Glass fiber reinforced polypropylene

a technology of glass fiber reinforced polypropylene and polypropylene, which is applied in the direction of mixing, chemistry apparatus and processes, etc., can solve the problems of reducing stiffness, not meeting stringent requirements, and increasing the impact properties insufficient amounts

Inactive Publication Date: 2010-12-16
BOREALIS TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]This object has been solved with the composition as defined in claim 1. Preferred embodiments are disclosed in subclaims 2 to 8. Further the present invention provides articles produced from the composition as well as the use of the composition for preparing molded articles as defined in claims 9 and 10, respectively.

Problems solved by technology

However, impact behavior of glass fiber reinforced polypropylene compositions did not meet the stringent requirements in particular for products require high stiffness in combination with good impact properties.
However, the use of cross-linking agents might give rise to troubles during production and the effects achieved did still not lead to a sufficient increase of impact properties.
The use of such external rubbers compounded with a polypropylene homopolymer however decreases the stiffness while only marginally improving impact properties, if at all.
The impact properties however are not sufficient for applications requiring a combination of good stiffness and good impact properties.
However, the document fails to specify any distinct amounts of fillers and does not disclose the combination of favorable properties of compositions according to the present invention.
However, none of these compositions provide a balance of stiffness and impact properties required for applications such as in the automotive industry, where it is not acceptable to sacrifice either stiffness or impact properties when improving the other property.

Method used

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Examples

Experimental program
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examples

[0079]

CE1E1CE2E2CE3E3MFRg / 10 min2.732.52.92.12.4Tensile modulusMPa607059405100432054004760Tensile strengthMPa727260495851Tensile strain at tensile strength%4.25.76.36.75.05.7Tensile stress at breakMPa716457455648Tensile strain at break%4.96.67.68.26.37.1Flexural modulusMPa557050304620392050004400Flexural strengthMPa948269557260Flexural strain at flexural strength%4.44.64.74.84.54.7Flexural stress at 3.5% strengthMPA937967537058IS 23° C.kJ / m2608189997984IS −20° C.kJ / m2617576847078NIS 23° C.kJ / m2223139473239NIS −20° C.kJ / m2141720251822HDT° C.139136124117130124HYDROPULSForce at Max. 23° C.N178021502240253020402450Puncture Energy 23° C.J12.715.815.916.216.116.6Force at Max. −20° C.N201021502130220020602100Puncture Energy −20° C.J8.711.411.913.912.813.2KSR 4525Wt %675757Vetrotex P968Wt %323232323232EXXELOR PO1020Wt %111111EE013AEWt %675757ENGAGE 8200Wt %1010DUTRAL PM06PLEWt %1010

[0080]EE013AE and KSR4525 are heterophasic polypropylene compositions comprising ethylene as comonomer, availa...

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Abstract

The present invention concerns an improved glass fiber reinforced polypropylene composition as well as articles formed from this composition, wherein the composition, comprises a) More than 15-wt % glass fibers, and b) a specific heterophasic polypropylene composition with an at least bimodal disperse phase.

Description

[0001]The present invention concerns an improved glass fiber reinforced polypropylene composition as well as articles formed from this compositionPRIOR ART[0002]Polypropylene is a material used in a wide variety of technical fields and reinforced polypropylenes have in particular gained relevance in fields previously exclusively relying on non-polymeric materials, in particular metals. One particular example of reinforced polypropylenes are glass fiber reinforced polypropylenes. Such materials enable a tailoring of the properties of the composition by selecting the type of polypropylene, the amount of glass fiber and the type of coupling agent used. In the recent past mainly propylene homopolymers have been used in the form of glass fiber reinforced compositions and with such compositions values for E-modulus of about 6000 MPa have been achieved, in combination with heat distortion properties being better than those achievable with isotropic particle filled polypropylenes. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K7/14
CPCC08K7/14C08L23/0815C08L23/10C08L23/16C08L51/06C08L2205/035C08L2205/02C08L2666/02
Inventor STOCKREITER, WOLFGANGSCHININGER, RENATEKASTL, JOCHEN
Owner BOREALIS TECH OY
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