US 11,292,899 B2 · Propylene-based polymer, method for producing the same, propylene-based resin composition and molded article

Abstract

An object of the present invention is to provide a highly heat resistant and highly rigid propylene-based polymer having unprecedentedly high stereoregularity. The propylene-based polymer of the present invention satisfies requirements (1) to (4) and preferably requirement (5): (1) an average meso chain length is 800 to 100,000; (2) a MFR is 0.5 to 1,000 g/10 minutes; (3) a ratio of Mw to Mn, Mw/Mn, as measured by GPC is 4.2 to 20; (4) when the ratio of a component which elutes at a temperature of 122° C. or more as measured by temperature rising elution fractionation (TREF) is A % by weight and the melt flow rate of the requirement (2) is B g/10 minutes, 100≥A≥20×EXP(−0.01×B); (5) an amount of a component soluble in n-decane at 23° C. is 0.01 to 2% by weight.

Claims9

Dependent claims

A propylene-based polymer (A) which satisfies the following requirements (1) to (4):

(1) an average meso chain length is 800 to 100,000 for the propylene-based polymer (A);
(2) a melt flow rate (MFR) (ASTM D1238, 230° C., under a load of 2.16 kg) is 0.5 to 1,000 g/10 minutes;
(3) a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn), Mw/Mn, as measured by gel permeation chromatography (GPC) is 4.2 to 20;
and
(4) when a ratio of a component which elutes at a temperature of 122° C. or more as measured by temperature rising elution fractionation (TREF) of all components is A % by weight and the melt flow rate of the requirement (2) is B g/10 minutes, A and B satisfy the following formula (I):
100≥A≥20×EXP(−0.01×B) (I).

3 more elements

Dependencies are inferred from the claim text.

Propylene-based polymer, method for producing the same, propylene-based resin composition and molded article

Life of this patent

Propylene-based polymer, method for producing the same, propylene-based resin composition and molded article

Life of this patent

Abstract

Claims9