Pipe for hot fluids

Details Pipe for hot fluids Pipe for hot fluids

2002-10-15

2008-08-12

Nutter, Nathan M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S240000, C526S348000, C526S348200, C526S348400, C526S348600, C526S352000, C526S352200

Reexamination Certificate

active

07411023

ABSTRACT:
A polymer pipe for hot fluids, usually hot water is described. The pipe is characterised in that it comprises a multimodal polyethylene with a high molecular weight (HMW) fraction and a low molecular weight (LMW) fraction where said HMW fraction has a density of at least 0.920 g/cm3, and that the multimodal polyethylene has a density of 0.921-0.950 g/cm3and has a time to failure at 95° C. and 3.6 MPa of at least 165 h determined according to DIN 16 833 and a modulus of elasticity of at most 900 MPa determined according to ISO 527-2/1B. Preferably, the multimodal polyethylene is a bimodal polyethylene, the LMW fraction having a density of 0.955-0.975 g/cm3, the HMW fraction having a density of 0.920-0.940 g/cm3, and the weight ratio of the LMW fraction to the HMW fraction being from 30:70 to 55:45.

REFERENCES:
patent: 5306775 (1994-04-01), Martin et al.
patent: 6329054 (2001-12-01), Rogestedt et al.
patent: 6441096 (2002-08-01), Backman et al.
patent: 6545093 (2003-04-01), de Lange et al.
patent: 6642323 (2003-11-01), Myhre et al.
patent: 6878784 (2005-04-01), Asumalahti et al.
patent: 2002/0004571 (2002-01-01), Shroeder et al.
patent: 2003/0149162 (2003-08-01), Ahlstrand
patent: 2004/0157988 (2004-08-01), Miserque et al.
patent: 2004/0266966 (2004-12-01), Schramm et al.
patent: 0 533 155 (1993-03-01), None
patent: 1 146 078 (2001-10-01), None
patent: WO 00/01765 (2000-01-01), None

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