Preparation method of polyester enamelled wire paint with good heat resistance capable of being directly welded
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A technology of polyester wire enamel and heat resistance, which is applied in polyamide coatings, coatings, fireproof coatings, etc., can solve the problems of reducing production efficiency, achieve the effects of improving production efficiency, good heat resistance, and simplifying processing technology
Inactive Publication Date: 2015-03-25
DANYANG STAR CHEM
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Problems solved by technology
[0003] The enameled wire coated with ordinary polyester enameled wire enamel needs to be removed before welding, which greatly reduces the production efficiency
Method used
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Embodiment 1
[0013] The preparation method of the good direct welding polyester wire enamel of the heat resistance of the present embodiment, its steps are as follows:
[0014] Preparation of weldable polyester resin: Take 1 part of isophthalic acid, 1 part of ethylene glycol, and 0.33 parts of 4,4'-diaminodiphenyl ether, and put isophthalic acid, ethylene glycol, For 4,4'-diaminodiphenyl ether, the temperature is gradually raised from room temperature to 200°C under stirring, and the reaction is kept at 200°C until it is transparent, and the vacuum is pumped to the theoretical liquid output.
[0015] Take 40 parts of the above polyester resin and 30 parts of cresol, stir at 180°C for 1 hour, cool to room temperature, add 30 parts of xylene and stir for 1 hour to obtain a direct-solderable polyester wire enamel.
Embodiment 2
[0017] The preparation method of the good direct welding polyester wire enamel of the heat resistance of the present embodiment, its steps are as follows:
[0018] Preparation of weldable polyester resin: Take 1 part of isophthalic acid, 1 part of ethylene glycol, and 0.67 parts of 4,4'-diaminodiphenyl ether, and put in isophthalic acid, ethylene glycol, For 4,4'-diaminodiphenyl ether, the temperature is gradually raised from room temperature to 200°C under stirring, and the reaction is kept at 200°C until it is transparent, and the vacuum is pumped to the theoretical liquid output.
[0019] Take 40 parts of the above polyester resin and 30 parts of cresol, stir at 180°C for 1 hour, cool to room temperature, add 30 parts of xylene and stir for 1 hour to obtain a direct-solderable polyester wire enamel.
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Abstract
The invention relates to a preparation method of a polyester enamelled wire paint with good heat resistance capable of being directly welded, which comprises the following steps: 1)preparation method of weldability resin: employing m-phthalic acid, glycol and 4,4'-diaminodiphenyl ether for resin synthesis, placing m-phthalic acid, glycol and 4,4'-diaminodiphenyl ether in a reaction apparatus in order, gradually heating to 200 DEG C while stirring from room temperature, insulating and reacting until color is transparent, pumping under vacuum to a theoretical liquid volume; and 2)taking polyester resin and methylphenol, stirring for one hour at 180 DEG C, cooling to room temperature, adding xylene and stirring for one hour to obtain the polyester enamelled wire paint with good heat resistance capable of being directly welded. The enamelled wire coated by the polyester enamelled wire paint is capable of being directly welded at 450 DEG C, no welding slag is generated after direct welding, thermal shock temperature is more than 175 DEG C, and cut-through temperature is more than 270 DEG C.
Description
technical field [0001] The invention relates to the field of preparation of wire enamel, in particular to a preparation method of polyester wire enamel with good heat resistance and direct welding. Background technique [0002] Enameled wire enamel is an indispensable electrical insulation coating applied to electrical equipment, and is one of the key raw materials for controlling the economic and technical indicators and operating life of electrical equipment. The insulating layer (that is, the enameled wire paint film) coated on the enameled wire should have good thermal, electrical, mechanical and chemical resistance properties. [0003] Enameled wires coated with ordinary polyester enamelled wire enamel need to be removed before welding, which greatly reduces production efficiency. In order to simplify the production process and improve efficiency, it is necessary to make the polyester wire enamel directly weldable. Contents of the invention [0004] The technical pr...
Claims
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Application Information
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