▎ 摘　　要

NOVELTY - The preparation of two-component sealant, involves (S1) taking target raw material component (A) and component (B), where the weight ratio of component (A) and component (B) is 1:1. The component (A) comprises 50-100 pts. wt. polyether polyol, 2-60 pts. wt. solid filler, 1-5 pts. wt. catalyst and 2-7 pts. wt. defoamer. The component (B) comprises 18-79 pts. wt. polyisocyanate, 30-80 pts. wt. thinner and 10-30 pts. wt. graphene, (S2) adding the raw materials of component (A) and component (B) to mixing device, and quickly mixing to obtain pretreatment component (A) and pretreatment component (B) respectively, (S3) adding pretreatment component (A) and pretreatment component (B) to corresponding reaction kettle respectively, performing heat treatment (I) at 110-120 degrees C for 10 minutes, and reducing temperature to 80 degrees C, vacuum dehydrating, stirring for 2-3 hours and storing in sealed container. USE - Preparation of two-component sealant. ADVANTAGE - The method enables preparation of two-component sealant with high tensile strength, increased toughness and excellent mechanical properties and synergistic effect, using mixing device ensuring even mixing of the components. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for mixing device utilized in preparation of two-component sealant, which includes a mixing box and a leg provided at the lower end of mixing box. The upper left side of the leg is provided with a feeding port for feeding and is matched with a feeding mechanism. The mixing box is provided with mixing mechanism for quickly mixing materials, and an auxiliary support block is annularly arranged on inner wall of mixing box. The upper end surface of auxiliary support block is comprised with a diversion inclined surface recessed toward middle, and the auxiliary support block at lower end of diversion inclined surface is provided with a piston channel. A piston block is fitted in piston channel, and the outer side of upper end of piston block is provided with dispersion pile for assisting mixing. The inner wall of lower end of auxiliary support block is provided with discharging channel for discharging, and the lower end of the mixing box is provided with a discharging hopper communicated with discharging channel. The upper end of piston block is provided with a stirring outer shaft at upper end, and the upper end of stirring outer shaft is provided with sliding hole with elliptical cross section. The sliding hole is matched with a stirring shaft with elliptical interface, and the upper end of stirring shaft is fixedly connected with output end of stirring motor. The outer side of upper end of mixing outer shaft is provided with fixed bearing, and the outer ring of fixed bearing is connected with output end of lifting push rod through transmission rod. The lifting and pushing rod is configured to drive outer mixing shaft to move up and down, thereby driving piston block to float up and down in piston channel. When the upper end surface of piston block is descended to position of discharging channel, several telescopic stirring elements are distributed in an array outside the outer stirring shaft.