| 摘要 |
PURPOSE:To prepare a bladder lubricant compsn. which is excellent in the lubricity with an unvulcanized tire and in the releasability with a vulcanized tire and is usable for a long time by compounding a specific organopolysiloxane resin, a specific organosilane, a condensation catalyst, and an org. solvent. CONSTITUTION:50 to 90 pts.wt. organopolysiloxane resin comprising 10 to 90wt.% units of formula I and 90 to 10wt.% (CH3)2SiO units, 2 to 35 pts.wt. organosilane of formula II (wherein R, R<1>, and R<2> are each a monovalent hydrocarbon group) or formula RSi(OR<1>)3 (e.g. methyltrimethoxysilane), 0.1 to 10 pts.wt. condensation catalyst (e.g. dibutyltin dilaurate), a suitable amt. of an org. solvent (e.g. toluene), and optionally 30wt.% or lower diorganopolysiloxane having hydroxyl or alkoxy groups at its both molecular terminals (e.g. a compd. of formula III) are compounded. |
