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High-tenacity vacuum slow epoxy resin for wind power blade and preparation method thereof

A technology of epoxy resin and wind turbine blades, which is applied in the field of vacuum slow epoxy resin and its preparation, can solve the problems of poor bonding performance and low strength of cured products, and achieve improved impact performance, simple preparation method, and good fluidity Effect

Active Publication Date: 2014-04-02
NEW UNITED GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the problems of poor bonding performance and low strength of cured products in epoxy resins in the prior art, to provide a kind of epoxy resin with better fluidity and less volatile matter, solidified High-toughness vacuum slow-speed epoxy resin for wind power blades with smaller shrinkage rate, higher strength and better mechanical properties and preparation method thereof

Method used

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  • High-tenacity vacuum slow epoxy resin for wind power blade and preparation method thereof

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Experimental program
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Embodiment 1

[0022] A method for preparing a high-toughness vacuum slow-speed epoxy resin for wind power blades, comprising the following steps:

[0023] (1) Preparation of component A

[0024] 72 parts by weight of bisphenol A epoxy resin, 2 parts by weight of monovinyl-terminated epoxy polyether (epoxy value 0.1), 10 parts by weight of bisvinyl-terminated epoxy polyether (epoxy value 0.125), D Put 14 parts by weight of glycidyl ether, 0.5 parts by weight of silane coupling agent, and 1.5 parts by weight of BYK-555 into the reaction kettle, heat to 50-80°C, stir at a stirring speed of 400-550r / min for 1.5-2h, and vacuumize Stop stirring after 30-60 minutes, continue vacuuming for 5-30 minutes, cool down, and put the resin into packaging barrel 1;

[0025] (2) Preparation of component B

[0026] Put 23 parts by weight of polyetheramine and 10 parts by weight of triethylenetetramine into the reactor, heat to 40-65°C, stir at a stirring speed of 450-550r / min for 1.5-2h, vacuumize for 30-60...

Embodiment 2

[0029] The preparation method of components A and B of the vacuum slow epoxy resin of this embodiment is the same as that of Example 1, wherein the formula of component A is as follows: 69 parts by weight of bisphenol F epoxy resin, monovinyl terminated epoxy resin 3 parts by weight of polyether (epoxy value 0.125), 10 parts by weight of divinyl-terminated epoxy polyether (0.125 epoxy value), 8.5 parts by weight of neopentyl glycol glycidyl ether, 7 parts by weight of butyl glycidyl ether , 1.0 parts by weight of silane coupling agent, 1.5 parts by weight of BYK-515; the formula of component B is 18 parts by weight of polyetheramine, and 10 parts by weight of m-phenylenediamine.

[0030] Mix A and B components at a ratio of 100:28 (parts by weight), stir at room temperature for 40 minutes, and mix well. The uniformly mixed resin can be cured at room temperature according to the mold used, and then cured at 70°C for 10-12 hours to obtain the cured finished product.

Embodiment 3

[0032]The preparation method of component A and component B of the vacuum slow epoxy resin of the present embodiment is the same as that of Example 1, wherein the formula of component A is as follows: 60.5 parts by weight of bisphenol A epoxy resin, bisphenol F epoxy resin 10 parts by weight of resin, 9 parts by weight of monovinyl-terminated epoxy polyether (epoxy value 0.15), 9 parts by weight of divinyl-terminated epoxy polyether (epoxy value 0.125), 3 parts by weight of aryl glycidyl ether Parts, 5 parts by weight of butyl glycidyl ether, 2 parts by weight of neopentyl glycol glycidyl ether, 0.5 parts by weight of silane coupling agent, 1.0 parts by weight of BYK-515; the formula of component B is 15 parts by weight of polyetheramine, three 10 parts by weight of ethylene tetramine, 5 parts by weight of tetraethylene pentamine.

[0033] Mix A and B at a ratio of 100:30 (parts by weight), stir at room temperature for 40 minutes, and mix well. The uniformly mixed resin can b...

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Abstract

The invention relates to high-tenacity vacuum slow epoxy resin for a wind power blade and a preparation method thereof. The epoxy resin comprises a component A and a component B, wherein the component A comprises epoxy resin, vinyl-terminated epoxy polyether, an activated thinner, a coupling agent and a defoamer; the component B comprises one or a mixture of two of fatty amine, alicyclic amine and aromatic amine. The vinyl-terminated epoxy polyether and the epoxy resin composition in the technical scheme disclosed by the invention have good compatibility, the epoxy resin composition can be toughened after the vinyl-terminated epoxy polyether is compounded with the activated thinner, and the epoxy resin composition is matched with an amine hardener for use, so that normal-temperature cuing of the resin can be achieved, and the gelation time is 365-397 minutes. The obtained epoxy resin product has good mechanical property, and is applicable to a wind power blade product with high demands on the curing degree and the impact property. The vacuum slow epoxy resin is simple in preparation method and applicable to large-scale popularization and application.

Description

technical field [0001] The invention relates to a vacuum slow-speed epoxy resin and a preparation method thereof, in particular to a high-toughness vacuum slow-speed epoxy resin for wind power blades and a preparation method thereof. Background technique [0002] Most of the wind power blades in the prior art are made of epoxy resin and fiberglass fabric, which has the advantages of light weight, good mechanical performance and low cost. The existing domestically produced ordinary epoxy resin compositions generally have high viscosity, short operating time, weak mechanical properties and weak impact toughness of the cured product, and cannot meet the various performance requirements for manufacturing wind turbine blades. Especially the problem of gel time, the gel time of general-purpose epoxy resin is about 5 hours, but the operation time in the actual construction process of wind power blades needs about 5.5 hours. [0003] At a certain casting temperature, the epoxy resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L63/02C08L71/00C08G59/50C08G59/20
Inventor 徐建东金诚王二平黄礼平黄锦锦陆文明
Owner NEW UNITED GROUP
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