Block copolymers

Patent metadata

Field	Value
Publication number	US-2016108178-A1
Application number	US-201414888563-A
Country	US
Kind code	A1
Filing date	Apr 30, 2014
Priority date	May 2, 2013
Publication date	Apr 21, 2016
Grant date	—

Abstract

Block copolymer comprising polyarylene ether blocks and polyalkylene oxide blocks, wherein said block copolymer comprises at least two polyalkylene oxide blocks that are endcapped with different endcapping groups.

First claim

1 . A block copolymer, comprising polyarylene ether blocks and polyalkylene oxide blocks, wherein the block copolymer comprises at least two polyalkylene oxide blocks that are endcapped with different endcapping groups.

2 . The block copolymer according to claim 1 , wherein the endcapping groups are alkyl groups.

3 . The block copolymer according to claim 1 , wherein the block copolymer comprises at least two polyalkylene oxide blocks that are endcapped with different alkyl groups and that are otherwise identical.

4 . A block copolymer, comprising polyarylene ether blocks and polyalkylene oxide blocks, wherein the block copolymer comprises at least two different polyalkylene oxide blocks of formula
R xA —(OCH 2 —CHR B ) k —O—  (I),
wherein x is an index number and has the identical value in each polyalkylene block comprising the same rest R A , R xA denotes an aliphatic or aromatic rest, R B denotes hydrogen or an aliphatic or aromatic rest, k is a number from 1 to 500, wherein the at least two different polyalkylene oxide blocks differ at least with respect to R xA , and wherein the polyalkylene oxide block is covalently bound to the rest of the block copolymer.

5 . The block copolymer according to claim 4 , wherein R B is H.

6 . The block copolymer according to claim 4 , wherein R 1A is C 16 alkyl and R 2A is C 18 alkyl.

7 . The block copolymer according to claim 1 , wherein the block copolymer comprises at least two sets of polyalkylene blocks that are each present in an amount of at least 5 mol % relative to a molar amount of all polyalkylene oxide blocks present in the block copolymer, wherein a set of polyalkylene blocks comprises all polyalkyleneoxide blocks present in a block copolymer that are endcapped with the same endcapping group.

8 . The block copolymer according to claim 1 , wherein the polyarylene ether blocks are of formula II

wherein
t, q: each independently 0, 1, 2 or 3,
Q, T, Y: each independently a chemical bond or group selected from —O—, —S—, —SO 2 —, S═O, C═O, —N═N—, —CR a R b — where R a and R b are each independently a hydrogen atom or a C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy or C 6 -C 18 -aryl group, where at least one of Q, T and Y is not —O—, and at least one of Q, T and Y is —SO 2 —, and
Ar, Ar 1 : each independently an arylene group having from 6 to 18 carbon atoms,
D: a chemical bond or —O—.

9 . The block copolymer according to claim 1 , wherein the polyarylene ether is a polysulfone, polyethersulfone or polyphenylenesulfone.

10 . The block copolymer according to claim 1 , wherein the block copolymer comprises individual polymer molecules of structure AB or ABA, with A being a polyalkylene oxide block and B being an polyarylene ether block.

11 . The block copolymer according to claim 1 , comprising at least two different sets of individual polymer molecules of formula III

wherein
x is an index number and has the identical value in each polyalkylene block comprising the same rest R A ,
R xA denotes an aliphatic or aromatic rest,
k is a number from 1 to 500,
n is a number from 4 to 150,
and wherein the at least two different sets of individual polymer molecules differ at least with respect to R xA .

12 . A process for making block copolymers according to claim 1 , comprising reacting aromatic bishalogeno compounds with aromatic biphenols or salts thereof in the presence of at least one suitable base and in the presence of at least two sets of polyalkyleneoxides.

13 . The block copolymers according to claim 1 , wherein the block copolymers are suitable in membranes.

14 . The block copolymers according to claim 1 , wherein the block copolymers are suitable in membranes adapted for ultrafiltration, microfiltration, reverse osmosis, forward osmosis, or nanofiltration.

15 . The block copolymers according to claim 1 , wherein the block copolymers are suitable in membranes for water treatment applications, treatment of industrial or municipal waste water, desalination of sea or brackish water, dialysis, plasmolysis, or food processing.

16 . A membrane comprising block copolymers according to claim 1 .

17 . The membrane according to claim 16 , wherein the membranes comprise the block copolymers in an amount of 0.01% by weight to 100% by weight.

18 . The membrane according to claim 16 , wherein the membrane is a UF, MF, RO, FO or NF membrane.

19 . A membrane element comprising membranes according to claim 16 .

20 . A membrane module comprising membranes according to claim 16 .

21 . A filtration system comprising membrane modules according to claim 20 .

Assignees

• Basf Se

Inventors

• Weber Martin
• Weiss Thomas
• Maletzko Christian
• Staal Bastiaan Bram Pieter
• Muehlbach Klaus
• Erbes Joerg

Classifications

• C08L71/02

  Polyalkylene oxides · CPC title

• C08G65/3346

  having sulfur bound to carbon and oxygen · CPC title

• C08L71/00

  Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers · CPC title

• C08G65/3344

  containing oxygen in addition to sulfur · CPC title

• B01D71/68

  Polysulfones; Polyethersulfones · CPC title