▎ 摘　　要

NOVELTY - Rubber composition, comprises ethylene-propylene diene monomer (EPDM) rubber, silicon dioxide, anti-aging agent, vulcanizing agent, and silicon dioxide surface-modified compound i.e. (1-{3-(2-sulfanylacetyl)oxy-2-{(2-sulfanylacetyl)oxymethyl}-2-{(3-sulfanylprop-1-en-2-yl)oxymethyl}propyl}-1H-imidazol-1-ium-1-yl)-{2}-chloranide (I). USE - The rubber composition is useful for preparing sealing strips (claimed). ADVANTAGE - The rubber composition solves the defect of uneven dispersion of white carbon black in EPDM rubber. DETAILED DESCRIPTION - Rubber composition, comprises ethylene-propylene diene monomer (EPDM) rubber, silicon dioxide, anti-aging agent, vulcanizing agent, and silicon dioxide surface-modified compound i.e. (1-{3-(2-sulfanylacetyl)oxy-2-{(2-sulfanylacetyl)oxymethyl}-2-{(3-sulfanylprop-1-en-2-yl)oxymethyl}propyl}-1H-imidazol-1-ium-1-yl)-{2}-chloranide of formula (I). INDEPENDENT CLAIMS are also included for: Preparing rubber composition, comprising (i) mixing 10-60 pts. wt. silicon dioxide with 2-5 pts. wt. (I), then placing 100 pts. wt. EPDM rubber, and 1-5 pts. wt. stearic acid into internal mixer, and mixing uniformly to obtain film, and (ii) adding 2-4 pts. wt. anti-aging agent, and 1-3 pts. wt. vulcanizing agent to the film, mixing uniformly in the open mill, vulcanizing and shaping to obtain final product; Sealing strip, comprising rubber composition; and Sealing strip obtained by above method.