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Polyolefin composition for water pipes with improved chlorine resistance

A composition, polyolefin technology, applied in the direction of hoses, pipes, pipes/pipe joints/fittings, etc., can solve problems such as deterioration of polyolefin compositions

Inactive Publication Date: 2011-11-23
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term contact with the inner surface of the pipe leads to the deterioration of the polyolefin composition

Method used

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  • Polyolefin composition for water pipes with improved chlorine resistance
  • Polyolefin composition for water pipes with improved chlorine resistance
  • Polyolefin composition for water pipes with improved chlorine resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1 is carried out according to the present invention, and Examples 2, 3 and 4 are comparative examples.

[0070] Table 1:

[0071]

[0072] Tubes of 12 x 2 mm (outer diameter x wall thickness) were produced by extrusion using a Battenfeld 45-25B extruder providing an output of 14 kg / hour at a screw speed of 16 rpm. The extruder melt temperature was 212°C.

[0073] The circumferential stress and properties of the pipes in the examples are listed in Table 2. The last column shows reference values ​​for time to failure relative to Example 2.

[0074] Table 2:

[0075]

[0076] The result of embodiment shows, the performance of example 1 is better than the performance of embodiment 2, 3 or 4.

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PUM

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Abstract

The present invention relates to the use of compound (A) and compound (B) in a polyolefin composition for increasing the lifetime of a pipe made of said polyolefin composition which pipe is in permanent contact with chlorinated water, wherein compound (A) has the following formula (I): wherein R6, R7 and R8 independently are non-substituted or substituted aliphatic or aromatic hydrocarbyl radicals which may comprise OH-groups, -X1, X2, and X3 independently are H or OH, with the proviso that at least one of X X1, X2, and X3 is OH, and - the entire molecule does not comprise an ester group, wherein compound (B) has the following formula (II): wherein R and R' each is the same or different residue and comprising at least 6 carbon atoms.

Description

technical field [0001] The present invention relates to a polyolefin composition for use in water pipes having improved resistance to chlorinated water, and more particularly to the use of combinations of specific types of antioxidants in such compositions to achieve this advantageous effect. Background technique [0002] Recent advances in the production and processing of polymers have allowed plastics to be used in virtually every aspect of modern life. However, polymer compounds are prone to aging under the influence of oxidizing agents, light and heat. This can lead to loss of life, such as loss of strength, stiffness and flexibility, fading, wear and tear, as well as loss of luster. [0003] It is well known in the art that antioxidants and light stabilizers can avoid or at least reduce these effects. Several types of additives are added to polymers to protect them during processing and to achieve desired end-use properties. Additives are usually divided into stabili...

Claims

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Application Information

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IPC IPC(8): C08K5/00C08K5/13C08K5/527
CPCC08K5/13C08K5/527C08K5/005C08L23/02C08L23/04F16L11/04
Inventor 马丁·安克尔斯韦恩·贾姆特韦特
Owner BOREALIS AG
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