High-flexibility polyester epoxy impregnated resin and preparation method thereof

A technology of impregnating resin and polyester resin, which is applied in the field of highly flexible polyester epoxy impregnating resin and its preparation, can solve the problems of paint film cracking, poor toughness, and high brittleness of cured resin, and achieve good flexibility and excellent Effects of mechanical flexibility and high bond strength

Inactive Publication Date: 2017-12-12
ZHUZHOU TIMES ELECTRIC INSULATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For example, patents CN201610977800.8 and CN201610266677.9 respectively report two kinds of polyester epoxy system impregnating resins, the resin system is mainly based on heat-resistant unsaturated polyester, bisphenol A or bisphenol F epoxy resin to develop the formula design, the obtained The resin system has excellent comprehensive performance. However, because the basic unsaturated polyester or epoxy resin used in this type of system resin generally contains more rigid structural units, it is not a flexible resin, and the cured resin still has high brittleness and poor toughness. Especially after the resin is baked and cured, it is easy to produce problems such as cracking of the paint film under the sharp high and low temperature impact, and there are still some deficiencies. Therefore, it is very important for this technical field to study polyester epoxy impregnated resins with high flexibility. significance

Method used

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  • High-flexibility polyester epoxy impregnated resin and preparation method thereof
  • High-flexibility polyester epoxy impregnated resin and preparation method thereof
  • High-flexibility polyester epoxy impregnated resin and preparation method thereof

Examples

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Embodiment 1

[0045] A kind of highly flexible polyester epoxy impregnated resin of the present invention, comprises by mass parts: 32 parts of flexible unsaturated polyester resin UP-1, 30 parts of dimeric fatty acid glycidyl esters (NPER-172), 38 parts of environmental protection Type reactive diluent 1,6-hexanediol dimethacrylate, 0.4 parts of polymerization inhibitor (including 0.2 parts of 2,6-di-tert-butyl p-cresol and 0.2 parts of p-tert-butyl catechol), 0.8 parts Free radical initiator dicumyl peroxide, 0.3 parts of latent epoxy curing accelerator (comprising 0.2 part of chromium acetylacetonate and 0.1 part of zinc naphthenate), its specific preparation method comprises the steps:

[0046] (1) Preparation of flexible unsaturated polyester resin: In a dry 1000mL four-necked round-bottomed flask with mechanical stirring, reflux condenser and air guide tube, add 286.0 g of neopentyl glycol and 58.5 g of trihydroxyethane g, 234.0g of dimerized octadecane unsaturated fatty acid, 260.0g ...

Embodiment 2

[0053] A kind of highly flexible polyester epoxy impregnated resin of the present invention comprises by mass parts: 35 parts of flexible unsaturated polyester resin UP-1, 28 parts of dimeric fatty acid glycidyl esters (HyPox DA323), 36 parts of environment-friendly Reactive diluent triethylene glycol dimethacrylate, 0.4 part of polymerization inhibitor (including 0.2 part of p-methoxyphenol and 0.2 part of 2,6-di-tert-butyl p-cresol), 0.8 part of free radical initiator Dicumyl oxide, 0.4 part of latent epoxy curing accelerator (comprising 0.2 part of aluminum acetylacetonate and 0.2 part of cobalt naphthenate), its preparation method may further comprise the steps:

[0054] (1) Preparation of flexible unsaturated polyester resin: In a dry 1000mL four-necked round-bottomed flask with mechanical stirring, reflux condenser and air guide tube, add 286.0 g of neopentyl glycol and 58.5 g of trihydroxyethane g, 234.0g of dimerized octadecane unsaturated fatty acid, 260.0g of maleic ...

Embodiment 3

[0061] A kind of highly flexible polyester epoxy impregnated resin of the present invention comprises: 30 parts of flexible unsaturated polyester resin UP-2, 30 parts of dimeric fatty acid glycidyl esters (NPER-172), 40 parts of environmental protection Type reactive diluent tripropylene glycol dimethacrylate, 0.4 part of polymerization inhibitor (including 0.2 part of p-benzoquinone and 0.2 part of 2,6-di-tert-butyl p-cresol), 0.8 part of free radical initiator diisoperoxide Propylbenzene, 0.4 part of latent epoxy curing accelerator (comprising 0.2 part of aluminum acetylacetonate and 0.2 part of zinc naphthenate), its preparation method may further comprise the steps:

[0062] (1) Preparation of flexible unsaturated polyester resin: In a dry 1000mL four-necked round-bottomed flask with mechanical stirring, reflux condenser and airway tube, add 181.2g of neopentyl glycol and 1,2-propanediol for the first step 114.7g, 120.8g of 1,4-butanediol, 302.0g of dioctadecane unsaturate...

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Abstract

The invention discloses a high-flexibility polyester epoxy impregnated resin and a preparation method thereof. According to the high-flexibility polyester epoxy impregnated resin, non-flexible unsaturated resin and non-flexible epoxy resin commonly used in the polyester epoxy system impregnated resin of the prior art are replaced by flexible unsaturated polyester resin and flexible type pliable epoxy resin, and by adopting monobasic acid terminated and synthesized flexible unsaturated polyester resin and combining the flexible type pliable epoxy resin with excellent flexibility, the remarkable toughness effect can be achieved, the impregnated resin has excellent mechanical flexibility and good high-low-temperature impact and anti-cracking performance, so that the viscosity of the high-flexibility polyester epoxy impregnated resin can achieve 386mPa.s at 25 DEG C, has good permeation property and can be impregnated by sinking, dripping or VPI, and the resin has excellent electrical insulating performance, wet-heat-resistant performance and chemical-resistant performance.

Description

technical field [0001] The invention belongs to the field of preparation of insulating impregnating resins, and in particular relates to a high-flexibility polyester epoxy impregnating resin and a preparation method thereof. Background technique [0002] Impregnating resin is a kind of thermosetting resin used for insulation impregnation treatment of electrical coil windings such as motors and transformers. It plays the role of electrical insulation, bonding molding and moisture resistance. Thermal properties, mechanical flexibility, chemical resistance and electrical insulation properties, etc., related researchers have done a lot of work on the selection of impregnating resin systems and performance optimization. Among them, polyester epoxy system impregnating resins have excellent properties. The electrical insulation performance, water resistance performance and mechanical bonding performance of the film have attracted more and more researchers' attention. [0003] For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L63/00C08G63/52C08F283/01C08F283/10C08F222/14C08F222/20
CPCC08F283/01C08F283/10C08G63/52C08L63/00C08L67/06C08L2203/20C08F222/102
Inventor 田宗芳李忠良侯海波黎超华裴海帆郭亮王楷李鸿岩
Owner ZHUZHOU TIMES ELECTRIC INSULATION
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