A solvent-free composition based on silicone resin useful for priming silicone adhesive and porous alkaline bases such as concrete

摘要

Compositions based on at least one silicone resin of types: T-resin, TQ-resin, MQ-resin, DTQ-resin, or MDT-resin, or a mixture of these, where l, m, and n are selected so that the resin or mixture of resins is liquid, the composition contains optionally substituted hydrocarbons, and silicic acid of surface 50-400 m2/g, with the proviso that it contains no volatile organic substance is new. Compositions based on at least one silicone resin of types: T-resin:(RSiO3/2)n with alkoxy or silane end groups, TQ-resin:(RSiO3/2)n(SiO4/2)m with alkoxy or silane end groups, MQ-resin:R3SiO/2)b with alkoxy or silane end groups, DTQ-resin:(R'SiO2/2)l(RsiO3/2)n(SiO4/2)m with alkoxy or silane end groups, or MDT-resin:R3O1/2)n(R'SiO2/2)l(Rsi)3/2)m, or a mixture of these, where l, m, and n are selected so that the resin or mixture of resins is liquid, R, R' = optionally substituted hydrocarbon, the composition contains optionally substituted hydrocarbons, has a viscosity of 10-106 mPa, and silicic acid of surface 50-400 m2/g, with the proviso that it contains no volatile organic substance. An Independent claim is included for a process for priming hard surfaces using the new composition.