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Low migration polyolefin composition

A composition and polyolefin technology, applied in the field of polyolefin composition, can solve the problem of harmful migration behavior

Inactive Publication Date: 2009-09-02
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a particular additive compound may have improved chemical stability, thus having a beneficial effect on migration behavior, but on the other hand, it may decompose into compounds that readily diffuse from the polymer matrix, thereby having a detrimental effect on migration behavior
Furthermore, it must be taken into account that the improvement in migration behavior cannot be obtained at the expense of the stability of the polymer matrix

Method used

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Examples

Experimental program
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Embodiment

[0059] The polyolefin (A) used as matrix polymer in all examples is bimodal high density polyethylene produced in the Borealis Borstar plant (cf. EP 1095102 B1, Example 1), and 32 x 3mm (outer diameter x wall thickness) tubing.

[0060] In the inventive examples and comparative examples, the following components were used.

[0061] Compound (B):

[0062] - Bis(2,4-dicumylphenyl)pentaerythritol-diphosphite (Doverphos S-9228) purchased from Dover Chemical Corp. TM )

[0063] - Tris(2,4-di-tert-butylphenyl) phosphite (Irgafos 168) purchased from Ciba Specialty Chemical TM )

[0064] Phenolic compounds (C):

[0065] -Pentaerythritol-tetrakis(3-(3',5'-di-tert-butyl-4-hydroxyphenyl)propionate (Irganox 1010) purchased from Ciba Specialty Chemicals Co., Ltd. TM ),

[0066] - 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenyl)benzene (Ethanox 330 TM ),or

[0067] -Ethylene glycol bis(3,3-bis(4'-hydroxy-3'-tert-butylphenyl (phaneyl))butyrate (Hostanox O3) purchased fr...

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Abstract

The present invention relates to a composition comprising a) a polyolefin (A); b) a compound (B) according to formula (I): wherein R and R' each is the same or different residue and comprising at least 6 C-atoms; c) a phenolic compound (C), having the formula (II) wherein R is an non-substituted or substituted aliphatic or aromatic hydrocarbyl radical which may comprise heteroatoms, or R is an heteroatom; X is H, OH, and / or R'; whereby R' is a hydrocarbyl radical or hydrogen, and n is 1 to 4; and d) optionally, an UV-light stabilizer (D), wherein for the composition the total amount of migrated compounds (B), (C) and, if present, (D), as well as their decomposition products is equal to or less than 1.8 microgram per liter with a ratio S / V dm -1 of 11.70 to 12.30, to the use of said composition for the production of a pipe and to a pipe comprising said composition.

Description

technical field [0001] The present invention relates to a polyolefin composition wherein the migration of the additives used in said composition is low, so that the composition is particularly suitable for pipe applications. Background technique [0002] Recent advances in manufacturing and processing polymers have enabled plastics to be used in nearly every aspect of modern life. However, polymers are prone to aging under the influence of light, oxygen and heat. This results in loss of strength, stiffness and flexibility, fading and scratching, and loss of gloss. [0003] Polymers, such as polyolefins such as polyethylene and polypropylene, among others, undergo free radical-driven degradation processes during processing steps that may include molding, extrusion, and the like. However, degradation occurs through free radical mechanisms under the influence of light or heat even during end use and will eventually destroy polymer properties. [0004] Antioxidants and light ...

Claims

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Application Information

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IPC IPC(8): C08K5/00C08L23/02F16L9/12
CPCC08K5/5393C08K5/005C08K5/34Y10T428/1359Y10T428/13Y10T428/1352Y10T428/139Y10T428/1303C08L23/02C08L23/00C08K5/529C08K5/13F16L9/12
Inventor 马丁·安克尔斯韦恩·贾姆特韦杜特
Owner ボレアリステクノロジーオイ
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