Low-temperature quick-curing polyester resin and powder coating for coiled materials prepared from same

A polyester resin, fast curing technology, used in powder coatings, polyester coatings, polyamide coatings, etc., can solve problems such as the inability to achieve low temperature curing

Active Publication Date: 2021-03-26
HUANGSHAN ZHENGJIE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to provide a low-temperature fast-curing polyester

Method used

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  • Low-temperature quick-curing polyester resin and powder coating for coiled materials prepared from same
  • Low-temperature quick-curing polyester resin and powder coating for coiled materials prepared from same
  • Low-temperature quick-curing polyester resin and powder coating for coiled materials prepared from same

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The low-temperature fast-curing type polyester resin described in this embodiment, its preparation raw material comprises the following components by weight:

[0030]

[0031] Monobutyl tin oxide, its consumption is 0.05wt% of preparation raw material total amount;

[0032] Antioxidant 1010, its dosage is 0.5wt% of the total amount of raw materials for preparation.

[0033] The preparation method of the low-temperature fast-curing type polyester resin described in the present embodiment comprises the following steps:

[0034] (1) Add the neopentyl glycol, 1,4-naphthalene dimethanol, and diglycidyl adipate into the reactor, and heat and melt below 135°C;

[0035] (2) Add formulated amount of 3,3-dimethylglutaric acid and terephthalic acid to the above mixed material, and add formulated amount of catalyst at the same time, under the protection of nitrogen, gradually raise the temperature to 195°C at 10°C / h ℃, insulation reaction;

[0036] (3) When the acid value is ...

Embodiment 2

[0041] The low-temperature fast-curing type polyester resin described in this embodiment, its preparation raw material comprises the following components by weight:

[0042]

[0043] Monobutyltin oxide, its consumption is 0.2wt% of preparation raw material total amount;

[0044]Antioxidant 1010, its dosage is 0.3wt% of the total amount of raw materials for preparation.

[0045] The preparation method of the low-temperature fast-curing type polyester resin described in the present embodiment comprises the following steps:

[0046] (1) Add the neopentyl glycol, 1,4-naphthalene dimethanol, and diglycidyl adipate into the reactor, and heat and melt below 135°C;

[0047] (2) Add formulated amount of 3,3-dimethylglutaric acid and terephthalic acid to the above mixed material, and add formulated amount of catalyst at the same time, under the protection of nitrogen, gradually raise the temperature to 190°C at 12°C / h ℃, heat preservation reaction;

[0048] (3) When the acid value...

Embodiment 3

[0053] The low-temperature fast-curing type polyester resin described in this embodiment, its preparation raw material comprises the following components by weight:

[0054]

[0055]

[0056] Monobutyltin oxide, its consumption is 0.1wt% of preparation raw material total amount;

[0057] Antioxidant 1010, its dosage is 0.3wt% of the total amount of raw materials for preparation.

[0058] The preparation method of the low-temperature fast-curing type polyester resin described in the present embodiment comprises the following steps:

[0059] (1) Add the neopentyl glycol, 1,4-naphthalene dimethanol, and diglycidyl adipate into the reactor, and heat and melt below 135°C;

[0060] (2) Add formulated amount of 3,3-dimethylglutaric acid and terephthalic acid to the above mixed material, and simultaneously add formulated amount of catalyst, and gradually raise the temperature to 200°C at 11°C / h under the protection of nitrogen. ℃, insulation reaction;

[0061] (3) When the ac...

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Abstract

The invention belongs to the technical field of powder coatings, particularly relates to a low-temperature quick-curing polyester resin, and further discloses an extinction type powder coating for coiled materials, which is prepared from the low-temperature quick-curing polyester resin. The low-temperature quick-curing polyester resin is prepared by polymerizing the following raw materials: 3, 3-dimethyl glutaric acid, terephthalic acid, an acrylic polymer, diglycidyl adipate, neopentyl glycol, 1, 4-naphthalene dimethanol, 1, 10-decylenediamine and ethylenediamine-N, N '-diacetic acid. The low-temperature quick-curing polyester resin product contains active amino, amide groups with different structures and a small amount of carboxyl, the final acid value is relatively low (less than 12mgKOH/g), the total amine value is relatively high (35-45mgKOH/g), low-temperature quick curing can be conveniently realized completely, and a self-extinction effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, in particular relates to a low-temperature fast-curing polyester resin, and further discloses a powder coating for coils prepared by the polyester resin. Background technique [0002] The coating of coil steel is a pre-coating method, which is different from the traditional "post-coating". Due to its simplified production process, efficient construction, saving investment and operating costs, compliance with environmental regulations, and better performance than traditional A series of advantages such as methods, whether in the field of paint or other types of coatings, are a development direction of the coatings industry in the future. As we all know, traditional liquid coil coatings were successfully developed and applied in the late 1950s and early 1960s. To date, almost all prepainted coil coatings have been painted using liquid coil coatings. However, because liquid coil coatings c...

Claims

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Application Information

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IPC IPC(8): C08G63/42C08G69/44C09D167/00C09D177/12C09D5/03C09D7/61C09D7/63
CPCC08G63/42C08G69/44C09D167/00C09D177/12C09D5/033C08K2003/2241C08K2003/3045C08K13/02C08K3/22C08K3/30C08K5/34924
Inventor 江建明胡泽湘江兴科吴湧泉
Owner HUANGSHAN ZHENGJIE NEW MATERIALS
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