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Environmentally-friendly modified heat-resistant polyester enameled wire paint and preparation method thereof

A polyester wire varnish and modification technology, which is applied in polyester coatings, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of difficult control of the coated wire surface, limited environmental protection effect, and unguaranteed enameled wire performance, etc. problems, to achieve the effect of improved flexibility, outstanding performance, and good molecular flexibility

Active Publication Date: 2013-04-24
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the trial production situation, after the solid content is greatly increased to more than 60%, the viscosity reaches more than 6000mpas, the surface of the coated wire is difficult to control, and the performance of the enameled wire cannot be guaranteed. At the same time, the solvent still contains a large amount of phenolic and aromatic solvents containing benzene rings. Environmental protection effect is limited

Method used

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  • Environmentally-friendly modified heat-resistant polyester enameled wire paint and preparation method thereof
  • Environmentally-friendly modified heat-resistant polyester enameled wire paint and preparation method thereof
  • Environmentally-friendly modified heat-resistant polyester enameled wire paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0066] Add 840 kg of ethylene glycol dimethyl ether into the reaction kettle and start stirring, then add 384.26 kg of trimellitic anhydride and raise the temperature to 80°C. After the material in the reaction kettle is transparent, slowly add 36 kg of water and control the temperature at 80°C to After reacting at 100°C for 2-4 hours, cool down to 60°C-65°C and add 1501.56 kg of MDI to react for 2 hours, raise the temperature to 100°C-120°C, react for 1-2 hours, then add 1,6-hexanediol 118.17 kg, heated up to 130°C to 140°C, and reacted for 2 to 5 hours; then added 432.52 kg of benzyl alcohol, and reacted at 130°C to 140°C for 3 to 5 hours. When the isocyanate content was less than 0.1%, the reaction was terminated and the When the temperature is lowered to 60°C-65°C, a TMA-D intermediate resin A with a solid content of 69.8% and a viscosity of 880mpas (30°C) is obtained.

Embodiment 1-2

[0068] Add 840 kg of ethylene glycol dimethyl ether into the reaction kettle and start stirring, then add 384.26 kg of trimellitic anhydride and raise the temperature to 80°C. After the material in the reaction kettle is transparent, slowly add 36 kg of water and control the temperature at 80°C to After reacting at 100°C for 2-4 hours, cool down to 60°C-65°C and add 1651.72 kg of MDI to react for 2 hours, raise the temperature to 100°C-120°C, react for 1-2 hours, then add 2,2-dimethyl- 104.15 kg of 1,3-propanediol, heated to 130°C-140°C, reacted for 2-5 hours; then added 436.58 kg of hydroxyl compound (phenol:xylenol = 1:1 molar ratio), reacted at 130°C-140°C After 3 to 5 hours, when the isocyanate content is less than 0.1%, the reaction is terminated, and the temperature is lowered to 60°C to 65°C to obtain TMA-D intermediate resin A with a solid content of 70.9% and a viscosity of 960mpas (30°C).

Embodiment 1-3

[0070] Add 840 kg of ethylene glycol dimethyl ether into the reaction kettle and start stirring, then add 384.26 kg of trimellitic anhydride and raise the temperature to 80°C. After the material in the reaction kettle is transparent, slowly add 36 kg of water and control the temperature at 80°C to After reacting at 100°C for 2-4 hours, cool down to 60°C-65°C and add 1080 kg of TDI to react for 2 hours, raise the temperature to 100°C-120°C, react for 1-2 hours, then add 62.03 kg of ethylene glycol, and heat up to 130°C ~140°C, react for 2~5 hours; then add 648.78 kg of cresol, react at 130°C~140°C for 3~5 hours, when the isocyanate content is less than 0.1%, stop the reaction and lower the temperature to 60°C~ 65°C, the TMA-D intermediate resin A with a solid content of 66.7% and a viscosity of 730mpas (30°C) was obtained.

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Abstract

The invention discloses environmentally-friendly modified heat-resistant polyester enameled wire paint and a preparation method thereof. The environmentally-friendly modified heat-resistant polyester enameled wire paint is prepared by mixing TMA-D intermediate resin synthesized by trimellitic anhydride, water, a diisocyanate compound, dihydric alcohol and a hydroxyl compound with low-density heat-resistant polyester resin B, a curing agent, a leveling agent and the like; the mass ratio of TMA-D intermediate resin A to low-density heat-resistant polyester resin B to ether modified tTitanate compound C to leveling agent to a alcohols solvent is (100-150):(800-1000):20:(1-1.5):(50-80); and the solid content of the liquid paint reaches up tp 65-70 percent; and the viscosity is controlled within the scope of 1500-3000 mpas. The environmentally-friendly modified heat-resistant polyester enameled wire paint and the preparation method thereof have the benefits that no material which contains aromatic hydrocarbon and is difficult to degrade is used as a main solvent, the damage to a human body and the pollution to the environment during the production can be effectively reduced, and an environmentally-friendly product with good performance, low toxicity, high solid and less solvent is provided.

Description

technical field [0001] The invention belongs to insulating varnish for electromagnetic wire and its preparation. The invention relates to an environment-friendly modified heat-resistant polyester wire enamel with a solid content of 65-70% by mass and a preparation method thereof. Background technique [0002] In the prior art, the mass percentage content of solids in wire enamel products is generally only about 30-40%, and the solvent content is 70-60%. Solvents use a large amount of phenolic solvents, such as cresol, phenol, and aromatic thinners such as toluene , xylene, and carbon 9 carbon 10 aromatic hydrocarbon solvents, etc., not only caused harm to the staff's body during the production process of enameled wire paint and enameled wire, but also caused considerable pollution to the environment, especially in the enameled wire production process. The solvents in the solvent volatilize or burn, and the incomplete combustion products are discharged into the atmosphere, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/02C09D7/12C09D5/25C08G63/20C07C269/02C07C271/28C07F7/28
Inventor 倪平杜佳袁勇郭刚张先来李建学宗跃强唐安斌
Owner SICHUAN DONGFANG INSULATING MATERIAL
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