Journal
POLYMER DEGRADATION AND STABILITY
Volume 95, Issue 12, Pages 2213-2225Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2010.08.019
Keywords
Hydromagnesite; Huntite; UltraCarb; Fire; Flame; Retardant
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Naturally occurring mixtures of hydromagnesite and huntite have found important industrial use. Their endothermic decomposition over a temperature range similar to that of commonly used polymers and their release of water and carbon dioxide, has led to such mixtures being successfully used as fire retardants. They have replaced aluminium hydroxide and magnesium hydroxide in many applications. The current understanding of the thermal decomposition mechanism of both minerals and their combination in natural mixtures has been reviewed and related to their fire retardant action. Both minerals contribute to the reduction in flammability of polymers although the extent of these interactions has not been fully investigated. However, the fire retardant mechanism of these minerals appears more complicated than either aluminium hydroxide or magnesium hydroxide. (C) 2010 Elsevier Ltd. All rights reserved.
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