FIELD: chemistry.
SUBSTANCE: invention discloses a hardening composition which contains polydiorganosiloxane with terminal silanol groups; a cross-linking agent selected from alkylsilicates; an intercrosslinking reaction catalyst; organic nano-clay; and, optionally, a solid polymer whose gas permeability is lower than that of the cross-linked polydiorganosiloxane. The invention also discloses a hardened compound having the given composition.
EFFECT: permeability coefficient of the disclosed hardened composition is significantly lower than that of existing analogues, which enables more prolonged retention of insulating properties.
16 cl, 2 dwg, 3 tbl, 9 ex
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|---|---|---|---|
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