Invention Grant
- Patent Title: Method of sulfonation of block polymers
- Patent Title (中): 嵌段聚合物的磺化方法
-
Application No.: US14486604Application Date: 2014-09-15
-
Publication No.: US09587106B2Publication Date: 2017-03-07
- Inventor: Gregory Paul Dado , Dale Lee Handlin, Jr. , Carl Lesley Willis
- Applicant: Stepan Company
- Applicant Address: US IL Northfield
- Assignee: Stepan Company
- Current Assignee: Stepan Company
- Current Assignee Address: US IL Northfield
- Agency: McAndews, Held & Malloy, Ltd.
- Main IPC: C08F8/36
- IPC: C08F8/36 ; C08L53/02 ; C08G81/02

Abstract:
Improved methods for preparing sulfonated block polymers with acyl sulfates in non-halogenated aliphatic solvents are provided. The methods include the sulfonation of a precursor block polymer with an acyl sulfate in a reaction mixture further comprising at least one non-halogenated aliphatic solvent to form a sulfonated block polymer, wherein the initial concentration of the precursor block polymer is in the range of from about 0.1 wt % to a concentration that is below the limiting concentration of the precursor block polymer based on the total weight of the reaction mixture. A sulfonation degree of greater than about 1.0 milliequivalent sulfonic acid per gram sulfonated block polymer can be achieved substantially free of polymer precipitation and free of disabling gelation.
Public/Granted literature
- US20150005439A1 Method of Sulfonation of Block Polymers Public/Granted day:2015-01-01
Information query
IPC分类: