Adhesives and method for making the same
- Farragut, TN
A thermosetting mixture for use as an adhesive, as well as other applications, that is substantially nonmutagenic. This mixture is based upon a thermosetting resin selected from polyurethane and epoxy resins, using an improved curing agent that does not contain mutagenic components. Specifically, the curing agent is a multi-mixture of substituted alkylanilines produced by an improved process. These alkylanilines are formed by condensation of at least two 2,6-dialkylanilines with a formaldehyde in an acid solution. Upon purification, at least three aromatic diamines are formed that are used for the curing agent with the polyurethane and epoxy resisn. Pot life, green strength and ultimate strength are comparable to adhesives of the prior art that contain mutagenic constituents. Although several dianilines are described, the preferred curing agents are formed using 2,6-diethylaniline (DEA) and 2,6-diisopropylaniline (DIPA), where the mole % of DEA and DIPA is 38-48 and 62-52, respectively. Curing agents within the preferred range have been designated as "Asilamine 4852" and "Asilamine 4555".
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Number(s):
- US 5015718
- OSTI ID:
- 867814
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
method
thermosetting
mixture
adhesive
applications
substantially
nonmutagenic
based
resin
selected
polyurethane
epoxy
resins
improved
curing
agent
contain
mutagenic
components
specifically
multi-mixture
substituted
alkylanilines
produced
process
formed
condensation
6-dialkylanilines
formaldehyde
acid
solution
purification
aromatic
diamines
resisn
pot
life
green
strength
ultimate
comparable
prior
constituents
dianilines
described
preferred
agents
6-diethylaniline
dea
6-diisopropylaniline
dipa
mole
38-48
62-52
respectively
range
designated
asilamine
4852
4555
curing agents
thermosetting resin
improved process
acid solution
curing agent
epoxy resin
epoxy resins
resin selected
substituted alkyl
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