[12] Patent
[11] Patent No.:GC0007590  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126042
Date of the Decision to Grant the Patent:16/Apr/2018

[21] Application No.:GC 2012-22884

[22] Filing Date:25/11/2012

[30] Priority:

[33] State [32] Priority date [31] Priority No.
EP
22/12/2011
11010092.2

[72] Inventors:1- Hjertberg Thomas،2- Costa Francis،3- Oderkerk Jeroen،4- Gedde Ulf

[73] Owner: Borealis AG, IZD Tower, Wagramerstrasse 17-19 1220 , Wien , Austria

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: C08K5/00, C08K5/13 (2006.01)

[56] Cited Documents:

-EP 0 303 895 A1 (AMERICAN CYANAMID CO [US]) 22 February 1989
-US 6 228 495 B1 (LUPIA JOSEPH [US] ET AL) 08 May 2001
-WO 2010/149607 A1 (BOREAL!S AG [AT]; PIEL TANJA [SE]; ANKER MARTIN [SE]; ODERKERK JEROEN) 29 December 2010
 
Examiner: Nouf AlNassban

[54] POLYOLEFIN COMPOSITION WITH INCREASED RESISTANCE AGAINST DEGRADATION CAUSED BY CHLORINE DIOXIDE
[57] Abstract: The present invention relates to a polyolefin composition with increased resistance to degradation caused by ClO2-containing water and to an article made of such a polyolefin composition. The polyolefin composition comprises a polyolefin base resin (A), at least one antioxidant (B) having an initial oxygen induction time (OIT190°C) of more than 35 min., determined according to the OIT190°C test described herein and having a slope of the curve, when OIT190°C, in minutes, is recorded as a function of exposure time, in minutes, in a chlorine dioxide degradation test as described herein, of at least -0.07, and c) at least one antioxidant (C) having an initial oxygen induction time (OIT190°C) of not more than 35 min., determined according to the OIT190°C test described herein and having a slope of the curve, when OIT190°C, in minutes, is recorded as a function of exposure time, in minutes, in a chlorine dioxide degradation test as described herein, of less than -0.07, wherein said polyolefin composition shows a resistance against water containing 10 ppm chlorine dioxide at 70 °C and a pH of 6.8 + 0.1 of at least 450 min., expressed as the time to reach 50% of the initial oxygen induction time at 210 °C (OIT(210°C),50%), determined according to the chlorine dioxide degradation test as described herein. The present invention further relates to the use of the polyolefin composition for the production of an article, e.g. a pipe, a fitting or a storage container and to the use of the polyolefin composition for increasing the resistance of an article against degradation caused by contact with ClO2-containing water.
No. of claims: 9     No. of figures: 3


 

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