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Halogen-free flame-retardant insulating paint and preparation method thereof

A technology of insulating varnish and flame retardant, which is applied in coatings, fireproof coatings, polyester coatings, etc., and can solve the problems of high volatile content, high production cost, and high viscosity

Active Publication Date: 2021-05-07
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application CN201810890493.9, Chinese patent application CN201610963290.9, etc. disclose halogen-free flame-retardant insulating varnishes, but all of them use reactive diluents such as vinyl toluene, which have pungent odor, high toxicity, and volatile High, does not meet environmental protection requirements
However, this insulating varnish also has shortcomings, such as high viscosity and poor construction processability. In addition, the entire curing time is long (4.6-6.4h), and the production cost is relatively high due to the use of pure epoxy system

Method used

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  • Halogen-free flame-retardant insulating paint and preparation method thereof
  • Halogen-free flame-retardant insulating paint and preparation method thereof
  • Halogen-free flame-retardant insulating paint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This example provides a kind of phosphorus-containing unsaturated polyester resin, and its preparation process is as follows:

[0040]Add 1.5 mol of resorcinol to 200 ml of xylene, heat up to 125°C to melt the resorcinol, start stirring, add 0.6 mol of phenylphosphoryl dichloride dropwise under stirring condition, and react at 125°C for 9 hours. Add 1.5mol maleic anhydride and 1mol neopentyl glycol at the end of the reaction, raise the temperature to 160°C, then gradually raise the temperature to 190°C at 10°C / h, keep warm until the acid value is less than or equal to 30mg KOH / g, distill under reduced pressure to obtain Phosphorus unsaturated polyester resin, light yellow solid with a number average molecular weight of 850.

Embodiment 2

[0042] This example provides a kind of phosphorus-containing unsaturated polyester resin, and its preparation process is as follows:

[0043] Add 1.8 mol of resorcinol to 200 ml of xylene, heat up to 125°C to melt the resorcinol, start stirring, add 0.8 mol of phenylphosphoryl dichloride dropwise under stirring condition, and react at 125°C for 12 hours. Add 2mol maleic anhydride and 1.5mol neopentyl glycol at the end of the reaction, raise the temperature to 160°C, then gradually raise the temperature to 190°C at 10°C / h, keep warm until the acid value is ≤30mg KOH / g, and distill under reduced pressure to obtain Phosphorus unsaturated polyester resin, measured as a yellow solid with a number average molecular weight of 1000.

Embodiment 3

[0045] This example provides a kind of phosphorus-containing unsaturated polyester resin, and its preparation process is as follows:

[0046] Add 1.7mol resorcinol to 200ml xylene, heat up to 125°C to melt the resorcinol, start stirring, add 0.8mol phenylphosphoryl dichloride dropwise under stirring condition, and react at 125°C for 11 hours. Add 1.6mol maleic anhydride and 1.3mol neopentyl glycol at the end of the reaction, raise the temperature to 160°C, then gradually raise the temperature to 190°C at 10°C / h, keep warm until the acid value is less than or equal to 30mg KOH / g, and distill under reduced pressure to obtain Phosphorus-containing unsaturated polyester resin, light yellow solid with a number average molecular weight of 800.

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PUM

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Abstract

The invention discloses halogen-free flame-retardant insulating paint and a preparation method thereof. The insulating paint is prepared from the following raw materials: phosphorus-containing unsaturated polyester resin, silicon-containing epoxy resin, bifunctional methacrylate, a curing agent, an accelerant, an initiator and a selectable flame retardant, the insulating paint is prepared by the following method: adding the prepared phosphorus-containing unsaturated polyester resin and silicon-containing epoxy resin into a reaction kettle, heating, vacuumizing and reacting, gradually cooling, sequentially adding the bifunctional methacrylate, the accelerant, the flame retardant, the curing agent and the initiator, filtering and packaging to obtain the insulating paint. The special phosphorus-containing unsaturated polyester resin and the silicon-containing epoxy resin are adopted and combined with the bifunctional methacrylate, an insulating layer formed after the insulating paint is cured has good flame retardance, proper viscosity is controlled, rapid curing at a low temperature can be achieved, and the use manufacturability is good.

Description

technical field [0001] The invention belongs to the field of insulating varnish, and in particular relates to a halogen-free flame-retardant insulating varnish and a preparation method thereof. Background technique [0002] Insulating varnish is an important insulating material that is based on high molecular polymer and solidifies into an insulating film or an insulating whole under certain conditions. It is generally composed of resins, curing agents and other materials. With the strengthening of international environmental protection awareness and the establishment of relevant legislation, countries around the world have adopted various restrictions on the discharge of volatile organic solvents in insulating varnishes, and solvent-free insulating varnishes have been widely developed. However, benzene active solvents such as styrene and vinyl toluene are still used in large quantities in traditional solvent-free insulating varnishes. These solvents have a pungent odor, and...

Claims

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Application Information

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IPC IPC(8): C09D5/18C09D5/25C09D183/10C09D167/06C08G63/692C08G63/78
CPCC09D5/18C09D183/10C09D167/06C08G63/6928C08G63/78C08L2201/02C08L2201/22C08L67/06C08K5/523C08K5/526C08L83/10C08K5/527
Inventor 顾健峰吴斌井丰喜张春琪周林江徐庆华潘德忠
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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