Passive Fire Protective coatings (PFP) are applied at much higher thickness than most regular paints. Typical thicknesses are in the range of 0.1 inch to 0.75 inch (2.5-19mm). In many ways, it is best to think of PFP materials as composite plastics rather than as coatings. As such, physical properties that are important with a material applied at five mils may not be relevant to a coating applied at 100 times that thickness. Properties of thin film coatings that are considered attributes may not allow the PFP to cope with the rigors of in-service conditions. Vibration, flexing of steel members and rapidly changing temperatures can negatively impact thick film coatings. This paper explores the room temperature and low temperature properties of epoxy intumescent PFP coatings. Tensile properties and adhesion values at room temperature down to −40°C have been measured and will be discussed. A comparison between flexible, tough PFP coatings and hard, brittle PFP coatings based on apparent glass transition temperatures, adhesion, tensile strength, and elongation will be presented.

Subject
Test methods, Zinc rich coatings, Coatings, Materials, Moduli, Adhesive strength, Epoxy coatings, Mechanical failure, Shear, Elongation, Tensile strength, Passive fire protection, Epoxies
Keywords:
Passive fire protection, intumescent, low temperature, tensile strength, adhesion
© 2011 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2011
Association for Materials Protection and Performance (AMPP)
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