Total Research & Technology Feluy

Geoffroy Terlinden

Alain Standaert

Davy Francois

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&#xb0; C. to 160&#xb0; 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&#x2033;) 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 &#x3b7;, b and &#x3c4; complying with the relationship:2.18&#x2212;1.715()&#x2212;0.015(Ln &#x3b7;)+0.944()+0.0149(Ln &#x3b7;)(Ln &#x3c4;)+0.0095(Ln &#x3c4;)&#x3e;1when fitted to the CY equation, said CY parameters &#x3b7;, b and &#x3c4; are determined from a dynamic rheology analysis (RDA).

Growing community of inventors

Wezembeek-Oppem, Belgium

Geoffroy Terlinden