Hydrolysis-stable polyurethane for coating elements in maritime applications

US10442885B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andre Kamm · Bohmte, DE
• Julia Liese · Bremen, DE
• Karl Gust · Clawson, US

Key dates

• Filing date: Dec 11, 2013
• Grant date: Oct 15, 2019
• Expiry date: Nov 13, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1393
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing a polyurethane-coated conduit element includes mixing a) a mixture of aromatic and aliphatic polyisocyanate with, b) at least one polymeric compound having at least two hydrogen atoms which are reactive toward isocyanate, c) at least one chain extender, d) a catalyst, and e) optionally at least one other auxiliary, additive, or both, to form a reaction mixture; applying the reaction mixture to a conduit element; and allowing the reaction mixture to react to form a polyurethane layer. The polyurethane-coating conduit element is suitable for maritime applications in the oil and gas industry, which polyurethane has improved hydrolysis stability at high temperatures and nevertheless satisfies the high mechanical demands in the oil and gas industry.