°C, and the reaction time is 3-5h. After the reaction, vacuumize to obtain the target product.

Embodiment 2

[0040] In a three-necked flask equipped with a stirrer, a thermometer, a reflux condenser, a two-port connecting pipe, and a constant pressure dropping funnel, add 100 g of solvent xylene as a base, and dropwise add 98.5 g of acrylate at a temperature of 110-115 ° C , a monomer solution mixed with 1.5g of glycidyl methacrylate and 2.5g of initiator; the dropwise addition time is 3h, and it is kept at 110-120°C for 2h; vacuumized and cooled to obtain a leveling agent; Add 100g of solvent to the three-necked flask with thermometer and reflux condenser, raise the temperature to 100-110°C, dissolve 99g of polyester in the solvent, add 1g of leveling agent dropwise, the suitable temperature is 130-135°C, and the reaction time is 3-5h , after the reaction, vacuumize to obtain the target product.

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Abstract

The invention discloses a preparation method of a polyester grafted polyacrylate polymer for a transparent powder coating, which comprises the following steps of: proportioning acrylate and glycidyl methacrylate by a certain mass ratio, adding a solvent into a three-neck flask which is provided with a stirrer, a thermometer, a reflux condenser, a two-neck connecting pipe and a constant pressure dropping funnel, dropwise adding a mixed solution of the glycidyl methacrylate, the acrylate and an initiator into the flask at the temperature of 100-130 DEG C, reacting for a period of time, and vacuumizing to obtain a polyacrylate leveling agent; adding a solvent into a three-neck flask provided with a stirrer, a thermometer and a reflux condensing tube, heating to 100-110 DEG C, dissolving polyester into the solvent, dropwise adding the polyacrylate leveling agent, and after finishing reacting, vacuumizing to obtain the products polyester resin, polyester resin grafted polyacrylate and polyacrylate, so that the flatting agent has certain compatibility in a coating film; and the effects of smoothness, transparency and high-humidity-heat environment resistance of the coating film are achieved.

Description

technical field [0001] The invention relates to the technical field of transparent powder coatings, in particular to a method for preparing polyester-grafted polyacrylate polymers for transparent powder coatings. Background technique [0002] With the increasing awareness of environmental protection, the application of powder coatings in the coatings industry is gradually promoted and popularized. Among them, transparent powder coatings are becoming more and more popular in the market due to their excellent decorative properties and outstanding protective properties. Especially in the fields of home decoration (hardware, bathroom), automotive interior and other finishing fields. [0003] However, the existing technology mostly uses polyether flow aids, which can no longer meet the needs of the market in terms of coating film leveling, clarity, and high humidity and heat resistance, especially in high humidity and heat environments. White, affect the decorative performance o...

Claims

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Application Information

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IPC IPC(8): C08F283/02C08F220/10C08F220/32C09D151/08C09D5/03
CPCC08F283/02C09D151/08C09D5/03C08F220/10C08F220/325
Inventor 张云伟
Owner 宁波中南联创科技有限公司
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