	US 11,905,400 B2
	Pipes and polypropylene composition for the manufacture thereof
Monica Galvan, Ferrara (IT); Claudio Cavalieri, Ferrara (IT); Thomas Boehm, Darmstadt (DE); and Roberto Pantaleoni, Ferrara (IT)
Assigned to Basell Poliolefine Italia S.r.l., Milan (IT)
Appl. No. 17/282,294
Filed by BASELL POLIOLEFINE ITALIA S.R.L., Milan (IT)
PCT Filed Sep. 11, 2019, PCT No. PCT/EP2019/074172 § 371(c)(1), (2) Date Apr. 1, 2021, PCT Pub. No. WO2020/069828, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 18198385 (EP), filed on Oct. 3, 2018.
Prior Publication US 2021/0340367 A1, Nov. 4, 2021
Int. Cl. C08L 23/14 (2006.01); F16L 9/12 (2006.01)

CPC C08L 23/14 (2013.01) [F16L 9/12 (2013.01); C08L 2203/18 (2013.01); C08L 2205/025 (2013.01)]

9 Claims

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.