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Polyester-phenolic aldehyde-epoxy composite material and preparation method thereof

A composite material and polyester technology, applied in the field of layered materials and their preparation, can solve problems such as easy cracking and poor toughness, and achieve the effect of overcoming poor toughness and high low temperature brittleness

Active Publication Date: 2014-07-23
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Epoxy (or phenolic epoxy) resin glass fiber cloth reinforced laminated (roll) products in the prior art have the disadvantages of poor toughness at low temperature and easy cracking, etc.

Method used

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  • Polyester-phenolic aldehyde-epoxy composite material and preparation method thereof
  • Polyester-phenolic aldehyde-epoxy composite material and preparation method thereof
  • Polyester-phenolic aldehyde-epoxy composite material and preparation method thereof

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preparation example Construction

[0043] Preparation of the first part polyester-phenolic-epoxy adhesive

[0044] Basic raw materials:

[0045] Low-molecular-weight polyester resin is self-made polyethylene terephthalate, polytrimethylene terephthalate or polybutylene terephthalate with a weight-average molecular weight of 800 to 1200. method manufacturing. The cardanol-modified phenolic resin is self-made and manufactured by the method provided in the content of the present invention. The epoxy resin is E-44 produced by Yueyang Baling Petrochemical Company, and the nano-silica is the nano-silica produced by Shanghai Huijingya Nano New Material Co., Ltd.

Embodiment 1-1

[0047] Mix 20kg of polyethylene terephthalate with a weight average molecular weight of 800, 60kg of cardanol-modified phenolic resin and 140kg of mixed solvent (acetone: ethyl acetate: toluene: ethanol = 3:1:2:1) Add it into the reactor, stir at 40℃~60℃ for 1~2h, cool down to room temperature, add 45kg of epoxy resin, 0.5kg of nano-silicon dioxide, stir evenly, then add 2kg of hexamethylenetetramine, stir for 0.5 h, and make it fully dispersed and dissolved, then add 0.15kg accelerator (2-methylimidazole: 2-ethyl-4-methylimidazole = 1:2) to adjust the molding time of the mixture, under 160 ℃ hot plate The molding time of the small knife method is 240 seconds, and the preparation is completed.

Embodiment 1-2

[0049] Mix 20kg of polyethylene terephthalate with a weight average molecular weight of 800, 80kg of cardanol-modified phenolic resin and 210kg of mixed solvent (acetone: ethyl acetate: toluene: ethanol = 3:1:2:1) Add it into the reactor, stir at 40℃~60℃ for 1~2h, cool down to room temperature, add 55kg of epoxy resin, 3kg of nano-silicon dioxide, stir evenly, then add 2.5kg of hexamethylenetetramine, stir for 0.5 h, and make it fully dispersed and dissolved, then add 0.05kg accelerator (2-ethyl-4-methylimidazole: 2-undecylimidazole = 4:1) to adjust the molding time of the mixture, and heat it at 160°C The molding time of the small knife method under the plate is 480 seconds, and the preparation is completed.

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Abstract

The invention discloses a polyester-phenolic aldehyde-epoxy composite material and a preparation method thereof. The composite material is prepared by one or more layers of polyester-phenolic aldehyde-epoxy glass fiber cloth prepreg through hot-pressing or hot-pressing, rolling and curing, wherein the polyester-phenolic aldehyde-epoxy glass fiber cloth prepreg is semi-cured alkali-free glass fiber cloth which is soaked with polyester-phenolic aldehyde-epoxy adhesive and pre-baked to remove part of a solvent. After being completely and thermally cured, the composite material contains 36%-44% of resin condensate and 56%-64% of alkali-free glass fiber cloth. The polyester-phenolic aldehyde-epoxy composite material prepared by the preparation method disclosed by the invention is applicable to being used as a composite material for a liquid-state canning container or a structural member working under an environment of (-)160 DEG C-130 DEG C, has the characteristics of being high in strength at a low temperature, good in toughness and the like, and is strong in practicability.

Description

technical field [0001] The invention belongs to a layered material containing an organic polymer compound and its preparation, and relates to a polyester-phenolic-epoxy composite material and a preparation method thereof. The polyester-phenolic-epoxy composite material prepared by the present invention is especially suitable for working in an environment of -160°C to 130°C, and uses polyester, cardanol-modified phenolic-epoxy mixture as a base resin for liquid canning containers and structures. Composite materials for parts. Background technique [0002] In recent years, high-strength lightweight fiber-reinforced epoxy resin composites have been gradually applied in ultra-low temperature environments. Fumio Sawa and others systematically studied the molecular design of epoxy resins used at low temperature. In the formulation design of epoxy resin, technical problems of high brittleness and easy cracking are often encountered. Wang Rong and others summarized the progress o...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08L63/02C08L67/02C08K13/04C08K7/14C08K3/36C08J5/24B29C43/58B29C35/02
Inventor 黄洪驰彭晓伟邵亚婷刘锋
Owner SICHUAN DONGFANG INSULATING MATERIAL
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