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Preparation method and application of bifunctional polyester resin

An ester resin and bifunctional technology, applied in the field of preparation of bifunctional polyester resin, can solve problems such as pollution, poor weather resistance, poor temperature resistance, etc., achieve huge market application prospects, outstanding outdoor performance, and reduce coating pinhole effect

Active Publication Date: 2018-10-16
ZHEJIANG CHAOLANG ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the material and use characteristics of the thermos cup, the powder coating on the surface is likely to cause problems such as poor adhesion, poor temperature resistance, poor water boiling resistance and wear resistance.
[0007] In order to solve the problems of poor weather resistance and poor adhesion of coatings, Chinese patent application 201610226583.9 discloses a water-based transparent weather-resistant coating for thermos cups, the components of which include: 20-50 parts of amino resin, hydroxyacrylic acid 10-30 parts of resin, 2-5 parts of epoxy soybean oil, 5-10 parts of fluorocarbon emulsion, 5-10 parts of styrene-acrylic emulsion, 2-10 parts of nano-pigment, 1.5-3 parts of nano-titanium dioxide, tourmaline powder 1 -2 parts, 1-3 parts of basalt fiber, 15-30 parts of deionized water, 0.5-1 part of coupling agent, 0.5-1.5 parts of other additives, the coating has good weather resistance, good coating performance, strong adhesion, Good color and gloss retention, but the paint uses a variety of emulsions, which contain a certain amount of organic solvents, and the volatilization of organic solvents will cause a certain degree of pollution
[0008] Chinese patent application 201210486310.X discloses the preparation method of water-based environmentally friendly color-changing paint for thermos cups. The weight ratios of the raw material components disclosed are: water acrylic resin 35-45, ethylene glycol monobutyl ether 4-6, n-butanol 4 -6, color changing powder 4-6, glycerin 1-2, diffusing agent MF1-2, silane coupling agent Z60400.2-0.3, dimethyl silicone oil 0.20-0.30, deionized water 40-45, the coating is based on water Thinner, non-toxic and tasteless, strong paint film adhesion, but the paint contains organic solvents such as glycerin, which are volatile and will still have a certain degree of impact on the environment
[0009] Since the existing coatings for thermos cups have a certain degree of impact on the environment, and the coatings have poor boiling and acid and alkali resistance properties, the industry is in urgent need of preparing an environmentally friendly coating that has good boiling, acid and alkali resistance, antibacterial and unsuitable. BPA special powder coating for thermos cup

Method used

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  • Preparation method and application of bifunctional polyester resin
  • Preparation method and application of bifunctional polyester resin
  • Preparation method and application of bifunctional polyester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1 A kind of plane powder coating that is used for thermos cup surface spraying

[0077] Formula: GH-2208 50%, XL552 2.8%, NW-5 2%, Silica Powder 40.5%, GLP588 0.7%, Carbon Black 1%, 701B 0.6%, HY-KYZ01 1.5%, Benzoin 0.4%, PTFE Wax powder 0.5%.

[0078] Preparation method: the specific steps are:

[0079] (1) Take carboxyl-terminated polyester resin, XL552, NW-5, microsilica powder B, GLP588, carbon black, 701B, HY-KYZ01, benzoin and polytetrafluoroethylene wax according to the parts by weight and ratio described in the present invention powder, placed in a high-speed mixer and mixed for 5 minutes to obtain a mixture;

[0080] (2) extruding the mixture obtained in step (1) in a twin-screw melting extruder at a temperature of 100°C to obtain an extrudate;

[0081](3) The extruded material obtained in step (2) is placed in a vertical mill to pulverize, and then passed through a 180-mesh sieve to make a powder product with a particle size (equivalent particle ...

Embodiment 2

[0083] Embodiment 2 A kind of plane powder coating that is used for thermos cup surface spraying

[0084] Formula: GH-2208 60%, XL552 3.2%, NW-5 4%, GA-1 17.7%, GLP588 0.8%, titanium dioxide 7%, iron yellow 1.5%, iron red 2.0%, carbon black 0.2%, 701B 1.0 %, HY-KYZ01 1.6%, benzoin 0.3%, polytetrafluoroethylene wax powder 0.7%.

