US 11,993,714 B2 · Block copolymer exhibiting improved abrasion resistance and improved tear resistance

Abstract

The invention relates to a copolymer containing rigid polyamide PA blocks and flexible blocks, characterized in that it includes at least one carboxylic acid chain end blocked with a polycarbodiimide, said copolymer according to the invention being in noncrosslinked linear form. The invention also relates to the use of a polycarbodiimide in a process for manufacturing a copolymer containing rigid polyamide PA blocks and flexible blocks, including at least one carboxylic acid chain end, for improving the extrudability of the copolymer, the drawability of the copolymer, the abrasion resistance, the tear strength and the durability of the copolymer, without increasing its dispersity.

Claims10

Dependent claims

A block copolymer comprising at least one rigid polyamide PA block and at least one flexible block,

wherein the flexible block comprises at least one block resulting from polyetherdiols,
wherein said block copolymer includes at least one carboxylic acid chain end blocked with a polycarbodiimide, and
wherein said copolymer is in noncrosslinked linear form, its dispersity Mw/Mn being less than 3,
wherein the weight content of the polycarbodiimide represents from 0.5% to 10% by weight, relative to the total weight of the copolymer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

16/763,567Filed 16 Nov 2018

Priority

FR 17.6088017 Nov 2017

Published

US 2020/0385574 A110 Dec 2020

Granted

28 May 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

C08L 77/12
Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain ; Compositions of derivatives of such polymers:…
C08F 293/00
Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable
C08G 69/48
Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule: polymers modified by…
C08L 77/02
Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain ; Compositions of derivatives of such polymers:…

Block copolymer exhibiting improved abrasion resistance and improved tear resistance

Life of this patent

Block copolymer exhibiting improved abrasion resistance and improved tear resistance

Life of this patent

Abstract

Claims10