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High temperature resistant epoxy glass fiber reinforced plastic composite material and preparation method thereof

A technology of epoxy glass reinforced plastic and composite material, applied in the field of epoxy glass reinforced plastic composite material and its preparation, can solve the problem of reducing the high temperature resistance of epoxy glass reinforced plastic composite material, achieve good acid resistance, avoid free phenol, change high temperature resistance performance Effect

Inactive Publication Date: 2014-04-02
高金技术产业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, there are low-molecular impurities such as free phenol in the epoxy FRP composite material prepared by the traditional method. The free low-molecular impurity will reduce the high temperature resistance of the epoxy FRP composite material. The long-term service temperature of epoxy polyester FRP composite materials in the field usually does not exceed 120°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Put 100kg of methoxyxylene, 80kg of cresol and oxalic acid with a mass percentage of 10% into the reactor, heat it to 120°C for dehydration reaction, and cool down after dehydration. When the temperature is lowered to 50℃, add 100kg of acetone, 5kg of 15% ammonia by mass, 10kg of calcium carbonate powder with a fineness of 300 mesh and 100kg of formaldehyde at the same time. After the vacuum dehydration reaction becomes transparent, add 3kg of chlorination. The stannous accelerator is prepolymerized with 2kg of ethanol, and when the reactant is transparent brown-red, a methoxyxylene modified phenolic resin is obtained.

[0032] The above-mentioned methoxyxylene-modified phenolic resin and epoxy resin were mixed in a weight ratio of 3:1, and 20 kg of maleic anhydride was added at the same time. Mix uniformly to obtain phenolic epoxy resin, add 40kg of glass fiber cloth for pre-impregnation, then take out the pre-impregnated glass fiber cloth, place it at a temperature of 18...

Embodiment 2

[0039] Put 120kg of methoxyxylene, 90kg of cresol and 3kg of 25% acetic acid into the reactor, heat to 125°C for dehydration reaction, after dehydration, lower the temperature to 55°C for cooling; then add 8kg of sodium hydroxide with 0.2% mass percentage concentration, 110kg of formaldehyde and 120kg of acetone, 10 parts of aluminum oxide powder with a fineness of 400 mesh, undergo vacuum dehydration reaction, and then add 6kg of 2-thiol benzene to transparent The thiazole accelerator is prepolymerized with 8 kg of ethanol until the reactant is transparent brown-red, and a phenolic resin is obtained.

[0040] The above-mentioned phenolic resin and epoxy resin were mixed in a ratio of 3:1, while adding 10kg of maleic anhydride. Mix uniformly to obtain phenolic epoxy resin, and add 60kg of glass fiber cloth for pre-impregnation.

[0041] The pre-soaked glass fiber cloth is taken out, and dried in an environment with a temperature of 180° C. to obtain a glass fiber cloth sheet cover...

Embodiment 3

[0049] Put 110kg of methoxyxylene, 100kg of cresol and 4kg of acetic acid with a mass percentage of 25% into the reactor, heat it to 140℃ for dehydration reaction, after dehydration, lower the temperature to 70℃ for cooling; Add 6kg of 0.2% by mass sodium hydroxide, 120kg of formaldehyde, 115kg of acetone, 7 parts of 400 mesh aluminum oxide powder, vacuum dehydration reaction, and then add 4kg of 2-thiol benzothiazole accelerator after it becomes transparent The pre-polymerization reaction is carried out with 5 kg of methanol until the reactant is transparent brown-red, and a methoxy xylene modified phenolic resin is obtained.

[0050] The above-mentioned methoxyxylene-modified phenolic resin and epoxy resin were mixed in a ratio of 3:1, and 30kg of triphenyl phosphate was added at the same time. Mix uniformly to obtain a phenolic epoxy resin, add 80 kg of glass fiber cloth for pre-impregnation; the thickness of the glass fiber cloth sheet is 3 mm.

[0051] The pre-impregnated gla...

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Abstract

The invention discloses a high temperature resistant epoxy glass fiber reinforced plastic composite material and a preparation method thereof. The method for preparing the high temperature resistant epoxy glass fiber reinforced plastic composite material mainly includes the following steps that firstly methoxyl xylene, cresol and an acid catalyst are placed in a reacting kettle and heated to be subjected to a dehydration reaction, after the dehydration reaction, the cooling is performed, then a basic catalyst, formaldehyde, acetone and an inorganic filler are added to perform a vacuum dehydration reaction, then an accelerating agent and a solvent are further added to perform a prepolymerization reaction to obtain a methoxyl xylene modified phenolic resin, the methoxyl xylene modified phenolic resin and an epoxy resin are mixed according to a scheduled proportion, and simultaneously a curing agent is added to obtain a novolac epoxy resin. Then glass fiber cloths are added to perform a preimpregnation, preimpregnated glass fiber cloths are dried to obtain glass fiber cloth pieces, and finally pressurization is performed under the condition of a high temperature to obtain the epoxy glass fiber reinforced plastic composite material. By means of the method, the prepared epoxy glass fiber reinforced plastic composite material is good in the high temperature resistant performance.

Description

Technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a high temperature resistant epoxy glass fiber reinforced plastic composite material and a preparation method thereof. Background technique [0002] Epoxy FRP composite materials are usually used in fields with higher performance requirements, such as chemical, metallurgy and other fields. Traditional epoxy glass fiber reinforced plastic composite materials are usually made of epoxy resin mixed with a certain proportion of ordinary phenolic resin as body resin, and at the same time, some modifiers are added to the body resin to modify the body resin. Generally, there are low-molecular impurities such as free phenol in epoxy FRP composites prepared by traditional methods. The free low-molecular impurities will reduce the high temperature resistance of epoxy FRP composites. At present, they are used in storage chemical industry and metallurgy. The long-term use t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/08C08L63/00C08K7/00C08K7/14C08K3/26C08K3/22
Inventor 凤翔
Owner 高金技术产业集团有限公司