Intrinsically flame retardant epoxy resin - Fire performance and background - Part I

A. Toldy, P. Anna, I. Csontos, A. Szabó, G. Marosi

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

The flame retardant effect of newly synthesized phosphorus-containing reactive amine, which can be used both as crosslinking agent in epoxy resins and as a flame retardant, was investigated. The effect of montmorillonite and sepiolite additives on the fire induced degradation was compared to pristine epoxy resin. The effect of combining the organophosphorous amine with clay minerals was also studied. It could be concluded that the synthesized phosphorus-containing amine, TEDAP can substitute the traditional epoxy resin curing agents providing additionally excellent flame retardancy: the epoxy resins flame retarded this way reach 960 °C GWFI value, 33 LOI value and V-0 UL-94 rating - compared to the 550 °C GWFI value, 21 LOI value and "no rate" UL-94 classification of the reference epoxy resin. The peak of heat release was reduced to 1/10 compared to non-flame retarded resin, furthermore a shift in time was observed, which increases the time to escape in case of fire. The flame retardant performance can be further improved by incorporating clay additives: the LOI and the HRR results showed that the optimum of flame retardant effect of clay additives is around 1 mass% filler level in AH-16-TEDAP system. Applying a complex method for mechanical and structural characterization of the intumescent char it was determined that the flame retarded system forms significantly more and stronger char of better uniformity with smaller average bubble size. Incorporation of clay additives (owing to their bubble nucleating activity) results in further decrease in average bubble diameter.

Original languageEnglish
Pages (from-to)2223-2230
Number of pages8
JournalPolymer Degradation and Stability
Volume92
Issue number12
DOIs
Publication statusPublished - Dec 2007

Fingerprint

Flame Retardants
Epoxy Resins
flame retardants
epoxy resins
Flame retardants
Epoxy resins
Fires
clays
Amines
flames
amines
Clay
bubbles
Clay minerals
Phosphorus
phosphorus
Bentonite
ratings
crosslinking
montmorillonite

Keywords

  • Clay
  • Degradation mechanism
  • Epoxy resin
  • Flame retardance
  • Organophosphorous reactive amine flame retardant

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Intrinsically flame retardant epoxy resin - Fire performance and background - Part I. / Toldy, A.; Anna, P.; Csontos, I.; Szabó, A.; Marosi, G.

In: Polymer Degradation and Stability, Vol. 92, No. 12, 12.2007, p. 2223-2230.

Research output: Contribution to journalArticle

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