Polypropylene of improved processability for production of pipes
A polypropylene-based, propylene technology, applied in the field of preparing this polymer composition, can solve the problems of low notch resistance, breaking strength, poor mechanical properties, etc.
Active Publication Date: 2013-07-10
BOREALIS TECH OY
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, too low melt temperature generally produces poorer surface properties, such as poor surface smoothness, and as a result, poorer mechanical properties, such as low notch failure resistance
Method used
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[0115] 1. Measurement method
[0116] (a) Melt flow rate
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Abstract
The present invention relates to a polymer composition, comprising (i) a polypropylene-based matrix which comprises a polypropylene random copolymer prepared by copolymerization of propylene with an olefin comonomer, wherein the amount of olefin comonomer units is within the range of 0.2 wt% to 5 wt%, based on the weight of the polypropylene-based matrix, and (ii) an elastomeric copolymer of propylene and at least one olefin comonomer, the polymer composition having a storage modulus G' at a loss modulus G"=5 kPa of G'(5 kPa) ‰¤ 3100 Pa, measured at 220°C.
Description
field of invention [0001] The present invention relates to polymer compositions having improved processability for producing pipes of high surface smoothness and good mechanical properties. Furthermore, the invention relates to a method of preparing such a polymer composition as well as pipes made therefrom. Background technique [0002] Pipes made of polymeric materials are commonly used for various purposes such as fluid transport, ie transport of liquids and gases. The fluid may be pressurized (such as in the case of natural gas or tap water) or unpressurized (such as in the case of sewage, stormwater or domestic waste (feces and waste water)). Also, the fluid being delivered may have a varying temperature, typically in the range 0-50°C. Unpressurized pipes can also be used to protect cables and conduits, and for drains (e.g. roads and railways). [0003] The many properties of polypropylene based polymers make them suitable for piping, fittings, moldings, foam applica...
Claims
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IPC IPC(8): C08L23/10C08L23/12
CPCC08L2308/00C08F210/06C08F110/06C08L23/10C08L23/142C08L23/12C08L2666/06C08F2500/12C08F2500/11C08F210/16
Inventor J·哈朱托斯塔C·-G·艾克K·阿拉斯塔洛K·伦德
Owner BOREALIS TECH OY