A preparing method of a cyanate resin composite

Abstract

The invention relates to the field of polymer materials and particularly relates to a preparing method of a cyanate resin composite. The method is characterized by comprising steps of stirring 50-100 parts by weight of cyanate resin and 1-30 parts by weight of a flexibilizer at 50-200 DEG C, after uniform melting and dispersion, cooling the mixture to 70-150 DGE C, adding 0.1-10 parts of an antioxidant and 0.1-20 parts of an ultraviolet absorber, cooling the mixture to 70-150 DGE C after uniform melting and dispersion, then adding 0.1-10 parts of a coupling agent and 0.1-10 parts of a thixotropic agent, fully dispersing the mixture to obtain a cyanate resin composition resistant to illumination aging, and subjecting the resin composition to a coating step, a fiber compositing step and curing to obtain the composite resistant to illumination aging. The prepared composite has better illumination aging resistance and good manufacturability, and can be subjected to film coating and composite processes to prepare prepregs. A preparing process is simple and the production cost is low.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a preparation method of a cyanate resin composite material with light aging resistance. Background technique [0002] As we all know, cyanate resin has good mechanical properties, dielectric properties, heat resistance, etc., and it forms four high-performance resin matrix materials together with phenolic resin, epoxy resin, and bismaleimide resin. Because of its outstanding dielectric properties, dielectric constant (2.8-3.2), dielectric loss (0.002-0.008), it can be used in structural materials, wave-transmitting materials, dielectric functional materials, etc., used in aerospace, electronic information, etc. field. However, at present, cyanate ester resins have disadvantages such as poor manufacturability, poor toughness, short pot life and storage period, poor hardness, and poor wear resistance. Especially long-term exposure to the sun will accelerate the aging of...

AI Technical Summary

Problems solved by technology

Although ultraviolet light only accounts for about 5% of sunlight, its energy is very large, and its energy is enough to destroy the chemical bonds of the polymer, causing its molecular chains to break and crosslink, resulting in a malignant change in its mechanical properties, and at the same time, its color also changes.