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Low EFO polypropylene composition

A technology of polypropylene homopolymer and composition, applied in the field of new polymer composition, capable of solving problems such as poor FOG value

Active Publication Date: 2018-03-27
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although much work has been done to reduce EFO in the field of polypropylene compositions used in the automotive interior industry, it is still quite a challenging problem to combine all these mentioned requirements
A particular disadvantage of the commonly used Ziegler-Natta based additives (e.g. HDPE or polypropylene homopolymers) is that when they are added to the polymer matrix material they significantly increase the EFO value of the polymer matrix material
Also, while the VOC value is lower when slip agent is also added, it seems that the slip agent has an antagonistic effect on the FOG value, making the FOG value worse than when only Ziegler-Natta HDPE is used

Method used

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  • Low EFO polypropylene composition
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Embodiment

[0084] Unless defined otherwise, the following definitions of terms and assay methods apply to the above general description of the invention as well as to the following examples.

[0085] 1. Measurement method

[0086] Quantification of microstructure by NMR spectroscopy

[0087] Quantitative nuclear magnetic resonance (NMR) spectroscopy was used to quantify the comonomer content of the polymers. Quantitation was recorded in solution state using a Bruker Advance III 400NMR spectrometer 13 C{ 1 H} NMR spectrum, for 1 H and 13 C, The spectrometers were operated at 400.15 MHz and 100.62 MHz, respectively. Using nitrogen for all pneumatics, all spectra were recorded at 125 °C using a 13C optimized 10 mm extended temperature probe. Mix approximately 200 mg of the material with chromium-(III) acetylacetonate (Cr(acac) 3 ) together in 3ml of 1,2-tetrachloroethane-d 2 (TCE-d 2 ), a 65 mM solution of the relaxant in the solvent was formed (as described in G. Singh, A. Kothari,...

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PUM

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Abstract

Polymer composition comprising at least one polypropylene homopolymer and / or random copolymer, up to 15 wt % of at least one polyethylene, optionally at least one elastomer in an amount of 8 to 40 wt%and optionally fillers and / or additives in an amount of up to 45 wt% based on the total weight of the final polymer composition with the at least one polyethylene having a density of higher than 940kg / m3, a content of hexane hot extractables of below 0.80 wt% preferably below 0.60 wt%, most preferably below 0.40 wt% and a copolymer / homopolymer (COHO) ratio measured by Temperature Rising ElutionFraction (TREF) up to 6%.

Description

technical field [0001] The present invention relates to a novel polymer composition comprising at least one polypropylene homopolymer and / or random copolymer and up to 15% by weight of at least one polyethylene. The invention also relates to the use of at least one polyethylene for the preparation of a polymer composition, to a process for the preparation of an article comprising the composition and to an article made therefrom. Background technique [0002] Automotive interior components, such as dashboards, door cladding, trim, etc., are often made from polymers; especially acrylic-based resins are widely used in these applications. Usually an attempt is made to maintain a high quality feel until the end of the car's life, so the polymer should provide high scratch resistance against eg keys, fingernails, rings, etc. Compared to metals, polymers have considerably lower stiffness and lower surface hardness, making them easier to scratch. In order to achieve good scratch r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12
CPCC08L2207/062C08L2308/00C08L23/12C08L23/06C08L23/0815C08L23/14C08L2203/00C08L2207/02
Inventor 王静波克劳迪娅·克尼泽尔佩塔尔·多舍弗弗朗瑞恩·普拉德
Owner BOREALIS AG