Block copolymers

Patent metadata

Field	Value
Publication number	US-10144807-B2
Application number	US-201414888563-A
Country	US
Kind code	B2
Filing date	Apr 30, 2014
Priority date	May 2, 2013
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

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

The invention claimed is:

1. A block copolymer composition, comprising:
at least two different sets of individual polymers of structure AB and/or ABA, wherein B is a polyethersulfone block of formula IIk:

wherein D is a direct bond; and
A represents at least two different polyalkylene oxide blocks designated A′ and A″ directly covalently bonded to a common polyarylene ether block structure with an ether bond;
wherein
a set of polymers have the same polyalkylene ether blocks A′ or A″, and
the at least two different polyalkylene oxide blocks are each of formula
R x —(OCH 2 —CHR B ) k —O—  (1),

wherein
R x is an aliphatic or aromatic group having from 1 to 20 carbons,
x is an index number which identifies different R groups, with the proviso that at least two different R groups having different x numbers are present,
R B is hydrogen, an aliphatic group or an aromatic group,
k is a number from 1 to 500.

2. The block copolymer composition according to claim 1 , wherein each R x group is an alkyl group.

3. The block copolymer composition according to claim 1 , wherein the different sets of block copolymer comprise identical polyalkylene oxide blocks of formula
—(OCH 2 —CHR B ) k —O—

and different R x groups.

4. The block copolymer composition according to claim 1 , wherein R B is H.

5. The block copolymer composition according to claim 1 , wherein x is 1 and 2 and R 1 is a C 16 alkyl and R 2 is a C 18 alkyl.

6. The block copolymer composition according to claim 1 , wherein a molar content of each different polyalkylene block of formula I is at least 5 mol % relative to a total molar amount of all polyalkylene oxide blocks of formula I present in the block copolymer composition.

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

wherein
R x is an aliphatic or aromatic group,
x is an index number which identifies different R groups, with the proviso that at least two different x numbers are present,
k is a number from 1 to 500,
n is a number from 4 to 150.

8. A process for making the block copolymer composition according to claim 1 , comprising reacting aromatic bishalogeno sulfonyl compounds with aromatic biphenols or salts thereof in the presence of at least one base and in the presence of at least two different polyalkyleneoxide compounds comprising different groups of formula (I).

9. A membrane comprising the block copolymer composition according to claim 1 .

10. The membrane according to claim 9 , wherein the membrane is suitable for ultrafiltration, microfiltration, reverse osmosis, forward osmosis, or nanofiltration.

11. The membrane according to claim 9 , wherein the membrane is suitable for water treatment applications, treatment of industrial or municipal waste water, desalination of sea or brackish water, dialysis, plasmolysis, or food processing.

12. The membrane according to claim 9 , wherein an amount of the block copolymer composition is from 0.01% by weight to 100% by weight of the membrane.

13. The membrane according to claim 12 , wherein the membrane is an ultrafiltration (UF) membrane, a microfiltration (MF) membrane, a reverse osmosis (RO) membrane, a forward osmosis (FO) membrane or a nanofiltration (NF) membrane.

14. A membrane element comprising multiple membranes according to claim 9 .

15. A membrane module comprising multiple membranes according to claim 9 .

16. A filtration system comprising multiple membrane modules according to claim 15 .

Assignees

• Basf Se

Inventors

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

Classifications

• 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

• C08G65/3346

  having sulfur bound to carbon and oxygen · CPC title

• C08G65/334 Primary

  containing sulfur · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title

• C08G65/3344

  containing oxygen in addition to sulfur · CPC title