Aqueous polyimide process
AssigneesCommonwealth Scientific and Industrial Research Organisation, The Boeing Company
InventorsBronwyn Glenice Laycock, David Geoffrey Hawthorne, Jonathan Howard Hodgkin, Trevor Charles Morton
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Abstract
A process for the preparation of an oligomeric polyimide comprises: mixing a tetracarboxylic acid, a dianhydride, a partially hydrolysed dianhydride or a mixture thereof with a diamine in a reaction medium comprising greater than 80% by weight water, and heating mixture in said reaction medium at a temperature above 100° C. for a time sufficient to form said oligomeric polyimide.
Claims40
A process for the preparation of an oligomeric polyimide comprising:
- mixing a tetracarboxylic acid, a dianhydride, a partially hydrolysed dianhydride or a mixture thereof with a diamine in a reaction medium comprising greater than 80% by weight water, and
- heating mixture in said reaction medium at a temperature above 100° C. for a time sufficient to form said oligomeric polyimide.
A process according to claim 27 wherein A and B are independently selected from
Dependencies are inferred from the claim text.