One-component halogen-free flame-retardant insulating impregnation resin and preparation method thereof

An insulation impregnation, one-component technology, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problem of mechanical property degradation of resin cured products, migration of non-reactive flame retardants, and unsaturated polyester resin chains. The problems such as the decrease of segmental unsaturated bond density can be solved, and the effects of good mechanical properties, clear and feasible mechanism, and excellent flame retardant performance can be achieved.

Active Publication Date: 2022-03-11
ZHEJIANG RONGTAI TECH ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the Chinese invention patent with the publication number CN101514253A, a preparation method of a halogen-free flame-retardant unsaturated polyester is disclosed, which introduces phosphorus into the resin system through copolymerization and post-addition, but the introduction of additive flame retardants makes The mechanical properties of the resin cured product are reduced, and there is a problem of migration of non-reactive flame retardants
[0004] In the Chinese invention patent with the authorized notification number CN101386669B, a reactive transparent halogen-free flame-retardant unsaturated polyester and its preparation method are disclosed. It uses reactive phosphorus-containing monomers containing carboxyl and hydroxyl groups to synthesize unsaturated poly Ester resin, the prepared resin system has excellent flame retardant performance after curing, and the vertical combustion reaches UL94-V0 level, but this preparation method uses a large amount of phosphorus-containing dihydric alcohol and dibasic acid, resulting in unsaturated polyester resin The unsaturated bond density of the chain segment decreases, which has a greater impact on the mechanical properties of the resin
[0005] Judging from the currently published patents and related literature, it is difficult to take into account the flame retardancy and mechanical properties of the entire resin system simply by synthesizing a phosphorus-containing unsaturated polyester resin, combining a diluent and a curing system to form a resin system

Method used

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  • One-component halogen-free flame-retardant insulating impregnation resin and preparation method thereof
  • One-component halogen-free flame-retardant insulating impregnation resin and preparation method thereof
  • One-component halogen-free flame-retardant insulating impregnation resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1: A single-component halogen-free flame-retardant insulating impregnated resin, each component and its corresponding parts by weight are shown in Table 1, and prepared by the following steps:

[0045] Step 1, preparation of phosphorus-containing unsaturated polyester resin: put corresponding parts by weight of 2-carboxyethylphenyl hypophosphorous acid and ethylene glycol with a percentage content of 40% into the reaction kettle, and react under the condition of 120°C 2h, then add the remaining ethylene glycol and all the fumaric acid, first react at 160°C for 4h, then raise the temperature to 210°C for 4h, when the acid value of the reaction system is lower than 50mgKOH / g, Stop the reaction and cool down to 80°C;

[0046] Step 2, preparation of phosphorus-containing oligomers: Put corresponding parts by weight of 2-carboxyethylphenylphosphinic acid and ethylene glycol into the reactor, react at 120°C for 2 hours, and then reduce the pressure to -0.095MPa Vacuu...

Embodiment 2-7

[0048]Example 2-7: A single-component halogen-free flame-retardant insulating impregnated resin, the difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0049] Each component and parts by weight thereof in table 1 embodiment 1-7

[0050]

[0051]

Embodiment 8

[0052] Example 8: A method for preparing a single-component halogen-free flame-retardant insulating impregnated resin, which is different from Example 1 in that:

[0053] Step 1, preparation of phosphorus-containing unsaturated polyester resin: put corresponding parts by weight of hydroxymethylphenyl hypophosphorous acid and ethylene glycol with a percentage content of 40% into the reaction kettle, and react at 120° C. for 2 hours, Then add the remaining ethylene glycol and all the fumaric acid, first react at 160°C for 4h, then raise the temperature to 210°C for 4h, stop the reaction when the acid value of the reaction system is lower than 50mgKOH / g , cooled to 80°C.

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Abstract

The invention discloses a single-component halogen-free flame-retardant insulating impregnation resin and a preparation method thereof, and relates to the technical field of insulating materials. Its technical points: a single-component halogen-free flame-retardant insulating impregnating resin, including the following components in parts by weight: phosphorus-containing unsaturated polyester resin: 40-60 parts; phosphorus-containing oligomer: 10-25 parts; Crosslinking agent: 5-10 parts; thinner: 20-35 parts; polymerization inhibitor: 0.05-0.1 parts; dicumyl peroxide: 0.5-5 parts; phosphorus-containing unsaturated polyester resin contains the following parts by weight Components: at least one of dibasic alcohol, unsaturated dicarboxylic acid and unsaturated dicarboxylic anhydride: 20-40 parts; reactive phosphorus-containing monomer: 20-30 parts; phosphorus-containing oligomer is molecular weight 500-2000 hydroxyl-terminated type, and includes the following components in parts by weight: dihydric alcohol or saturated dibasic acid or saturated dibasic acid anhydride: 20-40 parts; reactive phosphorus-containing monomer: 40-80 parts. The present application has good mechanical properties while maintaining excellent flame retardant properties.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to a single-component halogen-free flame-retardant insulating impregnated resin and a preparation method thereof. Background technique [0002] Insulating impregnating resin is an insulating impregnating resin based on unsaturated polyester resin with excellent flame retardant performance, which can be applied to the impregnated insulation treatment of motor coils. [0003] In the Chinese invention patent with the publication number CN101514253A, a preparation method of a halogen-free flame-retardant unsaturated polyester is disclosed, which introduces phosphorus into the resin system through copolymerization and post-addition, but the introduction of additive flame retardants makes The mechanical properties of the cured resin are reduced, and there is a problem of migration of non-reactive flame retardants. [0004] In the Chinese invention patent with the authorized ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/06C08L67/02C08G63/692H01B3/42
CPCC08L67/06C08G63/6928H01B3/425C08L2201/02C08L2201/22C08L67/02
Inventor 李利坤黄茶英吴雪君
Owner ZHEJIANG RONGTAI TECH ENTERPRISE
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