Pipes and polypropylene composition for the manufacture thereof

Patent metadata

Field	Value
Publication number	US-11905400-B2
Application number	US-201917282294-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Oct 3, 2018
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A polypropylene composition made from or containing:
A) from 88.0 wt. % to 98.0 wt. %, of a random copolymer of propylene containing from 0.8 wt. % to 4.8 wt. % of 1-hexene derived units; the random copolymer of propylene having:
a Melt Flow Rate: measured according to ISO 1133 (230° C., 5 Kg) ranging from 0.5 to 4.4 g/10 min; and
B) from 2.0 wt. % to 12.0 wt. % of a terpolymer of propylene ethylene and 1-hexene having a content of ethylene derived units ranging from 35 wt. % to 60 wt.; and a content of 1-hexene derived units ranging from 1 wt. % to 6 wt. %; wherein the polypropylene composition has a Melt Flow Rate: measured according to ISO 1133 (230° C., 5 Kg) ranging from 0.5 to 5.0 g/10 min.

First claim

What is claimed is:

1. A polypropylene composition comprising:
A) from 88.0 wt. % to 98.0 wt. %, of a random copolymer of propylene containing from 0.8 wt. % to 4.8 wt. % of 1-hexene derived units, based upon the total weight of the random copolymer of propylene, wherein the random copolymer of propylene has a melt flow rate, measured according to ISO 1133 (230° C., 5 kg) ranging from 0.5 to 4.4 g/10 min.; and
B) from 2.0 wt. % to 12.0 wt. % of a terpolymer, wherein the terpolymer consists of propylene, ethylene and 1-hexene, and wherein the terpolymer has a content of ethylene derived units ranging from 35 wt. % to 60 wt. %, based upon the total weight of the terpolymer, and a content of 1-hexene derived units ranging from 1 wt. % to 6 wt. %, based upon the total weight of the terpolymer,
wherein the polypropylene composition has a melt flow rate, measured according to ISO 1133 (230° C., 5 kg) ranging from 0.5 to 5.0 g/10 min, and
wherein the sum of the amounts of A) and B) is 100.

2. The polypropylene composition according to claim 1 , wherein, in component A), the content of 1-hexene derived units ranges from 1.4 wt. % to 4.1 wt. %.

3. The polypropylene composition according to claim 1 , wherein, in component A), the content of 1-hexene derived units ranges from 1.8 wt. % to 3.6 wt. %.

4. The polypropylene composition according to claim 1 , wherein, in component B, the content of ethylene derived units ranges from 42 wt. % to 54 wt. %.

5. The polypropylene composition according to claim 1 , wherein the amount of component A) ranges from 90.5 wt. % to 96.5 wt. % and the amount of component B ranges from 3.5 wt. % to 9.5 wt. %.

6. The polypropylene composition according to claim 1 , having a tensile modulus higher than 900 MPa measured according to ISO 527-2 2012, and ISO 1873-2 2007.

7. The polypropylene composition according to claim 1 , having a Charpy impact value measured according to ISO 179-1eA 2010, and ISO 1873-2 2007, measured at 23° C. after 7 days of annealing, higher than 80 KJ/m 2 .

8. A pipe comprising the polypropylene composition of claim 1 .

9. A pressure pipe comprising the polypropylene composition of claim 1 .

Assignees

• Basell Poliolefine Italia Srl

Inventors

• Galvan Monica
• Cavalieri Claudio
• Boehm Thomas
• Pantaleoni Roberto

Classifications

• C08L23/14 Primary

  Copolymers of propene (C08L23/16 takes precedence) · CPC title

• F16L9/12

  of plastics with or without reinforcement (F16L9/16 - F16L9/22 take precedence) · CPC title

• C08L2203/18

  used for pipes · 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

• C08F210/06

  Propene · CPC title