| abstract |
A composition comprising a silicon-containing copolymer having a number average molecular weight of 500 to 1,000,000 having a formula (I) (II) as an essential unit and formulas (III) to (VII) as an arbitrary unit and a crosslinking agent is −20 The present invention relates to a technique for obtaining a cured product of a silicon-containing polymer having various physical properties by reacting at -100 ° C. for 1 to 3 hours, applying it to a substrate, and heating and curing at 150 ° C. or higher (eg, 250 ° C.). (However, A is NH or O, and the ratio is Si-O / (Si-N + Si-O) = 0.01-0.99). |