Curing agent for low temperature cure applications
AssigneeAir Products and Chemicals, Inc.
InventorsFrederick Herbert Walker, Michael Ian Cook, Gamini Ananda Vedage, Robert Marjo Theodoor Rasing
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Abstract
The present invention provides Mannich base derivatives of N,N′-dimethyl secondary diamine polymers including Mannich base derivatives of methylamine-terminated poly-(N-methylazetidine) and Mannich base derivatives of methylamine-terminated poly-(N-methylazacycloheptane). Amine curing agent compositions and amine-epoxy compositions containing Mannich base derivatives of N,N′-dimethyl secondary diamine polymers are also disclosed.
Claims18
A composition comprising a Mannich base reaction product of:
- at least one aldehyde compound comprising formaldehyde;
- at least one phenol compound comprising phenol, cresol, t-butyl phenol, nonyl phenol, cardanol, or a combination thereof;
- and
- at least one N,N′-dimethyl secondary diamine polymer comprising methylamine-terminated poly-(N-methyl-azetidine), methylamine-terminated poly-(N-methyl-azacycloheptane), or a combination thereof.
A composition comprising a Mannich base reaction product comprising compounds having the formula:
- wherein:
- m is 1, 2, or 3;
- R is a hydrogen atom or a C1-C18 linear or branched alkyl or alkenyl group;
- each R′ independently is a hydrogen atom or a moiety having the formula:
- wherein:
- R is defined as above;
- t is 0, 1, or 2;
- each R″ independently is a hydrogen atom or a moiety having the formula;
- wherein:
- R is defined as above;
- u is 0, 1, or 2;
- and
- each X independently is a moiety having the formula:
- wherein:
- R1 is a C2-C8 linear or branched alkanediyl;
- and
- n is an integer in a range from 1 to 10, inclusive.
A composition comprising a Mannich base reaction product of
- at least one di-substituted or tri-substituted Mannich base compound comprising bis-(dimethylaminomethyl)phenol, tris-(dimethylaminomethyl)phenol, or a combination thereof;
- and
- at least one N,N′-dimethyl secondary diamine polymer comprising methylamine-terminated poly-(N-methyl-azetidine), methylamine-terminated poly-(N-methyl-azacycloheptane), or a combination thereof.
Dependencies are inferred from the claim text.