Back to results
US 12,668,673 B2Granted
Glass fiber composite
AssigneeBorealis AG
InventorsJingbo Wang, Markus Gahleitner, Klaus Bernreitner, Pauli Leskinen, Georg Grestenberger
Life of this patent
Estimating the term…
Abstract
Fiber reinforced composite comprising a polypropylene with high melting temperature and narrow molecular weight distribution.
Claims20
A fiber reinforced composite comprising:
- (a) 59 to 90 wt.-% of a polypropylene, based on the fiber reinforced composite,
- (b) 9.0 to 40 wt.-% of glass fibers, based on the fiber reinforced composite, the glass fibers used in the fiber reinforced composite being short glass fibers having an average fiber length of 2.0 to 10.0 mm, and
- (c) 0.05 to 5.0 wt.-% of a compatibilizer, based on the fiber reinforced composite,
- wherein the total amount of the polypropylene, the short glass fibers and the compatibilizer in the fiber reinforced composite is at least 95 wt.-%,
- wherein the polypropylene has:
- (i) a melting temperature Tm determined by DSC according to ISO 11357-3 (heating and cooling rate 10° C./min) in the range of 152 to 160° C.,
- (ii) a comonomer content determined by 13C-NMR spectroscopy of not more than 0.5 wt.-%, the comonomer being ethylene,
- (iii) a molecular weight distribution (MWD) determined by gel permeation chromatography (GPC) in the range of 1.0 to below 4.0, and
- (iv) 2,1 regio-defects determined by 13C-NMR spectroscopy in the range of 0.10 to 0.90%, wherein the process for manufacture of the fiber reinforced composite comprises:
- melt blending
- (a) the polypropylene,
- (b) the glass fibers, having an average fiber length of 2.0 to 10.0 mm,
- (c) the compatibilizer, and
- (d) optional additives
- in an extruder and extruding the fiber reinforced composite.
12 more elements
A process for the manufacture of a fiber reinforced composite, the fiber reinforced composite comprising:
- (a) 59 to 90 wt.-% of a polypropylene, based on the fiber reinforced composite,
- (b) 9.0 to 40 wt.-% of glass fibers, based on the fiber reinforced composite, and
- (c) 0.05 to 5.0 wt. of a compatibilizer, based on the fiber reinforced composite,
- wherein the total amount of the polypropylene, the glass fibers and the compatibilizer in the fiber reinforced composite is at least 95 wt.-%,
- wherein the polypropylene has been produced by polymerizing propylene in the presence of a metallocene catalysts and wherein the polypropylene has:
- (i) a melting temperature Tm determined by DSC according to ISO 11357-3 (heating and cooling rate 10° C./min) in the range of 152 to 160° C.,
- (ii) a comonomer content determined by 13C-NMR spectroscopy of not more than 0.5 wt.-%, the comonomer being ethylene,
- (iii) a molecular weight distribution (MWD) determined by gel permeation chromatography (GPC) in the range of 1.0 to below 4.0, and
- (iv) 2, 1 regio-defects determined by 13C-NMR spectroscopy in the range of 0.10 to 0.90%;
- the process for the manufacture of the fiber reinforced composite comprising:
- melt blending
- (a) the polypropylene,
- (b) the short glass fibers, having an average fiber length of 2.0 to 10.0 mm,
- (c) the compatibilizer, and
- (d) optionally additives
- in an extruder, and
- extruding the same to obtain the fiber reinforced composite.
14 more elements
Dependencies are inferred from the claim text.