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Use of additive for improving stability of pipes against disinfectant-containing water

A stabilizer, polyolefin technology, applied in the application field of resistance

Inactive Publication Date: 2020-10-13
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in recent years it has been concluded that antioxidants employed in polyolefin compositions for pipes known to provide good resistance to chlorinated water do not necessarily provide satisfactory protection against chlorine dioxide-containing water. patience

Method used

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  • Use of additive for improving stability of pipes against disinfectant-containing water
  • Use of additive for improving stability of pipes against disinfectant-containing water
  • Use of additive for improving stability of pipes against disinfectant-containing water

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0141] Sample preparation:

[0142] According to the chlorine-containing substance resistance test described in paragraph (a), the composition to be tested is formed into a pipe and exposed to water containing chlorine dioxide. After 1 month, the chlorine-containing substance resistance test was stopped, and a test sample for OIT measurement was prepared from the tested pipe material. For this purpose, a polymer sample of 0.6 mm thickness is cut from the inner surface of the pipe to be tested with a lathe and removed. Next, additional polymer samples of 0.2 mm thickness were cut from the cut area with a lathe and collected. From these 0.2 mm thick samples, compression molded panels of 1 ± 0.1 mm thickness were produced at a temperature of 190°C. Cylindrical test specimens for the OIT test having a diameter of 5 mm, a thickness of 1 ± 0.1 mm and a weight of 10 ± 2 mg were cut from these compression molded plates.

[0143] c) OIT measurement (Test 2)

[0144] Sample preparat...

Embodiment (IE

[0185] The bimodal base resin used for mixing has a density of 948 kg / m and an MFR of 0.3 g / 10 min 5 . The matrix resin of the IE was produced in the manner described in the examples of EP 1 655 333 . The density of the polyethylene composition of the IE is 959kg / m3, and the MFR 5 It is 0.3g / 10min. The polyethylene composition that described IE makes is classified as PE-100 material (MRS 10.0N / mm 2 ).

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Abstract

The present invention provides the use of an ultraviolet stabilizer (A) for improving the resistance of a polyolefin composition to degradation caused by contact with chlorine-containing water, in particular chlorine dioxide-containing water.

Description

[0001] The application number of this application is 201380067075.5 (international application number: PCT / EP2013 / 003950), the application date is December 20, 2013, and the title of the invention is "Additives used to improve the stability of pipes against water containing disinfectants Application of the "invention patent application" divisional application. technical field [0002] The present invention relates to the use of additives in polyolefin compositions for improving the resistance of pipes to water containing chlorinated substances. Background technique [0003] In many parts of the world, tap water is required to contain disinfectants to keep users safe. For transporting water, plastic pipes are quite suitable because they are less prone to corrosion than metal pipes. However, plastic tubing, that is, tubing manufactured from polymeric materials, has been inherently susceptible to aging, resulting in loss of strength, stiffness, and flexibility, discoloration, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3435C08L23/02C08L23/06C08L67/02
CPCC08K5/0041C08K5/3435C08L23/02
Inventor 托马斯·耶特贝里杰伦·欧德科克弗朗西斯·科斯塔马克·叶鲁佐英·图安·德兰
Owner BOREALIS AG