Denso-Holding Gmbh & Co

Isg Isolierchemie Gmbh & Co. Kunststoff Kg

Oleg Gryshchuk

Thomas Markus Kaiser

A solvent-free undercoat composition for corrosion control at welds and other repair sites on plastic-sheathed steel pipes with and without cathodic protection, including a component K1: a water-based rubber dispersion for formation of a barrier layer for isolating the metallic repair site from oxygen, water vapor and water penetrating from externally; a component K2: a water-based resin dispersion for adhesion on the metallic surface of the repair site and on the nonpolar surfaces of the plastic sheathing; a component K3: an aqueous emulsion of prehydrolyzed organofunctional silanes for accelerating the drying, for improving the adhesion to the metallic surface, particularly at elevated temperatures, and for increasing the resistance to cathodic disbondment.

Solvent-free prepaint for corrosion protection at welds and other repair points on cathodically protected and cathodically unprotected, plastic-sheathed steel pipes

The invention relates to an anti-corrosion system comprising an at least one-layered first tape, comprising at least one elastomer selected from the group comprising (block-) co- and/or terpolymers with at least one carbon-carbon double bond, as well as at least one cross-linking agent, selected from the group comprising at least one reactive resin, wherein the anti-corrosion system furthermore comprises at least one primer, comprising at least one catalyzing agent to activate the cross-linking agent.

Anti-corrosion system comprising an at least one-layered first tape and at least one primer

Anti-corrosion composition comprising at least a first polyisobutylene with a Staudinger index Jranging from about 15 cm/g to about 98 cm/g and an average relative molar massranging from about 32,000 g/mol to about 280,000 g/mol and at least a second polyisobutylene with a Staudinger index Jranging from about 105 cm/g to about 238 cm/g and an average relative molar massranging from about 350,000 g/mol to about 900,000 g/mol.

Anti-corrosion composition comprising polyisobutylenes

An adhesion promoting composition for an anti-corrosion includes about 20% by weight to about 70% by weight of at least one polyolefin selected from polyethylene and/or polypropylene; about 20% by weight to about 65% by weight of at least one butyl rubber; and about 6% by weight to about 35% by weight of at least one elastomer selected from a group comprising ethylene-propylene-rubber and/or ethylene-propylene-diene rubber; each based on the total quantity of the adhesion promoting composition.

Adhesion promoting composition for an anti-corrosion product

The invention relates to an anti-corrosion composition comprising at least one first butyl rubber having an apparent viscosity according to Brookfield measured at 66&#xb0; C. according to DIN EN ISO 2555 in a range of approximately 400,000 mPa&#xb7;s to approximately 2,000,000 mPa&#xb7;s and has an average molecular weight in a range of approximately 20,000 to approximately 60,000 and at least one second butyl rubber having an average molecular weight in a region of approximately 150,000 to approximately 2,000,000 and a Mooney viscosity ML (1+8) measured at 125&#xb0; C. in a range of approximately 25 MU to approximately 65 MU, measured according to ISO 289.

Anti-corrosion composition

An anti-corrosion composition includes a first compound including: a first polyisobutylene having an average relative molar mass ranging from about 30,000 to about 100,000 g/mole and a Staudinger index ranging from about 15-70 cm/g, a first depolymerized butyl rubber with Brookfield viscosity at 66&#xb0; C. ranging from about 400,000-2,000,000 mPa&#xb7;s and an average molecular weight ranging from about 20,000-60,000, and combinations thereof. A second compound includes a second polyisobutylene having an average relative molar mass ranging from about 900,000-6,500,000 g/mole and a Staudinger index ranging from about 240-900 cm/g, at least one second partly cross-linked butyl rubber with a Mooney viscosity at 127&#xb0; C. ranging from about 65-100 MU. The anti-corrosion composition includes at least one first or at least one second polyisobutylene as well as at least one first or at least one second butyl rubber.

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Leverkusen, Germany

Oleg Gryshchuk