Beta-nucleated propylene copolymer
A kind of propylene copolymer and copolymer technology, applied in the field of layer and steel pipe coating, can solve the problems of insufficient dynamic fracture toughness, loss of rigidity, inability to prepare polymer compositions, etc.
Active Publication Date: 2013-05-15
ボレアリステクノロジーオイ
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Problems solved by technology
However, this improvement comes at the cost of an unwanted loss of stiffness
Despite a general understanding of how to theoretically improve individual properties, it has so far not been possible to prepare polymer compositions with a good balance between stiffness and toughness
[0006] The main disadvantage of common polypropylene coatings or layers for pipes is the insufficient dynamic fracture toughness
Method used
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[0166] 1. Definition / measurement method
[0167] Unless otherwise indicated, the following definitions of terms and assay methods apply to the general description of the invention above and to the examples below.
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Abstract
Heterophasic propylene copolymer (HECO) comprising wherein the heterophasic propylene copolymer (HECO) is ²-nucleated and the elastomeric phase has an intrinsic viscosity measured in tetraline at 135 °C of equal or below 4.0 dl / g.
Description
technical field [0001] The present invention relates to novel β-nucleated propylene copolymers, their production and use, and also to pipes, layers in multilayer pipes and steel pipe coatings comprising said novel β-nucleated propylene copolymers. Background technique [0002] Polypropylene based polymers have several features that make them suitable for a variety of applications such as cables, pipes, fittings, moldings, foams, etc. Polypropylene as a pipe material is mainly used in non-pressure applications, eg for cable protection as well as culverts (eg roads and tracks), fittings and profiles. All three main propylene polymer types are used, ie homopolymers, random copolymers and block copolymers (ie heterophasic copolymers). [0003] Overall, the polypropylene-based materials chosen for pipes and cables should result in products with high impact resistance as well as good stiffness, while retaining as much pressure test performance as possible. However, these propert...
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IPC IPC(8): C08L23/10C08K5/00
CPCC08K5/0083C08L23/16C08L23/10C08L2205/02Y10T428/1393Y10T428/1352Y10T428/139Y10T428/31855C08L2666/02C08L2666/06
Inventor 波·马尔姆克劳斯·伯恩雷特纳弗兰兹·鲁尔莫
Owner ボレアリステクノロジーオイ