| 摘要 |
PURPOSE:To obtain a sealing composition for a can lid which is excellent in storage stability, hot water resistance, oil resistance, etc., by making use of a rubber component comprising compound rubber composed of styrene-butadiene copolymer rubber and isobutylene-isoprene copolymer rubber in a particular ratio. CONSTITUTION:Styrene-butadiene copolymer rubber and isobutylene-isoprene copolymer rubber are compounded in a weight ratio of 40-70/60-30. The compounded rubber thus obtd. is used as a rubber component and is compounded with necessary additives, such as an adhesive (e.g., rosin), a thickening agent (e.g., karaya gum), a filler (e.g., silica), a stabilizer, and a vulcanizing agent, thereby obtaining a sealing agent for a can lid. Good sealing property can be given by applying this compsn. to the internal surface of a curled portion of the can lid in the double seamling of the can lid on the can body for canning even when the contents are oleaginous.
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