Sulfonated poly(phenylene ether) and method for the manufacture thereof
AssigneeShpp Global Technologies B.V.
InventorsNeha Lamba, Girish Chandra, Anshita Sudarshan, Rajesh Chowdhury, Omkar Gadgil, Gopee Kottakota, Surya Prakasa Rao Daliparthi, Debasish Banerjee
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Abstract
A sulfonated poly(phenylene ether) is described herein. The sulfonated poly(phenylene ether) has a degree of sulfonation of 15 to 50%. At least 90% of the sulfonated poly(phenylene ether) repeating units of the sulfonated poly(phenylene ether) are monosubstituted. Methods for the manufacture of the sulfonated poly(phenylene ether) and articles prepared therefrom are also disclosed.
Claims15
A sulfonated poly(phenylene ether) comprising:
- repeating units of the formula
- wherein in the foregoing formula,
- Z1 is independently at each occurrence a sulfonic acid group, a sulfonyl chloride group, halogen, unsubstituted or substituted C1-12 hydrocarbyl provided that the hydrocarbyl group is not tertiary hydrocarbyl, C1-12 hydrocarbylthio, C1-12 hydrocarbyloxy, or C2-12 halohydrocarbyloxy wherein at least two carbon atoms separate the halogen and oxygen atoms;
- Z2 is independently at each occurrence a sulfonic acid group, a sulfonyl chloride group, hydrogen, halogen, unsubstituted or substituted C1-12 hydrocarbyl provided that the hydrocarbyl group is not tertiary hydrocarbyl, C1-12 hydrocarbylthio, C1-12 hydrocarbyloxy, or C2-12 halohydrocarbyloxy wherein at least two carbon atoms separate the halogen and oxygen atoms;
- and
- wherein the sulfonated poly(phenylene ether) has a degree of sulfonation of 15 to 50% as determined by nuclear magnetic resonance spectroscopy;
- and
- wherein at least 90% of the sulfonated poly(phenylene ether) repeating units of the sulfonated poly(phenylene ether) are monosubstituted.
A method of making a sulfonated poly(phenylene ether), the method comprising:
- contacting a poly(phenylene ether) with a sulfonating agent in the presence of a solvent comprising 1,2-dichloroethane and a cosolvent comprising ethyl acetate under conditions effective to provide a mixture comprising the sulfonated poly(phenylene ether);
- and
- isolating the sulfonated poly(phenylene ether) from the mixture;
- wherein
- the poly(phenylene ether) is present in an amount of greater than or equal to 8 weight percent, based on the total weight of the poly(phenylene ether), the sulfonating agent, the solvent, and the cosolvent;
- the cosolvent is present in an amount of 7 to 15 weight percent based on the total weight of the solvent and the cosolvent;
- and
- wherein the sulfonating agent is present in a weight ratio of sulfonating agent to poly(phenylene ether) of less than 0.5:1.
Dependencies are inferred from the claim text.