| abstract |
(A) A linear polyfluoro compound having two or more alkenyl groups in one molecule and a perfluoropolyether structure in the main chain: 100 parts by mass, (B) in one molecule Fluorine-containing organohydrogensiloxane having two or more hydrogen atoms directly bonded to silicon atoms: an amount of 0.5 to 3.0 moles as SiH groups with respect to 1 mole of alkenyl groups of component (A), (C) platinum group metal catalyst: 0.1 to 500 ppm in terms of platinum group metal atom, and the above (A) component and the above (B) component at 25 ° C. and 589 nm (sodium D line) A curable composition for transparent materials, wherein the difference in refractive index is 0 to 0.10. [Effect] The rubber composition for a transparent material of the present invention can provide a transparent cured product excellent in heat resistance, oil resistance, chemical resistance, solvent resistance, low temperature characteristics, low moisture permeability and the like. [Selection figure] None |