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US 5,543,516 AGranted
Process for preparation of benzoxazine compounds in solventless systems
AssigneeEdison Polymer Innovation Corporation
InventorHatsuo Ishida
Life of this patent
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Abstract
A method for preparing a desired benzoxazine compound comprises preparing a substantially homogeneous reaction mixture that includes a phenolic compound; a primary amine; and an aldehyde, but no solvent other than for the solvency which the reactants may have for each other. Following its preparation, the reaction mixture is maintained at a temperature, and for a period sufficient to cause the reactants to combine chemically to form the desired compound.
Claims5
A method for preparing a benzoxazine compound comprising:
- preparing a reaction mixture containing reactants including a phenolic compound, a primary amine, and an aldehyde, said reaction mixture containing no solvents for said reactants other than for the solvency which said reactants may have for each other;
- bringing said reactants to a temperature at which the reactants combine chemically and maintaining them at that temperature to form said benzoxazine compound,
- said phenolic compound including one or more phenolic groups, said groups having the general formula:
- ##STR20## in which R.sub.2 through R.sub.4 are members selected from the group consisting of aliphatics, branched aliphatics, aromatics, halogens or amines, and in which R.sub.1 and R.sub.5 are selected from the group consisting of aliphatics, branched aliphatics, aromatics, halogens, hydrogen or amines provided that at least one of R.sub.1 and/or R.sub.5 must be hydrogen.
1 more element
Dependencies are inferred from the claim text.