▎ 摘　　要

NOVELTY - Main chain resin benzoxazine compound is claimed. The main chain resin benzoxazine compound is main chain benzoxazine/hydrocarbon resin binary resin or main chain benzoxazine/epoxy resin/hydrocarbon resin ternary resin, where the main chain benzoxazine/hydrocarbon resin binary resin is composed of 50-90 pts. wt. main chain benzoxazine and 10-50 pts. wt. hydrocarbon resin, the resulting main chain benzoxazine/hydrocarbon resin binary prepolymer is obtained by curing, the main chain benzoxazine/epoxy resin/hydrocarbon resin ternary resin is composed of 50-80 wt.% main chain benzoxazine, 10-20 pts. wt. epoxy resin and 10-30 pts. wt. hydrocarbon resin is obtained by curing a main chain benzoxazine/epoxy resin/hydrocarbon resin ternary copolymerization system obtained by cross-linking polymerization. USE - The benzoxazine compound is useful as functionalized graphene oxide-enhanced main chain benzoxazine composite resin for low-dielectric low-loss material under high-frequency electromagnetic wave conditions (all claimed). ADVANTAGE - The benzoxazine compound has high frequency electromagnetic wave having low dielectric constant, low dielectric loss, high heat resistance, high flame resistance and flexibility. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing main chain resin benzoxazine compound comprising adding 50-80 pts. wt. main chain benzoxazine, 10-20 pts. wt. epoxy resin, 10-30 pts. wt. hydrocarbon resin in a reaction container, dispersing in organic solvent, reacting at 80-110 degrees C for 1-6 hours to obtain 30-70 wt.% solid content of main chain benzoxazine compound resin prepolymer, curing the obtained resin pre-polymer in an oven, solidifying to obtain main chain benzoxazinone backbone benzoxazine/epoxy resin/carbon hydrogen resin ternary compound resin, then adding 50-90 pts. wt. main chain benzoxazine and 10-50 pts. wt. hydrocarbon resin in the reaction container, dispersing in the organic solvent, reacting at 80-110 degrees C for 1-6 hours to obtain 30-70 wt.% solid content of main chain benzoxazine compound resin prepolymer, and curing the obtained resin prepolymer in the oven to obtain main chain benzoxazine-main chain benzoxazine/hydrocarbon resin binary composite resin; (2) functionalized graphene oxide reinforced main chainbenzoxazine compound resin, where the compound resin is functionalized graphene oxide main chain modified benzoxazine/hydrocarbon resin binary resin or functionalized graphene oxide main chain modified benzoxazine/epoxy resin/carbon hydrogen resin, and includes 0.1-1 pts. wt. functionalized graphene oxide and 99-99.9 pts. wt. main chain benzoxazine/hydrocarbon resin binary resin or main chain benzoxazine/epoxy resin/hydrocarbon resin ternary resin, and the functionalized graphene oxide is carboxylated graphene oxide or graphene oxide amide; and (3) preparing functionalized graphene oxide reinforced main chainbenzoxazine compound resin comprising mixing functionalized graphene oxide and main chain benzoxazine/hydrocarbon resin binary resin or main chain benzoxazine/epoxy resin/hydrocarbon resin ternary resin to obtain mixed sample, evacuating the mixed sample at 80-140 degrees C for 2-4 hours, and then curing at 100-220 degrees C for 4-24 hours to obtain final product.