Low viscosity diprimary amine reactive modifiers for epoxy resins
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United States of America Patent
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Apr 5, 1994
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N/A
app pub date -
Sep 17, 1992
filing date -
Jan 31, 1989
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Abstract
A low viscosity, diprimary amine-terminated reactive liquid polymer with low residual amine content, comprising the reaction product of a diprimary amine having the following formula H.sub.2 N--R--NH.sub.2 wherein --NH.sub.2 is a primary terminal amine group; and wherein R is (1) a C.sub.4 -C.sub.12 aliphatic chain having alkyl branches containing 2 to 4 carbons, wherein the positions of said alkyl branches within the C.sub.4 -C.sub.12 aliphatic chain are such that they impart relatively different rates of reactivity to the terminal primary amine groups; or (2) a carbon to carbon backbone containing at least one non-reactive heteroatom, comprising (a) a C.sub.2 -C.sub.20 aliphatic or cycloaliphatic moiety containing at least one tertiary amine; or (b) a polyoxyalkylene wherein the alkyl portion of said polyoxyalkylene contains 2 to 4 carbon atoms; and a functional-terminated reactive liquid polymer useful as an epoxy resin modifier employed with a curing agent.
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