发明名称 |
Method of Sulfonation of Block Polymers |
摘要 |
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.
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申请公布号 |
US2010048817(A1) |
申请公布日期 |
2010.02.25 |
申请号 |
US20090498778 |
申请日期 |
2009.07.07 |
申请人 |
DADO GREGORY PAUL;HANDLIN JR DALE LEE;WILLIS CARL LESLEY |
发明人 |
DADO GREGORY PAUL;HANDLIN, JR. DALE LEE;WILLIS CARL LESLEY |
分类号 |
C08G81/00 |
主分类号 |
C08G81/00 |
代理机构 |
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地址 |
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