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Composition used in VPI process

A technology of composition and process, applied in the field of resin, to achieve the effect of low viscosity, good cohesiveness, and reduction of residual small molecules

Active Publication Date: 2020-08-21
浙江博菲电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, the environment-friendly unsaturated polyester resin compounded on the basis of low molecular weight unsaturated polyester has insufficient performance, and cannot meet the impregnated insulating resin used in high-end equipment such as rail transit traction power and large offshore wind power. For the requirements of unsaturated polyester resin, this environmentally friendly unsaturated polyester resin needs to have excellent crosslinking and solubility, and has better heat resistance, weather resistance, corrosion resistance and bonding strength after curing

Method used

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  • Composition used in VPI process
  • Composition used in VPI process
  • Composition used in VPI process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 220g 1,4-cyclohexanedimethanol, 50g hydrogenated bisphenol A, 15g neopentyl glycol, 16g 1,3-butanediol, 100g fumaric anhydride, 115g cyclohexanedicarboxylic acid, 23g hydrogenated terpene maleic anhydride and 10 g SO 4 2- / ZrO 2 Type solid acid catalyst into a three-necked flask, heat up to 160°C for 1 hour, heat up to 170°C for 1 hour, then heat up to 180°C for 1.5 hours, then measure the acid value of the reactant to 155mgKOH / g, then add 1-( 2-Hydroxyethyl)pyrrole 20g, react at 160-180°C for 1 hour, heat up to 195-200°C, after 2 hours of heat preservation, the acid value is 32mgKOH / g, keep heat at 195-200°C, and increase the vacuum degree steadily within 20 minutes to 450Pa, the acid value of the reactant after maintaining vacuum distillation for 30 minutes was 13mgKOH / g.

[0053] Cool the above ester polymer to 130°C, add 1g of inhibitor hydroquinone, mix for 5 minutes, and discharge until 300g of crosslinking agent has been added (100g of ethylene glycol dimethac...

Embodiment 2

[0057] 220g1,4-cyclohexanedimethanol, 50g hydrogenated bisphenol A, 15g neopentyl glycol, 16g1,3-butanediol, 100g fumaric anhydride, 115g cyclohexanedicarboxylic acid, 23g hydrogenated terpene Toric anhydride and 10g SO 4 2- / ZrO 2 Type solid acid catalyst into a three-necked flask, heat up to 160°C for 1 hour, heat up to 170°C for 1 hour, then heat up to 180°C for 1.5 hours, then measure the acid value of the reactant to 155 mgKOH / g, then add 20 grams of 1 -(2-Hydroxyethyl)pyrrole, react at 160-180°C for 1 hour, raise the temperature to 195-200°C, after 2 hours of heat preservation, the acid value is 32mgKOH / g, keep heat at 195-200°C, and increase the vacuum degree steadily within 20 minutes To 450Pa, the acid value of the reactant was 13mgKOH / g after maintaining the vacuum distillation for 30 minutes.

[0058] Cool the above-mentioned ester polymer to 130° C., add 1 g of inhibitor hydroquinone, mix for 5 minutes, and discharge until 300 g of crosslinking agent (100 g of e...

Embodiment 3

[0062] 220g1,4-cyclohexanedimethanol, 50g hydrogenated bisphenol A, 15g neopentyl glycol, 16g1,3-butanediol, 100g fumaric anhydride, 115g cyclohexanedicarboxylic acid, 23g hydrogenated terpene To acid anhydride is put into a three-necked flask, heated up to 160°C for 1 hour, heated up to 170°C for 1 hour, then heated up to 180°C for 1.5 hours, then measured the acid value of the reactant to be 155 mgKOH / g, then added 20 grams of 1-( 2-Hydroxyethyl)pyrrole, react at 160-180°C for 1 hour, heat up to 195-200°C, after 2 hours of heat preservation, the acid value is 32mgKOH / g, keep heat at 195-200°C, and steadily increase the vacuum degree to 450Pa within 20 minutes , the acid value of the reactant was 13mgKOH / g after maintaining the vacuum distillation for 30 minutes.

[0063] Cool the above-mentioned ester polymer to 130° C., add 1 g of inhibitor hydroquinone, mix for 5 minutes, and discharge until 300 g of crosslinking agent (100 g of ethylene glycol dimethacrylate, 70 g of 1,6 ...

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PUM

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Abstract

A composition used in a VPI process comprises an ester polymer, epoxy resin, an initiator, a curing agent, an accelerant, a cross-linking agent and the like, the ester polymer is low-viscosity unsaturated polyester with an alicyclic structure and is formed by polymerizing 45-60 parts of alicyclic polyol, 0-15 parts of aliphatic polyol, 15-25 parts of unsaturated acid and anhydride corresponding tothe unsaturated acid, 20-30 parts of alicyclic polybasic acid and anhydride corresponding to the alicyclic polybasic acid, and 1-5 parts of a pyrrole compound. The composition provided by the invention has excellent compatibility and synergistic curability, and a cured product of the composition has the characteristics of high bonding strength, low high-temperature dielectric loss, heat resistance, weather resistance, corrosion resistance and the like, and is suitable for being applied to main insulation, such as rail transit traction power equipment, large offshore wind power equipment and other high-end equipment.

Description

technical field [0001] The present invention relates to a resin, and more particularly to a composition for a VPI process, containing a low molecular weight ester polymer. Background technique [0002] Unsaturated polyester is one of the more common thermosetting resins. It is mainly an ester polymer containing active unsaturated double bonds produced by polycondensation of dibasic acids and dibasic alcohols. [0003] Unsaturated polyester is generally solid, dissolved in compounds containing active double bonds, such as styrene, vinyl toluene, acrylate, methacrylic acid polyester, allyl ether or ester, etc. to form a liquid unsaturated polyester resin . These low-viscosity "active double bond compounds" play the role of copolymerization crosslinking and reducing the viscosity of unsaturated polyester, and are usually called "crosslinking agents" or "reactive diluents". [0004] The most commonly used unsaturated polyester crosslinking agent is styrene, and vinyl toluene, ...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08F290/06C08F222/14C08F218/16C08F216/12
CPCC08F283/01C08F290/064C08F222/102C08F218/16C08F216/125C08F222/103
Inventor 狄宁宇虞希高陆云峰许坤凌斌陈瑞程微
Owner 浙江博菲电气股份有限公司
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