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US 5,344,914 AGranted
Commercially valuable polymeric ketones and method of preparing same
AssigneeCenter for Innovative Technology
InventorsHarry W. Gibson, Ashish Pandya
Life of this patent
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Abstract
A new method for preparing commercially valuable polymeric ketones is described. The method employs an .alpha.-amiononitrile as a monomeric unit whereby an amorphous, soluble polymer having protected carbonyl moiety is obtained. Upon deprotecting the carbonyl moiety, a crystalline polymeric ketone is obtained. The method allows production of polymeric ketone materials having aromatic, aliphatic or mixed aromatic/aliphatic backbones.
Claims6
A method of preparing polymers having ketone functionality, comprising the steps of:
- forming a dianion from a first monomer having at least one aminonitrile constituent, wherein the amino moiety of the aminonitrile constituent is a secondary amine;
- condensing said dianion with a difunctional electrophile to produce a polyaminonitrile;
- and
- acid catalyzing aminonitrile constituents in said polyaminonitrile to produce a polymer having ketone functionality.
1 more element
A polymeric material having ketone functionality having the formula:
- ##STR2## where Ar is selected from the group consisting of:
- ##STR3##
Dependencies are inferred from the claim text.