Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2008-05-06
2008-05-06
Gulakowski, Randy (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S353000, C525S535000, C525S536000, C521S027000, C521S030000, C521S033000, C521S034000, C521S037000
Reexamination Certificate
active
11030576
ABSTRACT:
This invention relates to methods of making graft copolymers, and articles having such graft copolymers. The methods may provide better control than in radicalization or photoinitiated polymerization techniques. For example, a graft copolymer can be prepared by reacting an alkoxide ion with a polymer. The alkoxide, in turn, can be provided by any suitable technique, for example, by reacting an alcohol with a base. In some embodiments of the invention, the graft copolymers may be a normally hydrophobic polymer, such as a polysulfone, that has been made more hydrophilic due to the attachment of hydrophilic side groups such as polyethylene glycol or polypropylene glycol. The copolymers of the invention have many uses, for example, in films or porous membranes.
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Acar Metin H.
Akthakul Ariya
Mayes Anne M.
Park Jane Y.
Asinovsky Olga
Gulakowski Randy
Massachusetts Institute of Technology
Wolf Greenfield & Sacks P.C.
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