Fibre reinforced vinyl ester resin base pultrusion composite

Abstract

A fibre reinforced vinylester-resin composition with high toughness, strength and high-temp resistance is prepared from the refractory vinylester-resin composition prepared from phenolic vinylester resin, biphenol-A vinylester resin, solidifying agent and additive, and the reinforcing fibres chosen from carbon fibres, glass fibres, aramide fibres and their mixture through pulling and extruding.

Description

technical field [0001] The invention relates to a high-temperature-resistant fiber-reinforced resin-based composite material, especially a fiber-reinforced vinyl ester resin composite material for pultrusion molding. Background technique [0002] Pultrusion composite materials are composed of various resins and high-performance fibers, and have been widely used in aerospace, infrastructure and industrial fields, such as continuous sucker rods prepared by pultrusion of carbon fibers and resins, which have high strength, light weight With the characteristics of high quality, fatigue resistance and corrosion resistance, it has become a new material for crude oil extraction in high water-cut oil wells, deep wells, ultra-deep wells and corrosion wells. However, as the depth of the oil well increases by 100m, the temperature of the formation will increase by 3°C. When the depth of the pump is 3500m, the temperature of the mixture of crude oil and water in the oil well will reach 1...

AI Technical Summary

Problems solved by technology

The temperature resistance of the resin matrix determines the temperature resistance of the composite material. At present, vinyl ester resin has become the main resin matrix of pultrusion composite materials because of its excellent mechanical properties, heat resistance, corrosion resistance and rapid curing. , but the heat resistance is difficult to meet the requirements of higher service temperature. For example, the general-purpose bisphenol A vinyl ester resin has a glass transition temperature of 136°C, and its composite materials can only be used for a long time in an environment below 90°C.

Although the heat resistance of resin-based composites can be improved in the following ways: including amine modification, boric acid modification, aromatic hydrocarbon modification, molybdenum modification, polyimide modification, phosphorus modification, benzoxazine Compound modification and cyanate modification, but the pultrusion process has strict requirements on the viscosity, curing speed, wettability and other properties of the resin, and many modification methods cannot meet the requirements of a stable and continuous pultrusion process

For example, Japanese patent JP1266120 discloses a heat-resistant vinyl ester resin composition, which uses novolac epoxy resin-methacrylate, epoxy resin-methacrylate, styrene, and divinylbenzene to react with additives. A heat-resistant vinyl ester resin composition is formed to improve the heat resistance of vinyl ester resin, but the production process of this method is complicated, and it is mainly used in the compression molding process, and it is difficult to directly adopt it in the pultrusion production process

U.S. Patent No. 4,480,077 discloses a heat-resistant vinyl ester resin. Heat resistance is improved by adding ethylenically unsaturated monomers and dicyclopentadiene to the vinyl ester resin, but the toughness of the composite material will be reduced, and the impact strength will be reduced. decline, the prepared pultruded composites cannot meet the high-performance sucker rod use

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