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US 10,011,708 B2Granted
Superior stress whitening performance for battery cases
AssigneesAbu Dhabi Polymers Co. Ltd (Borouge) LLC., Borealis AG
InventorsJanne Lampela, Thomas Rothmayer, Chris Chen
Life of this patent
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Abstract
Injection molded article with reduced stress whitening, said article comprises a composition of a heterophasic propylene copolymer, inorganic filler and optionally low amounts of a high density polyethylene, wherein said heterophasic propylene copolymer has a propylene copolymer as a matrix.
Claims13
An injection molded article (IMA) comprising at least 90 wt.-%, based on the total weight of the injection molded article (IMA), of a polypropylene composition (PC), wherein said polypropylene composition (PC) comprises
- (a) at least 88.25 wt.-%, based on the total weight of the polypropylene composition (PC), of a heterophasic propylene copolymer (RAHECO);
- (b) 0.005 to 0.350 wt.-%, based on the total weight of the polypropylene composition (PC), of an organic metal deactivator (MD);
- (c) 0.005 to 0.400 wt.-%, based on the total weight of the polypropylene composition (PC), of a sulphur containing antioxidant (SAO);
- (d) 0 to 3.0 wt.-%, based on the total weight of the polypropylene composition (PC), of an inorganic filler (F);
- and
- (e) 0 to 8.0 wt.-%, based on the total weight of the polypropylene composition (PC), of a high density polyethylene (HDPE);
- wherein further
- the heterophasic propylene copolymer (RAHECO)
- (i) has a comonomer content in the range of 5.0 to 15.0 mol.-%,
- (ii) has a xylene cold soluble (XCS) fraction in the range of 9.0 to 18 wt.-%,
- (iii) comprises a propylene copolymer (M) having a comonomer content in the range of 0.4 to 2.0 mol.-%, and
- (iv) comprises an elastomeric propylene copolymer (R).
9 more elements
Dependencies are inferred from the claim text.