Polyester resin for high-temperature-resisting powdered paint and preparation method of polyester resin

A polyester resin, powder coating technology, applied in powder coatings, fire-retardant coatings, polyester coatings, etc., to achieve the effect of cost saving, less processing, and high gloss retention rate

Inactive Publication Date: 2017-05-31
HENGYANG SHANTAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few polyester resin products with outstanding heat resistance in the domestic market, so it is necessary to research and develop a polyester resin for powder coatings with outstanding heat resistance

Method used

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  • Polyester resin for high-temperature-resisting powdered paint and preparation method of polyester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A polyester resin for high-temperature-resistant powder coatings, the polyester resin includes the following raw materials in parts by weight:

[0044] Neopentyl glycol 15 parts

[0045] 1,2-propanediol 2 parts

[0046] 2 parts of 2-methyl-1,3-propanediol

[0047] 35 parts of terephthalic acid

[0048] 10 parts of isophthalic acid

[0049] 2 parts adipic acid

[0050] 35 parts of trimethylolpropane

[0051] Trimethylolethane 40 parts

[0052] Tris (2-hydroxyethyl) isocyanurate 0.5 parts

[0053] Catalyst 1 part

[0054] Antioxidant 0.3 parts

[0055] Accelerator 0.2 part.

[0056] In the present embodiment, catalyzer is monobutyl tin oxide, and promotor is tetrabutyl ammonium chloride, and antioxidant comprises antioxidant 3114 and antioxidant 168, and the mass ratio of antioxidant 3114 and antioxidant 168 is 1:2.

Embodiment 2

[0058] A polyester resin for high-temperature-resistant powder coatings, the polyester resin includes the following raw materials in parts by weight:

[0059] Neopentyl glycol 40 parts

[0060] 10 parts of 1,2-propanediol

[0061] 10 parts of 2-methyl-1,3-propanediol

[0062] 45 parts of terephthalic acid

[0063] 25 parts of isophthalic acid

[0064] 7 parts of adipic acid

[0065] 80 parts of trimethylolpropane

[0066] 70 parts of trimethylolethane

[0067] Tris(2-hydroxyethyl)isocyanurate 2 parts

[0068] Catalyst 3 parts

[0069] Antioxidant 0.8 parts

[0070] Accelerator 0.7 parts.

[0071] In the present embodiment, the catalyst is dibutyltin oxide, the promotor is ethyltriphenylphosphine bromide, the antioxidant includes antioxidant 3114 and antioxidant 168, and the quality of antioxidant 3114 and antioxidant 168 The ratio is 2:1.

Embodiment 3

[0073] A polyester resin for high-temperature-resistant powder coatings, the polyester resin includes the following raw materials in parts by weight:

[0074] Neopentyl glycol 25 parts

[0075] 1,2-propanediol 6 parts

[0076] 6 parts of 2-methyl-1,3-propanediol

[0077] 40 parts of terephthalic acid

[0078] 18 parts of isophthalic acid

[0079] 5 parts of adipic acid

[0080] Trimethylolpropane 55 parts

[0081] Trimethylolethane 55 parts

[0082] Tris (2-hydroxyethyl) isocyanurate 1.3 parts

[0083] Catalyst 2 parts

[0084] Antioxidant 0.5 parts

[0085] Accelerator 0.5 parts.

[0086] In this embodiment, the catalyst is monobutyltin oxide, the promotor is tetrabutylammonium chloride, the antioxidant includes antioxidant 3114 and antioxidant 168, and the mass ratio of antioxidant 3114 to antioxidant 168 is 1:1.

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Abstract

The invention belongs to the technical field of organic macromolecular compounds and in particular relates to polyester resin for high-temperature-resisting powdered paint and a preparation method of the polyester resin. The polyester resin is prepared from the following raw materials in parts by weight: 15 to 40 parts of neopentyl glycol, 2 to 10 parts of 1,2-propylene glycol, 2 to 10 parts of 2-methyl-1,3-propylene glycol, 35 to 45 parts of terephthalic acid, 10 to 25 parts of m-phthalic acid, 2 to 7 parts of hexanedioic acid, 35 to 80 parts of trimethylol propane, 40 to 70 parts of trimethylol ethane, 0.5 to 2 parts of tri(2-ethoxyl)isocyanurate, 1 to 3 parts of a catalyst, 0.3 to 0.8 part of an antioxygen and 0.2 to 0.7 part of an accelerant. The polyester resin provided by the invention has proper glass transition temperature and viscosity and the prepared powdered paint has excellent heat resistance and mechanical properties and good water boiling resistance; under the conditions that the polyester resin is baked at 270 DEG C for 6h or is baked at 300 DEG C for 1h, a coating basically does not lose light; the polyester resin has relatively high luster retention ratio.

Description

technical field [0001] The invention belongs to the technical field of organic polymer compounds, and specifically refers to a polyester resin for high-temperature-resistant powder coatings and a preparation method thereof. Background technique [0002] Powder coating is a solid powder coating without volatile solvents. It has the advantages of no solvent, low pollution, high material utilization rate, and low energy consumption. It is widely used in the technical fields of household appliances, mechanical equipment, anti-corrosion pipelines and building materials. The powder coating uses the resin and the curing agent to undergo a cross-linking reaction after heating to form an infusible hard coating. When the temperature is high, the coating can only decompose and will not soften like a thermoplastic resin coating, so it has a strong mechanical properties. [0003] Compared with other types of powder coatings, polyester resin powder coatings have unique properties. For ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/20C08G63/85C09D167/02C09D5/03C09D7/12
CPCC08G63/20C08G63/85C08K5/34924C09D5/03C09D5/18C09D7/63C09D167/02
Inventor 李烈栋张良务
Owner HENGYANG SHANTAI CHEM
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