US 2022/0025150 A1 · UPGRADED RECYLED POLYPROPYLENE RICH POLYOLEFIN MATERIAL

Abstract

A polypropylene-polyethylene composition obtainable by blending a) 80 to 97 wt.-% of a blend (A) comprising A-1) polypropylene and A-2) polyethylene, wherein the weight ratio of polypropylene to polyethylene is from 9:1 to 13:7, and wherein blend (A) is a recycled material, which is recovered from waste plastic derived from post-consumer and/or post-industrial waste; and b) 3 to 20 wt.-% of a compatibilizer (B) being a heterophasic random copolymer comprising a random polypropylene copolymer matrix phase and an elastomer phase dispersed therein, whereby the heterophasic random copolymer has—a xylene insoluble content XCI of 65 to 88 wt.-% (ISO 16152, led, 25° C.), —a xylene soluble content XCS of 12 to 35 wt.-% (ISO 16152, led, 25° C.), the XCS fraction having an intrinsic viscosity (measured in decalin according to DIN ISO 1628/1 at 135° C.) of 1.2 dl/g to less than 3.0 dl/g, and—a flexural modulus of from 300 to 600 MPa (ISO 178, measured on injection moulded specimens, 23° C.); and wherein, the ratio of MFR2 (blend (A))/MFR2 (compatibilizer(B)) (ISO1133, 2.16 kg load), is in the range of from 1.5 to 3.5 g/10 min.

Claims14

Dependent claims

A polypropylene-polyethylene composition obtainable by blending:
a) 80 to 97 wt. % of a blend (A), comprising
A-1) polypropylene and
A-2) polyethylene,
wherein the weight ratio of polypropylene to polyethylene is from 9:1 to 13:7, and
wherein blend (A) is a recycled material, which is recovered from a waste plastic material derived from post-consumer and/or post-industrial waste;
and
b) 3 to 20 wt. % of a compatibilizer (B) being a heterophasic random copolymer comprising a random polypropylene copolymer matrix phase and an elastomer phase dispersed therein, whereby
the heterophasic random copolymer has:
a xylene insolubles content (XCI) of from 65 to 88 wt. % (ISO 16152, 1 ed, 25° C.), and
a xylene soluble content XCS of 12 to 35 wt. % (ISO 16152, 1 ed, 25° C.), the XCS fraction having an intrinsic viscosity (measured in decalin according to DIN ISO 1628/1 at 135° C.) of 1.2 dl/g to less than 3.0 dl/g, and
a flexural modulus of from 300 to 600 MPa (ISO 178, measured on injection moulded specimens, 23° C.);
wherein the ratio of MFR2 (blend (A))/MFR2 (compatibilizer(B)) (ISO1133, 2.16 kg load), is in the range 1.5 to 3.5 g/10 min;
and
wherein xylene insoluble content (XCI) and xylene soluble content (XCS) add up to 100 wt. %.

12 more elements

Upgraded recyled polypropylene rich polyolefin material

Life of this patent

Upgraded recyled polypropylene rich polyolefin material

Life of this patent

Abstract

Claims14