The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2021
Filed:
Jan. 12, 2018
Total Research & Technology Feluy, Seneffe, BE;
Alain Standaert, Brussels, BE;
Davy Francois, Rhode-Saint-Genèse, BE;
Geoffroy Terlinden, Wezembeek-Oppem, BE;
Total Research & Technology Feluy, Seneffe, BE;
Abstract
The invention relates to high purity polypropylenes and polypropylene compositions suitable for injection molding in which the polypropylene is characterized by a percentage of 2,1-insertions, relative to the total number of propylene molecules in the polymer chain, of at least 0.2%; a melting temperature Tranging from 140° C. to 160° C. as determined according to ISO 3146; a ratio of frequencies at fixed modulus of 1000 Pa for storage shear modulus (G') and loss shear modulus (G″) greater than 4.7; a molecular weight distribution (MWD) of at least 2.5; a number average molecular weight (Mn) of at most 45 kg/mol and Carreau-Yasuda parameters η, b and τ complying with the relationship:2.18−1.715()−0.015(Ln η)+0.944()+0.0149(Ln η)(Ln τ)+0.0095(Ln τ)>1when fitted to the CY equation, said CY parameters η, b and τ are determined from a dynamic rheology analysis (RDA).