| abstract |
A method of molding and vulcanizing more than 40 rubber products successively by using a curing bladder, which has been treated at the surface thereof with a silicone composition including: (a) 100 parts by weight of a polyorganosiloxane composed mainly of polydimethylsiloxane with a viscosity at 25 DEG C. of from 3,000 to 5,000,000 cst, (b) from 30 to 300 parts by weight of a polymethylhydrogensiloxane with a viscosity at 25 DEG C. of from 10 to 70 cst, (c) from 2 to 25 parts by weight of a finely powderous silica, and, (d) from 0 to 30 parts by weight of an organic acid salt of one or more of metals selected from the group consisting of zinc, magnesium, manganese and cobalt. |