| 摘要 |
PROBLEM TO BE SOLVED: To increase the number of times of vulcanizing and to decrease a defective ratio by incorporating specific amounts of a polysiloxane an organosiloxane having an aminoalkyl group and an organosiloxiane having an epoxy group, and setting a dynamic frictional coefficient between butyl rubber after coating and drying and an uncapping butyl rubber to a specific value. SOLUTION: The mold release agent composition contains a fiorganopolysiloxane having 1×10<3> to 1×10<7> centipedes of a complex viscosity at 25 deg.C represented by a general formula, an orgnosiloxane B having an aminoalkyl group, and an organosiloxane C having an epoxy group, wherein R<1> is a monovalent hydrocarbon group having 1-20C unsubstrated or substituted group, R<2> is a hydroxyl group or a 1-5C alkoxy group, n is 100 to 10,000. In this case, a total amount of contents of components A, B, C is 1 to 90 wt.%, and a weight ratio A/B/C is 10 to 90 wt.%/0.5 to 40 wt.%/1 to 50 wt.%. Further, a dynamic frictional coefficient between a butyl rubber after coating and drying and an coating butyl rubber is set to 1 or less. |
