Isocyanate curing of novolac-type ligno-phenol-formaldehyde resins

A. Tejado; G. Kortaberria; C. Peña; J. Labidi; J. M. Echeverria; I. Mondragon

doi:10.1016/j.indcrop.2007.07.009

Isocyanate curing of novolac-type ligno-phenol-formaldehyde resins

A. Tejado
, G. Kortaberria
, C. Peña
, J. Labidi
, J. M. Echeverria
, I. Mondragon^*

^*Corresponding author for this work

Bakelite Ibérica S.A.

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

This work proposes the use of a diisocyanate as curing agent for novolac-type lignin-phenol-formaldehyde (LPF) resins, instead of typical hexamethylene-tetraamine (HMTA), with the aim of overcoming the loss of reactivity of lignophenolic resins resulting from the introduction of lignin. Curing LPF resins with methylene-diisocyanate (MDI) and HMTA has been investigated through Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and rheological analysis. The analysis of experimental results shows that the proposed curing reaction with MDI gives similar results to those for HMTA-cured systems. However, MDI curing is faster than HMTA one and proceeds easier at lower temperatures.

Original language	English
Pages (from-to)	208-213
Number of pages	6
Journal	Industrial Crops and Products
Volume	27
Issue number	2
DOIs	https://doi.org/10.1016/j.indcrop.2007.07.009
Publication status	Published - Mar 2008
Externally published	Yes

Keywords

Isocyanate curing
Lignin
LPF resins
Novolac

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10.1016/j.indcrop.2007.07.009

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title = "Isocyanate curing of novolac-type ligno-phenol-formaldehyde resins",

abstract = "This work proposes the use of a diisocyanate as curing agent for novolac-type lignin-phenol-formaldehyde (LPF) resins, instead of typical hexamethylene-tetraamine (HMTA), with the aim of overcoming the loss of reactivity of lignophenolic resins resulting from the introduction of lignin. Curing LPF resins with methylene-diisocyanate (MDI) and HMTA has been investigated through Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and rheological analysis. The analysis of experimental results shows that the proposed curing reaction with MDI gives similar results to those for HMTA-cured systems. However, MDI curing is faster than HMTA one and proceeds easier at lower temperatures.",

keywords = "Isocyanate curing, Lignin, LPF resins, Novolac",

author = "A. Tejado and G. Kortaberria and C. Pe{\~n}a and J. Labidi and Echeverria, \{J. M.\} and I. Mondragon",

year = "2008",

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doi = "10.1016/j.indcrop.2007.07.009",

language = "English",

volume = "27",

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journal = "Industrial Crops and Products",

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TY - JOUR

T1 - Isocyanate curing of novolac-type ligno-phenol-formaldehyde resins

AU - Tejado, A.

AU - Kortaberria, G.

AU - Peña, C.

AU - Labidi, J.

AU - Echeverria, J. M.

AU - Mondragon, I.

PY - 2008/3

Y1 - 2008/3

N2 - This work proposes the use of a diisocyanate as curing agent for novolac-type lignin-phenol-formaldehyde (LPF) resins, instead of typical hexamethylene-tetraamine (HMTA), with the aim of overcoming the loss of reactivity of lignophenolic resins resulting from the introduction of lignin. Curing LPF resins with methylene-diisocyanate (MDI) and HMTA has been investigated through Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and rheological analysis. The analysis of experimental results shows that the proposed curing reaction with MDI gives similar results to those for HMTA-cured systems. However, MDI curing is faster than HMTA one and proceeds easier at lower temperatures.

AB - This work proposes the use of a diisocyanate as curing agent for novolac-type lignin-phenol-formaldehyde (LPF) resins, instead of typical hexamethylene-tetraamine (HMTA), with the aim of overcoming the loss of reactivity of lignophenolic resins resulting from the introduction of lignin. Curing LPF resins with methylene-diisocyanate (MDI) and HMTA has been investigated through Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and rheological analysis. The analysis of experimental results shows that the proposed curing reaction with MDI gives similar results to those for HMTA-cured systems. However, MDI curing is faster than HMTA one and proceeds easier at lower temperatures.

KW - Isocyanate curing

KW - Lignin

KW - LPF resins

KW - Novolac

UR - https://www.scopus.com/pages/publications/37449016292

U2 - 10.1016/j.indcrop.2007.07.009

DO - 10.1016/j.indcrop.2007.07.009

M3 - Article

AN - SCOPUS:37449016292

SN - 0926-6690

VL - 27

SP - 208

EP - 213

JO - Industrial Crops and Products

JF - Industrial Crops and Products

IS - 2

ER -

Isocyanate curing of novolac-type ligno-phenol-formaldehyde resins

Abstract

Keywords

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