An anti-sag and anti-crystallization wind power grade hand lay-up resin system and its preparation method

Abstract

The invention discloses an anti-sagging and anti-crystallization wind power grade hand lay-up resin system and a preparation method thereof. The hand lay-up resin system is prepared by mixing compounded epoxy resin component A and denatured curing agent component B. The compounded epoxy resin component A is prepared from bisphenol A epoxy resin, heat-resistant novolac epoxy resin, flexible epoxy resin, reactive diluent, and non-reactive diluent; the denatured curing Agent component B is prepared from synthetic alicyclic amines, amidoamines, fatty amines, cashew nut shell oil modified phenalkamines, accelerators, rheological additives, and dyes. The anti-sagging and anti-crystallization properties of the present invention are significantly enhanced, excellent in wettability to fibers, relatively less affected by the working environment, and the cured product has excellent comprehensive properties such as mechanical properties, toughness, heat resistance and water resistance, which can meet Practical requirements for hand lay-up and repair of various composite materials, especially suitable for large-area high-strength composite materials such as wind power blades.

Description

technical field [0001] The invention relates to the technical fields of chemical engineering and composite materials, in particular to a hand-lay-up resin system for composite material molding and repairing and a preparation method thereof, in particular to an anti-sag and anti-crystallization wind power-grade hand-lay-up resin system and a preparation method thereof . Background technique [0002] The hand lay-up process is one of the mainstream traditional methods for manufacturing composite materials. The principle of the process is to use the hand lay-up resin system to impregnate the fiber braiding layer, then lay the layers and press them together. After the impregnated resin system is cured, a composite is formed. Material matrix. Although it seems that the hand lay-up process is prone to process hidden dangers and quality problems, it is still widely used. Even in the preparation of large-scale advanced composite materials such as MW-level wind power blades, this pr...

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Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is to provide an anti-sag and anti-crystallization wind power grade hand lay-up resin system to overcome the contradiction between anti-sag viscosity and fiber wetting ability, low-temperature environment crystallinity and construction convenience, and Collaboratively solve the problems of curing speed and production efficiency, curing degree and temperature changes, and minimize the influence of artificial factors and temperature changes to a lower level

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