Adhesives and method for making the same
Abstract
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".
- Inventors:
-
- Farragut, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 867814
- Patent Number(s):
- 5015718
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C - CHEMISTRY C09 - DYES C09J - ADHESIVES
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- adhesives; 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; /528/
Citation Formats
Dorsey, George F. Adhesives and method for making the same. United States: N. p., 1991.
Web.
Dorsey, George F. Adhesives and method for making the same. United States.
Dorsey, George F. Tue .
"Adhesives and method for making the same". United States. https://www.osti.gov/servlets/purl/867814.
@article{osti_867814,
title = {Adhesives and method for making the same},
author = {Dorsey, George F},
abstractNote = {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".},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}