To obtain a soft lining material composition for dentistry, hardly being discolored after a long-term use, being soft and good in cushioning properties, and excellent in properties to be ground and polished.
This soft lining material composition for dentistry comprises (A) a polyorganosiloxane having at least one alkenyl group bonded to a silicon atom in one molecule, (B) an organohydrogenpolysiloxane having hydrogen atoms bonded to silicon atoms only at both the terminals of a molecular chain, (C) an organohydrogenpoly siloxane having at least three hydrogen atoms bonded to silicon atoms in one molecule, (D) a hydrosilylation catalyst and (E) an inorganic filler, and is regulated so that the total amount of the hydrogen atoms bonded to the silicon atoms present in the components (B) and (C) may be 1-10 per one alkenyl group in the component (A), and the number of the hydrogen atoms bonded to the silicon atoms in the component (B) may be at least 20% of the hydrogen atoms bonded to the silicon atoms in the components (B) and (C).
SUGAWARA HIDEKI
ARAKAWA MASAYA
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