31-12-2015 дата публикации
Номер: US20150376341A1
Принадлежит:
Disclosed is a block copolymer of the formula: A-B-A (I) or A-B (II), wherein block A is: (i) a polymer of allyl glycidyl ether or (ii) a polymer of allyl glycidyl ether wherein one more of the allyl groups have been replaced with 1,2-dihydroxypropyl group or a group of the formula: —(CH)—S—(CH)—X, wherein a, b, and X are defined herein. The block copolymers find use as wetting agents in the preparation of porous membranes from aromatic hydrophobic polymers such as polyethersulfone. Also disclosed are methods of preparing such block copolymers and porous membranes therefrom. 1. A block copolymer of the formula: A-B-A (I) or A-B (II) ,wherein block A is:(i) a polymer of allyl glycidyl ether, said polymer having allyl groups; or{'sub': 2', 'a', '2', 'b', '2, '(ii) a polymer of allyl glycidyl ether wherein one more of the allyl groups have been replaced with 1,2-dihydroxypropyl group or a group of the formula: —(CH)—S—(CH)—X, wherein a is 3 and b is 1 to 3, and X is selected from an acidic group, a basic group, a cation, an anion, a zwitterion, halo, hydroxyl, acyl, acyloxy, alkylthio, alkoxy, aldehydo, amido, carbamoyl, ureido, cyano, nitro, epoxy, a group of the formula —C(H)(COOH)(NH), and a group of the formula —C(H)(COOH)(NHAc), or a salt thereof; and'}block B is an aromatic hydrophobic polymeric segment.3. The block copolymer of claim 1 , wherein block A is a polymer of allyl glycidyl ether wherein one more of the allyl groups have been replaced with 1 claim 1 ,2-dihydroxypropyl group or a group of the formula: —(CH)—S—(CH)—X claim 1 , wherein a and b are independently 1 to 3 claim 1 , and X is a group selected from an acidic group claim 1 , a basic group claim 1 , a cation claim 1 , an anion claim 1 , a zwitterion claim 1 , halo claim 1 , hydroxyl claim 1 , acyl claim 1 , acyloxy claim 1 , alkylthio claim 1 , alkoxy claim 1 , aldehydo claim 1 , amido claim 1 , carbamoyl claim 1 , ureido claim 1 , cyano claim 1 , nitro claim 1 , epoxy claim 1 , a group of the ...
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