Water soluble amine resins which are Mannich bases
AssigneeDeSoto, Inc.
InventorsKazys Sekmakas, Raj Shah
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Abstract
An amine resin soluble in water with the aid of an acid is produced by reacting a dihydric phenolic compound, such as a bisphenol, with a stoichiometric deficiency of preferably aromatic diepoxide, and then reacting the product containing less than -0.3 part of unreacted dihydric phenolic compound per part of reaction product with at least about 3.25 mol of formaldehyde per mol of said reaction product and with monosecondary amine to produce a Mannich base. This Mannich base is then reacted with additional diepoxide in an amount of from 0.5 to 2 epoxy equivalents per epoxy equivalent in the initially used diepoxide.
Claims10
An amine resin which is soluble in water with the aid of an acid, produced by reacting a dihydric phenolic compound with diepoxide having a 1,2-epoxy equivalency of at least about 1.4 and providing from 0.3 to 0.6 equivalents of epoxide in said diepoxide per equivalent of phenolic OH in said phenolic compound, and then reacting the reaction product containing less than 0.3 part of unreacted dihydric phenolic compound per part of said reaction product with at least about 3.25 mols of formaldehyde per mol of reaction product and with monosecondary amine to produce Mannich base groups, and then reacting with additional diepoxide in an amount of from 0.5 to 2 epoxy equivalents per epoxy equivalent in the initially used diepoxide.
An amine resin which is soluble in water with the aid of an acid produced by reacting a bisphenol with a diglycidyl ether of a bisphenol having a molecular weight in the range of 350 to 600 in an amount of 0.3 to 0.6 equivalents of epoxide per equivalent of phenolic OH in said bisphenol, then reacting the product containing less than 0.3 part of unreacted bisphenol per part of said reaction product with more than 3.5 moles of formaldehyde per mol of starting bisphenol to solubilize the formaldehyde, and then reacting with a mixture of C.sub.1 -C.sub.8 dialkyl amine and diethanol amine to produce a Mannich base, and then reacting with additional diepoxide in an amount of from 1 to 1.5 epoxy equivalents per epoxy equivalent in the initially used diglycidyl ether.
Dependencies are inferred from the claim text.