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Huntsman Patents Coating System



Published October 23, 2013
U.S. 8,263,687 B2
Huntsman International LLC has been granted a patent for a curable composition comprised of an epoxy resin containing on average more than one epoxy group per molecule; and as curing agent, a hybrid hardener; wherein the hybrid hardener is a blend of an aminic compound selected from the group consisting of aliphatic amines, cycloaliphatic amines, araliphatic amines, imidazoline group-containing amidoamines based on mono- or polybasic acids, adducts of said amines or amidoamines and glycidyl compounds, and adducts of said amines or amidoamines and cyclic carbonates, wherein said aminic compound contains, on average per molecule, at least two reactive hydrogen atoms bound to nitrogen atoms; and a polyphenol novolac, wherein the polyphenol novolac is present in an amount of from 30%-45% by weight, based on the total weight of the blend; wherein the hybrid hardener is a liquid having a viscosity lower than 20,000 mPa·s at a temperature of 20±5° C; and wherein the curable composition is a protective coating curable at a temperature of from about −5° C to approximately 50° C.


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