| 摘要 |
PURPOSE:To improve the releasability of a mold from a master model and the releasability of a molded product from the mold by compounding a polyorganosiloxane with three specific components and platinum or a platinum compd. CONSTITUTION:100 pts.wt. polyorganosiloxane of formula I (wherein R<1> is methyl, ethyl, phenyl or 3,3,3-trifluoropropyl; m is such as number that the viscosity of said polyorganosiloxane is 500-200,000cP) (A) is compounded with 2-50 pts.wt. polyorganosiloxane which has a mean degree of polymn. of 20 or lower and in which at least 5mol% of siloxane units are units of formula II or III, 0.1-20 pts.wt. polyorganohydrogensiloxane comprising units of formula IV and SiO2 units and contg. H attached to Si in an amt. of 0.3-1.2wt.% of the MW, 0.05-4 pts.wt. polyorganosiloxane of formula V (wherein R<2> is R<1>; n is 0-200), and platinum or a platinum compd. in an amt. corresponding to 1-100ppm platinum (based on component A). |
