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US 6,048,958 AGranted
Process for the production of diketo dinitriles and polymers derived therefrom
AssigneeHenkel Corporation
InventorLouis Rebrovic
Life of this patent
Estimating the term…
Abstract
Diketo dinitriles are produced from the reaction of a diester and a nitrile in the presence of an alkali metal base. Polymers derived from the diketo dinitriles are useful as molding resins.
Claims18
A process for the production of a diketo dinitrile of the general formul a
- N.tbd.C--CHR.sup.1 --C(O)--(CH.sub.2).sub.n --C(O)--CHR.sup.1 --C.tbd.N
- wherein R.sup.1 is hydrogen, phenyl or alkyl of from 1 to about 6 carbon atoms and n is an integer of from about 6 to about 18 which comprises reacting a diester of the general formula
- R.sup.2 --O--C(O)--(CH.sub.2).sub.n --C(O)--O--R.sup.2
- wherein R.sup.2 is alkyl of from 1 to about 6 carbon atoms and n possesses the aforestated meaning, with a nitrile of the general formula
- R.sup.1 --CH.sub.2 --C.tbd.N
- wherein R.sup.1 possesses the aforestated meaning in the presence of an alkali metal base to provide a dialkali metal salt of a diketo dinitrile of the formula ##STR2## wherein Met is an alkali metal and thereafter acidifying the salt to provide the product diketo dinitrile.
3 more elements
A polymer containing units derived from a diketo dinitrile of the general formula
- N.tbd.C--CHR.sup.1 --C(O)--(CH.sub.2).sub.n --C(O)--CHR.sup.1 --C.tbd.N
- wherein R.sup.1 is hydrogen, phenyl or alkyl of from 1 to about 6 carbon atoms and n is an integer of from about 6 to about 18.
Dependencies are inferred from the claim text.