Heterophasic propylene polymerization material and olefin polymer

Patent metadata

Field	Value
Publication number	US-12428549-B2
Application number	US-202218064307-A
Country	US
Kind code	B2
Filing date	Dec 12, 2022
Priority date	Jan 14, 2022
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

Provided are a heterophasic propylene polymerization material and an olefin polymer having a small high-boiling-point component amount index (FOG). The heterophasic propylene polymerization material satisfies the following formula (3): (X2×Y2)/Z2≤7.0 (3) wherein X2 represents a cold xylene soluble component amount (mass %) of the heterophasic propylene polymerization material; Y2 represents a percentage (%) of a component having a molecular weight of 104.0 or less in terms of polystyrene and contained in a cold xylene soluble component of the heterophasic propylene polymerization material based on all components of the cold xylene soluble component of the heterophasic propylene polymerization material as measured by gel permeation chromatography; and Z2 represents a content (mass %) of a propylene-based copolymer contained in the heterophasic propylene polymerization material and containing a propylene-derived monomer unit and a monomer unit derived from at least one compound selected from the group consisting of ethylene and C4-12 α-olefins.

First claim

What is claimed is:

1. A heterophasic propylene polymerization material that satisfies the following formula (3):
(X2×Y2)/Z2≤7.0  (3)

wherein
X2 represents a cold xylene soluble component amount (mass %) of the heterophasic propylene polymerization material;
Y2 represents a percentage (%) of a component having a molecular weight of 104.0 or less in terms of polystyrene and contained in a cold xylene soluble component of the heterophasic propylene polymerization material based on all components of the cold xylene soluble component of the heterophasic propylene polymerization material as measured by gel permeation chromatography; and
Z2 represents a content (mass %) of a propylene-based copolymer contained in the heterophasic propylene polymerization material and containing a propylene-derived monomer unit and a monomer unit derived from at least one compound selected from the group consisting of ethylene and C 4-12 α-olefins.

2. The heterophasic propylene polymerization material according to claim 1 , which satisfies the following formula (4):
0.3<(X2×Y2)/Z2<7.0  (4)

wherein X2, Y2, and Z2 have the same meanings as described above.

3. The heterophasic propylene polymerization material according to claim 1 , comprising:
(a) a propylene-based polymer containing 80 mass % or more of propylene-derived monomer unit and having an intrinsic viscosity of 2.0 dL/g or less; and
(b) a propylene-based copolymer containing a propylene-derived monomer unit and 30 to 55 mass % of a monomer unit derived from at least one compound selected from the group consisting of ethylene and C 4-12 α-olefins and having an intrinsic viscosity of from 1.5 to 8.0 dL/g.

4. The heterophasic propylene polymerization material according to claim 3 , wherein the propylene-based polymer (a) has a content of from 50 to 90 mass %, and the propylene-based copolymer (b) has a content of from 10 to 50 mass %.

5. The heterophasic propylene polymerization material according to claim 3 , wherein the propylene-based polymer (a) has an isotactic pentad fraction of more than 0.975.

6. An olefin polymer that satisfies the following formula (1):
Y1/X1≤40  (1)

wherein
X1 represents a cold xylene soluble component amount (mass %) of the olefin polymer; and
Y1 represents a percentage (%) of a component having a molecular weight of 103.5 or less in terms of polystyrene and contained in a cold xylene soluble component of the olefin polymer based on all components of the cold xylene soluble component of the olefin polymer as measured by gel permeation chromatography.

7. The olefin polymer according to claim 6 , which satisfies the following formula (2):
5.3<Y1/X1<40  (2)

wherein X1 and Y1 have the same meanings as described above.

8. The olefin polymer according to claim 6 , which is a propylene polymer.

9. The olefin polymer according to claim 8 , which is a propylene homopolymer.

Assignees

• Sumitomo Chemical Co

Inventors

• Ito Masaki

Classifications

• C08L23/0815

  with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title

• C08F255/02

  on to polymers of olefins having two or three carbon atoms · CPC title

• C08L2308/00

  Chemical blending or stepwise polymerisation process with the same catalyst · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title