skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
 [1]
  1. Farragut, TN
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
867814
Patent Number(s):
5015718
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
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 = {1991},
month = {1}
}

Patent:

Save / Share: