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Title: Method of making thermally removable polyurethanes

Abstract

A method of making a thermally-removable polyurethane material by heating a mixture of a maleimide compound and a furan compound, and introducing alcohol and isocyanate functional groups, where the alcohol group and the isocyanate group reacts to form the urethane linkages and the furan compound and the maleimide compound react to form the thermally weak Diels-Alder adducts that are incorporated into the backbone of the urethane linkages during the formation of the polyurethane material at temperatures from above room temperature to less than approximately 90.degree. C. The polyurethane material can be easily removed within approximately an hour by heating to temperatures greater than approximately 90.degree. C. in a polar solvent. The polyurethane material can be used in protecting electronic components that may require subsequent removal of the solid material for component repair, modification or quality control.

Inventors:
 [1];  [1];  [2];  [3];  [1]
  1. Albuquerque, NM
  2. Livermore, CA
  3. late of Albuquerque, NM
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
874512
Patent Number(s):
US 6403753
Assignee:
Sandia Corporation (Albuquerque, NM)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; thermally; removable; polyurethanes; thermally-removable; polyurethane; material; heating; mixture; maleimide; compound; furan; introducing; alcohol; isocyanate; functional; reacts; form; urethane; linkages; react; weak; diels-alder; adducts; incorporated; backbone; formation; temperatures; temperature; approximately; 90degree; easily; removed; hour; polar; solvent; protecting; electronic; components; require; subsequent; removal; solid; component; repair; modification; quality; control; solid material; easily removed; /528/

Citation Formats

Loy, Douglas A, Wheeler, David R, McElhanon, James R, Saunders, Randall S, and Durbin-Voss, Marvie Lou. Method of making thermally removable polyurethanes. United States: N. p., 2002. Web.
Loy, Douglas A, Wheeler, David R, McElhanon, James R, Saunders, Randall S, & Durbin-Voss, Marvie Lou. Method of making thermally removable polyurethanes. United States.
Loy, Douglas A, Wheeler, David R, McElhanon, James R, Saunders, Randall S, and Durbin-Voss, Marvie Lou. 2002. "Method of making thermally removable polyurethanes". United States. https://www.osti.gov/servlets/purl/874512.
@article{osti_874512,
title = {Method of making thermally removable polyurethanes},
author = {Loy, Douglas A and Wheeler, David R and McElhanon, James R and Saunders, Randall S and Durbin-Voss, Marvie Lou},
abstractNote = {A method of making a thermally-removable polyurethane material by heating a mixture of a maleimide compound and a furan compound, and introducing alcohol and isocyanate functional groups, where the alcohol group and the isocyanate group reacts to form the urethane linkages and the furan compound and the maleimide compound react to form the thermally weak Diels-Alder adducts that are incorporated into the backbone of the urethane linkages during the formation of the polyurethane material at temperatures from above room temperature to less than approximately 90.degree. C. The polyurethane material can be easily removed within approximately an hour by heating to temperatures greater than approximately 90.degree. C. in a polar solvent. The polyurethane material can be used in protecting electronic components that may require subsequent removal of the solid material for component repair, modification or quality control.},
doi = {},
url = {https://www.osti.gov/biblio/874512}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Works referenced in this record:

Poly(urethane-imide)s—1
journal, January 1991


The application of the Diels-Alder reaction to polymers bearing furan moieties. 1. Reactions with maleimides
journal, August 1997