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Purified hexanediol terephthalate as toughening agent for powder coating and synthesis method and application of purified hexanediol terephthalate

A technology of hexylene glycol ester and purified terephthalic acid, which is applied in powder coatings, chemical instruments and methods, coatings, etc., can solve problems such as undiscovered patent documents, and achieve visual saturation and elastic effects Visible, easy post-processing, enhanced scratch and rub resistance

Inactive Publication Date: 2014-07-30
TIANJIN XIANGSHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Through the search, no published patent documents related to the patent application of the present invention have been found

Method used

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  • Purified hexanediol terephthalate as toughening agent for powder coating and synthesis method and application of purified hexanediol terephthalate
  • Purified hexanediol terephthalate as toughening agent for powder coating and synthesis method and application of purified hexanediol terephthalate
  • Purified hexanediol terephthalate as toughening agent for powder coating and synthesis method and application of purified hexanediol terephthalate

Examples

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Effect test

Embodiment 1

[0048] A kind of toughening agent pure ethylene glycol terephthalate for powder coating, its composition and parts by weight are as follows:

[0049]

[0050] The purified terephthalic acid is white crystal or powder at normal temperature, low toxicity, purity 99.9%; ash content ≤ 6ppm; p-toluic acid content ≤ 150ppm; density 1.510g / cm 3 ; Sublimation at 402 degrees under normal pressure, melting at about 425 degrees.

[0051] The 1,6-hexanediol, chemical name: HOCH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 OH; Density: 0.96g / cm 3 ; Melting point: 41.6°C; Boiling point: about 250°C; Flash point: 137°C; Acid value: <0.1mgKOH / g; Hydroxyl value: <0.5KOHmg / g; High tensile strength, high elasticity, good flexibility, It can improve the impact resistance of the resin; it also has excellent solvent resistance, swelling resistance, migration resistance, and low temperature resistance. It can be widely used in tough materials, rubber, and modified resins.

[0052] The esterification c...

Embodiment 2

[0065] A kind of toughening agent refined terephthalylene glycol ester for powder coating, its composition and parts by weight are as follows:

[0066]

[0067] The raw materials are: purified terephthalic acid, 1,6-hexanediol, and the purity of the raw materials is ≥99.9%;

[0068] Moreover, the esterification catalysts are tetraisopropyl titanate, tetrabutyl titanate, and dibutyltin di-p-toluenesulfonate. Generally, binary compounding or multi-element compounding is used for better catalytic effect, and the addition amount is the total reaction 0.1%-0.3% of the weight of the object.

[0069] Moreover, the antioxidant is triphenyl phosphite or hindered phenol, which is added in intervals along with other materials to prevent side reactions of high-temperature oxidation, so that the final product has good color transparency and no yellowing.

[0070] A kind of synthetic method of toughening agent pure hexanediol terephthalate for a kind of powder coating as above, syntheti...

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Abstract

The invention relates to purified hexanediol terephthalate as a toughening agent for a powder coating. The molecular structure of the purified hexanediol terephthalate is shown in the specification. The toughening agent disclosed by the invention has a linear structure and low-temperature toughness, good compatibility with an existing resin system, and is beneficial to increasing electrostatic charge and electrostatic spraying. The toughening agent with a hydroxyl group can be well chelated with other metal substrates to increase adhesive force and is used as a film-forming material for the powder coating, the generated coating layer has higher adhesion force with the treated substrate and the strength, toughness, impact resistance and shear strength of the coating layer are significantly improved. The coating layer is free of cracking and peeling and cold resistance and thermal fatigue performance are greatly improved after the workpiece is coated and then formed. The surface of the coating layer is relatively dense, smooth and full and fresh glossy. The hardness, resistance to scratches and abrasion resistance of the coating layer are greatly enhanced and the visual saturation and elastic effect are very significant.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and relates to the synthesis of toughening plasticizers, in particular to a toughening agent for powder coatings, pure hexylene terephthalate, and a synthesis method and application thereof. Background technique [0002] Powder coating coatings have always been difficult in the field of low-temperature toughness and post-forming technology. The winter temperature in northern my country is as low as minus ten degrees, and the coating becomes very brittle and easy to crack under low temperature environment. In addition, in some application fields (such as color steel plates, home appliance back plates, etc.) that are coated and reshaped, the toughness of the coating is extremely high; there is another application that is anti-corrosion coating for refrigerator shelves, refrigerated shelves, and air-conditioning pipelines. It also requires low-temperature toughness, and it is difficult fo...

Claims

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Application Information

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IPC IPC(8): C07C69/82C07C67/08C09D7/12C09D5/03C08K5/12
CPCC07C67/08C07C69/82C08K5/12C09D5/033C09D7/63
Inventor 王焱赵金祥王鹏飞
Owner TIANJIN XIANGSHENG NEW MATERIALS CO LTD
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