▎ 摘　　要

NOVELTY - Silicone rubber composite gasket comprises 100 pts. wt. silicone rubber matrix, 200-1000 pts. wt. magnetic wave absorber, 30-200 pts. wt. sheet shaped thermal conductive filler, 5-30 pts. wt. reinforcing agent, 0.5-7 pts. wt. hydroxy silicone oil and 0.5-2 pts. wt. vulcanizing agent. USE - Silicone rubber composite gasket. ADVANTAGE - The gasket is corrosion-resistant. The thermal conductive filler enables the silicone rubber composite gasket to have both high-efficiency wave absorbing performance and excellent thermal conductivity. The absorption rate for electromagnetic waves from 1-18 giga hertz reaches to more than 50% (reflection loss ≤ 3 dB), and thermal conductivity ≥ 2 W/(m.K). The preparation method is simple, and it is easy to realize continuous and large-scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of silicone rubber composite gasket, which involves: i. cleaning and drying the magnetic wave absorber and sheet-shaped thermally conductive filler; ii. pretreating magnetic wave absorber by high temperature alkaline bluing process; iii. modifying surface of the thermally conductive filler and the treated magnetic wave absorber by using a silane coupling agent; iv. adding reinforcing agent, hydroxyl silicone oil, pretreated magnetic wave absorber, sheet shaped thermally conductive filler and vulcanizing agent into the silicone rubber matrix; fully and uniformly mixing to obtain a mixed rubber compound of the wave absorbing and heat conducting silicone rubber; vi. forming a thin film from the obtained mixed rubber compound by an open mill or a calender, and rolling the film into a film material; vii. placing the rubber roll material into a mold, carrying out hot pressing on the rubber roll material, carrying out mold pressing vulcanization molding on the rubber roll material, and finally carrying out slicing in a direction perpendicular to the axis of the rubber roll material.