Patent ID: 11859102
Assignee: ISG ISOLIERCHEMIE GMBH & CO. KUNSTSTOFF KG
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 12:
13. A solvent-free undercoat composition for corrosion control at a repair site on plastic-sheathed steel pipes with and without cathodic protection, the composition comprising:
a component K1 being a water-based rubber dispersion with a rubber from the group of butyl, bromobutyl, isoprene or chloroprene rubber or combinations thereof, for formation of a barrier layer for isolating the repair site from oxygen, water vapor and water penetrating from externally;
a component K2 being a water-based resin dispersion comprising a hydrocarbon resin and/or a natural resin, for adhesion on a surface of the repair site and on a nonpolar surface of the plastic sheathing; and
a component K3 being an aqueous emulsion of prehydrolyzed organofunctional silanes,
wherein the following fractions of the components, specified in each case as solids content are based on a total mass of the solvent-free undercoat:
component K1 with a fraction of 10 wt % to 60 wt %;
component K2 with a fraction of 20 wt % to 90 wt %; and
component K3 with a fraction of 0.1 wt % to 10 wt %.