MECHANISM OF ACTION OF PHOSPHORUS-BASED FLAME RETARDANTS IN NYLON-6 .2. AMMONIUM POLYPHOSPHATE TALC

Authors
LEVCHIK SV LEVCHIK GF CAMINO G COSTA L
Citation
Sv. Levchik et al., MECHANISM OF ACTION OF PHOSPHORUS-BASED FLAME RETARDANTS IN NYLON-6 .2. AMMONIUM POLYPHOSPHATE TALC, Journal of fire sciences, 13(1), 1995, pp. 43-58
Citations number
13
Categorie Soggetti
Material Science",Engineering
Journal title
Journal of fire sciences → ACNP
ISSN journal
07349041
Volume
13
Issue
1
Year of publication
1995
Pages
43 - 58
Database
ISI
SICI code
0734-9041(1995)13:1<43:MOAOPF>2.0.ZU;2-5
Abstract
Talc added to PA-6 fire retardant with APP increases the oxygen index and upgrades the UL94 ranking to class V0. A chemical reaction of APP with talc, detected in the mixtures above 350-degrees-C, prevents vola tilization of polyphosphoric acid and increases the amount of thermall y stable solid residue. The inorganic phosphates that are formed impro ve the insulating properties of the intumescent layer on the surface o f burning PA-6, as compared to the use of APP alone.