Tire curing bladder containing lecithin and use thereof

Details Tire curing bladder containing lecithin and use thereof Tire curing bladder containing lecithin and use thereof

C - Chemistry, Metallurgy

08

K

C08K 5/521 (2006.01) B29C 33/00 (2006.01) B29C 33/50 (2006.01) B29C 33/76 (2006.01) B29D 30/06 (2006.01) C08K 5/103 (2006.01) C08L 23/22 (2006.01) C08L 91/00 (2006.01)

Patent

CA 2312548

The invention relates to expandable butyl rubber bladders for use in curing presses for hydrocarbon rubbers such as pneumatic tires. The bladders are a crosslinked elastomer comprising isobutylene repeat units and the bladder composition contains lecithin, particularly a modified lecithin, preferably in liquid form, dispersed within the bladder composition. The bladder composition may also contain castor oil, corn oil and/or soya-bean oil. The bladder composition may also contain at least one of graphite and polytetrafluoroethylene powder. The invention also relates to a method of curing tires by utilizing such butyl rubber bladder.

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