Polyester resin for engineering machinery

A technology of polyester resin and construction machinery, applied in the field of polyester resin, can solve the problem that the resin does not have thick coating and is not suitable, and achieve the effect of unchanged performance, excellent mechanical properties and flexibility.

Inactive Publication Date: 2019-11-29
ANHUI SHENJIAN NEW MATERIALS
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Problems solved by technology

Chinese patent CN103755934B discloses a preparation method of polyester resin for frost-free powder coatings, but this patent only provides a preparation method of frost-free type, which is not suitable for the field of engineering machinery
CN105254860B provides a kind of ...

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  • Polyester resin for engineering machinery
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Embodiment Construction

[0016] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0017] A~D in Table 1 are the primary properties of the embodiments of the present invention and their corresponding polyester resins.

[0018] Preparation method: In a 5-liter glass reactor, put the polyols, branching agents, aromatic acids and appropriate amount of catalysts in the formulas of each example in Table 1 into the reactor at the same time, and slowly heat up to 235-255 C in a nitrogen atmosphere. After the system is clarified, take a sample to detect the acid value (AV) reaches 5-15 (unit: mgKOH / g resin, the same below), add secondary acidolysis agents such as IPA, ADA, CHDA and FCC, and maintain the temperature at 235-250 Acid decapping was carried out at ℃. After the acid...

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Abstract

The object of the present invention is to provide polyester resin for engineering machinery, the polyester resin comprises polyhydric alcohol, aromatic polybasic acid, a branching agent, an acidolysisagent, an esterification catalyst, an antioxidant and a curing accelerator, the acidolysis agent comprises one or a mixture of at least two of isophthalic acid (IPA), adipic acid (ADA), 1,4-cyclohexanedicarboxylic acid (CHDA), fumaric acid (FCC), trimellitic anhydride (TMA), succinic acid (BA) and dodecanedioic acid (DDDA), more preferably comprises at least the IPA and the ADA; the polyester resin can be combined with curing agents (TGIC, hydroxyalkylamide or blocked isocyanate), curing accelerators, pigments, fillers, leveling agent, degassing agents and the like to prepare powder coatingsfor engineering machinery. Compared with conventional polyester resin, the polyester resin has excellent mechanical properties and flexibility, water boiling resistance, weather resistance, low temperature frost resistance, thick coating resistance and unchanged performance when the curing temperature is changed, and crack resistance under freezing impact and bending of iron plates and electrophoresis plates at-18 DEG C, and the polyester resin is very suitable for coating in the field of engineering machinery.

Description

technical field [0001] The invention relates to the field of polyester resins, in particular to a polyester resin for engineering machinery. Background technique [0002] With the growth of China's economy, its demand for construction machinery is higher. Statistics show that the construction machinery industry achieved operating income of 596.4 billion yuan in 2018, an increase of 10.4% over 2017. At present, most products of construction machinery at home and abroad are still sprayed with solvent-based coatings. The spraying process of solvent-based paint is cumbersome and will produce a large amount of volatile organic compounds (VOC), causing serious pollution to the environment. Powder coating does not contain organic volatile matter, can be recycled and reused, and will not pollute the environment. It is an eco-friendly coating encouraged by the government. With the rapid development of the construction machinery industry, powder coatings applied to construction mach...

Claims

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Application Information

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IPC IPC(8): C08G63/52C08G63/20C08G63/78C09D167/06C09D5/03
CPCC08G63/20C08G63/52C08G63/78C08K2003/2241C08K2003/3045C09D5/03C09D5/033C09D167/06C08K13/02C08K3/30C08K3/22
Inventor 周韦明翟春海焦金牛冯跃华汪俊
Owner ANHUI SHENJIAN NEW MATERIALS
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