Polyolefin tube

US7985457B2 · kind B2 · utility

Assignee

• Rehau AG + Co. · US

Inventors

• Udo Steffl · Weidenberg, DE
• Volker Bohm · Schifferstadt, DE

Key dates

• Filing date: Jan 23, 2004
• Grant date: Jul 26, 2011
• Expiry date: Jul 2, 2027

Classification

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

Abstract

Silane cross-linked polyolefin tubes are used for drinking water and/or water for industrial use, are resistant to a chlorine content ranging from 0.1 to 5 ppm, have a minimum degree of cross-linking of 60%, are produced according to the single-stage process, and are comprised of the following polyolefin composition: (A) a polyolefin; (B) a mixture consisting of an organic silane of general formula RSiX3 (B1), of a radical-generating constituent (B2), and of a catalyst (B3); (C) a stabilizer mixture consisting of a high-molecular, phenolic constituent (C1) having a high melting point, of a sulfur-containing constituent (C2), of a phosphorous-containing processing stabilizer (C3), and of a metal deactivator (C4).