Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
Inventor
active
Method for making polyetherimide using a phenolic or carboxylic
Method for making polyetherimides
Organic amine catalyzed method for making polyetherimide
Quaternary Group VA salt catalyzed method for making polyetherim
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