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Difurfuryl diisocyanates: New adhesives derived from renewable resources
Author(s) -
Holfinger Michael S.,
Conner Anthony H.,
Lorenz Linda F.,
Hill Charles G.
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070490214
Subject(s) - adhesive , materials science , composite material , renewable resource , polymer science , polymer chemistry , renewable energy , layer (electronics) , electrical engineering , engineering
The syntheses of difurfuryl diisocyanates [e.g., ethylidenebis (2,5‐furandiylmethylene) diisocyanate (EDFI)] have been reported in the literature. Difurfuryl diisocyanates are structurally similar to diphenylmethane diisocyanate (MDI), which has proven to be an excellent adhesive for bonding wood composites. The MDI regin is synthesized from petroleum‐derived chemicals; the EDFI resin is synthesized from biomass‐derived chemicals. In this study, the mechanical properties of aspen flakeboards bonded with MDI and EDFI are compared. In general, results show that the strength properties of flakeboards bonded with MDI are only marginally better than those bonded with EDFI. Because EDFI is more viscous than is MDI less than optimum atomization of the EDFI resin during spraying of the flakes is believed to be largely responsible for the differences in strength property values. The dry internal bond strength values of flakeboards bonded with MDI (1.33 MPa; 193 lb/in. 2 ) at 3% resin content are significantly greater than the 0.41 MPa (60 lb/in. 2 ) required by the American National Standards Institute (ANSI/A208.1) for type‐2 medium‐density particleboard. © 1993 John Wiley & Sons, Inc. This article is a US Government work and, as such, is in the public domain in the United States of America.