Polyester modified aqueous acrylic resin, preparation method thereof, and application thereof in varnish

A water-based acrylic and polyester modification technology, applied in the direction of coating, can solve the problems of difficult acquisition of raw materials, no introduction of water-based acrylic resin synthesis, high cost, and achieve the effects of low cost, high fullness, and easy raw materials

Active Publication Date: 2017-05-31
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the BoltornTM series of dendritic hyperbranched polyesters used in this process are produced by Perstorp, Sweden, and the raw materials are not easy to obtain and the cost is high.
[0004] Chinese patent CN 103333570 A discloses a water-based finish varnish, which is composed of water-based acrylic resin, curing agent, substrate wetting agent, thickener, pH regulator, co-solvent and water, but the patent does not introduce water-based Synthesis of Acrylic Resin

Method used

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  • Polyester modified aqueous acrylic resin, preparation method thereof, and application thereof in varnish
  • Polyester modified aqueous acrylic resin, preparation method thereof, and application thereof in varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: the preparation of polyester modified waterborne acrylic resin

[0047] 180g ethylene glycol, 1452g neopentyl glycol, 708g 1,4-cyclohexanedicarboxylic acid, 672g isophthalic acid, 335.2g adipic acid and 208.8g fumaric acid, 3.0g dibutyltin dilaurate , put into the reactor that agitator, thermometer, rectifying column, condenser and nitrogen inlet are equipped with, reaction temperature is 230 ℃, pressure 0.11MPa, stirs 10 hours, regulates pressure to-0.095MPa, and reaction temperature is 190 ℃, Stir for 6 hours, take samples to measure acid value and viscosity. React until the acid value is 12mgKOH / g, cool down to 120°C, add 2000g ethylene glycol monobutyl ether to adjust the solid content to 60±2%, and measure the viscosity with a rotational viscometer at 25°C to be 5000-6000mPa.s, the degree of unsaturation (Expressed by iodine value, in terms of non-volatile matter) is 13.5, the glass transition temperature is -20 ℃, and the unsaturated polyester is ob...

Embodiment 2

[0049] Embodiment 2: the preparation of polyester modified waterborne acrylic resin

[0050] 250g neopentyl glycol, 792g 1,4-cyclohexanedimethanol, 200g 1,6-hexanediol, 242g terephthalic acid, 625g adipic acid, 417g isophthalic acid, 150g fumaric acid, 3g Titanate, put into the reaction kettle equipped with stirrer, thermometer, rectification column, condenser and nitrogen inlet, the reaction temperature is 220 ℃, the pressure is 0.11MPa, stir for 10 hours, adjust the pressure to -0.095MPa, the reaction temperature It is 180°C, stir for 5 hours, take a sample to measure the acid value and viscosity, react until the acid value is 18mgKOH / g, cool down to 120°C, add 1450g ethylene glycol monobutyl ether to adjust the solid content to 60±2%, and use a rotary at 25°C The viscosity measured by the viscometer is 3500-5000mPa.s, the degree of unsaturation (indicated by iodine value, in terms of non-volatile matter) is 12.0, and the glass transition temperature is -10°C, and the unsatura...

Embodiment 3

[0052] Embodiment 3: the preparation of polyester modified waterborne acrylic resin

[0053] 320g hexanediol, 700g neopentyl glycol, 600g 1,4-cyclohexanedimethanol, 370g trimellitic anhydride, 100g hexahydrophthalic anhydride, 500g 1,4-cyclohexanedicarboxylic acid, 550g isophthalic acid, 130g cis Butenedioic anhydride, 8g ethylene glycol antimony, put into the reaction kettle equipped with stirrer, thermometer, rectifying column, condenser and nitrogen inlet, the reaction temperature is 250 ℃, the pressure is 0.12MPa, stir for 6 hours, adjust the pressure to -0.095MPa, the reaction temperature is 200°C, stirred for 3 hours, and samples are taken to measure the acid value and viscosity. React until the acid value is 25mgKOH / g, cool down to 120°C, add 1780g ethylene glycol monobutyl ether to adjust the solid content to 60±2%, and measure the viscosity with a rotational viscometer at 25°C to be 1500-3500mPa.s, the degree of unsaturation (Expressed by iodine value, in terms of no...

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Abstract

The invention belongs to the technical field of polyester modified aqueous acrylic resins, and discloses a polyester modified aqueous acrylic resin, a preparation method thereof, and an application thereof in an aluminums section finishing varnish. The polyester modified aqueous acrylic resin is prepared from, by mass, 8-15 parts of unsaturated polyester, 40-55 parts of an acrylate monomer, 28-35 parts of a hydroxyl group-containing acrylate monomer, 6-8 parts of a carboxyl group-containing monomer, 1-3 parts of an initiator and 55-75 parts of a cosolvent. The invention also provides the preparation method of the polyester modified aqueous acrylic resin. The unsaturated polyester and the acrylate chain segment in the polyester modified aqueous acrylic resin have multiple phenyl rings and annular structures and have high refractive index, so the polyester modified aqueous acrylic resin has high glossiness; the unsaturated polyester chain segment adopting an alcohol and acid condensed ester group as a main chain has large toughness, so the prepared coating has excellent impact resistance; and the polyester modified aqueous acrylic resin has high cross-linking active sites and high permeability, and is especially suitable for being used in the aluminums section finishing varnish.

Description

technical field [0001] The invention belongs to the technical field of polyester-modified water-based acrylic resin, and in particular relates to a polyester-modified water-based acrylic resin, a preparation method thereof and an application in aluminum profile varnish. Background technique [0002] Nowadays, there are three main types of coatings widely used on architectural aluminum profiles: electrophoretic paint, fluorocarbon paint and powder paint. Among them, the cost of electrophoretic paint is low, but the energy consumption is large, the pollution is high, the color is single, and the decoration is not high; the advantages of fluorocarbon paint are mainly reflected in its excellent corrosion resistance and weather resistance, and its functionality is greater than its decoration. Solvents are used as diluents, which cause great pollution and high cost prices; powder paints are solvent-free and pollution-free, but have a single color, mainly plain paints such as black...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F220/14C08F212/08C08F220/28C08F220/06C08F220/18C08F222/02C08G63/553C09D151/08
CPCC09D151/08C08F283/01C08G63/553C08F220/1806C08F220/18C08F220/1808C08F220/1804C08F220/281C08F220/1802
Inventor 袁鹏飞邓威谭德满黄光燕
Owner GUANGZHOU HUMAN CHEM
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