Polyolefin tube
AssigneeRehau AG & Co.
InventorsUdo Steffl, Volker Bohm
Life of this patent
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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).
Claims19
Silane cross-linked polyolefin tubes which are intended for drinking water and/or water for industrial use, which are resistant to a chlorine content between 0.1 and 5 ppm, which are made according to the single-stage process and which have a minimum cross-linking degree of 60%.
The silane cross-linked polyolefin tubes as defined in one of the preceding claims, characterized in that the tube has a cross-linking degree in the range of 60 to 89%, particularly between 65 and 75%.
Dependencies are inferred from the claim text.