[0085] Preparation method: the specific steps are:

[0086] (1) Weigh GH-2208, XL552, NW-5, GA-1, GLP588, titanium dioxide, iron yellow, iron red, carbon black, 701B, HY-KYZ01, Benzoin and polytetrafluoroethylene wax powder were placed in a high-speed mixer and mixed for 5 minutes to obtain a mixture;

[0087] (2) extruding the mixture obtained in step (1) in a twin-screw melting extruder at a temperature of 105°C to obtain an extrudate;

[0088] (3) Put the extruded material obtained in step (2) into a vertical mill for pulverization, and pass through a 180-mesh sieve to make a powder product with a particle size (equivalent particle size D50) of 4...

Embodiment 3

[0090] Embodiment 3 A kind of plane powder coating that is used for thermos cup surface spraying

[0091] Formula: GH-2208 70%, T-105M 3.9%, NW-5 4.9%, Silica Powder 8.4%, Modaflow PowderIII / 2000 1.0%, Titanium Dioxide 3%, Iron Yellow 0.6%, Carbon Black 0.4%, WK701 1.0% , DP3329-1 4%, HY-KYZ01 1.5%, benzoin 0.5%, 168 0.3%, PTFE wax powder 0.5%.

[0092] Preparation method: the specific steps are:

[0093] (1) Weigh GH-2208, T-105M, NW-5, silicon micropowder, Modaflow Powder III / 2000, titanium dioxide, iron yellow, carbon black, WK701, DP3329 according to the weight parts and ratios described in the present invention -1. HY-KYZ01, benzoin, 168 and polytetrafluoroethylene wax powder were placed in a high-speed mixer and mixed for 5 minutes to obtain a mixture;

[0094] (2) extruding the mixture obtained in step (1) in a twin-screw melting extruder at a temperature of 110°C to obtain an extrudate;

[0095] (3) The extruded material obtained in step (2) is placed in a vertical ...

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Abstract

The invention discloses bifunctional polyester resin. The bifunctional polyester resin is provided with two functional groups, namely terminal carboxyl groups and terminal hydroxyl groups; the acidityis 10 to 56mgKOH / g, the hydroxyl value is 33 to 53mgKOH / g, the viscosity at the temperature of 200 DEG C is 2,400 to 6,000mPa.s, the number-average molecular weight is 2,000 to 5,000, and the glass-transition temperature is 50 to 65 DEG C. The bifunctional polyester resin is mainly prepared by melting and polymerizing the following components by molar percent: 30 to 60mol% of dihydric alcohol, 35to 50mol% of dicarboxylic acid, 0.05 to 3.5mol% of branching agent, 2 to 20mol% of acidolysis agent, and 0.01 to 0.20mol% of esterifying catalyst. The bifunctional polyester resin has the advantagesthat the comprehensive properties of flatting property, mechanical property, weather-resistant property, water boiling-resistant property, heat-resistant property, solvent-resistant property, heat transfer printing property and the like are excellent. The invention also discloses a preparation method and application of the bifunctional polyester resin.

Description

technical field [0001] The invention belongs to the technical field of polyester resins, and in particular relates to a preparation method and application of a bifunctional polyester resin. Background technique [0002] The carboxyl-terminated polyester resin is cured with TGIC, T-105 and epoxy, and the hydroxyl-terminated polyester resin is cured with blocked isocyanate. The polyester resins of the two systems have their own advantages. After the carboxyl-terminated polyester resin and the curing agent are cured to form a film, the overall performance is relatively balanced, the price is low, and the application is wide; while the hydroxyl-terminated polyester resin has excellent properties after being cured with isocyanate. It has outstanding properties such as leveling, solvent resistance and weather resistance, but due to price and other factors, the polyester resins currently used in the market are mainly carboxyl-terminated polyester resins. However, with the improvem...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/181C09D167/02C09D5/03C09D5/14C09D7/61C09D7/63
Inventor 杨庆伟滕学芳刘军季华斌
Owner ZHEJIANG CHAOLANG ADVANCED MATERIALS
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