Overview
ABSTRACT
Conventionally, polyurethanes are synthesized by step growth polymerization of diols (or polyols) and diisocyanates (or polyisocyanates). The variety of isocyanates and polyols makes it possible to generate a wide range of materials with different properties. Despite the many advantages of polyurethanes, their synthesis can raise issues due to the toxicity of isocyanates. In order to limit the risks for producers and users, non-isocyanate polyurethanes have been developed. The synthesis of such non-isocyanate polyurethanes, as well as properties and applications, mainly as adhesives for wood, are described in detail in this article.
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Siham AMIROU: Research engineer - Laboratory for the study and research of wood materials (LERMAB) - University of Lorraine, Épinal, France
INTRODUCTION
Polyurethane adhesives (PUs) are widely used in various industries. Due to the chemical versatility of PUs, there are many different types of PU adhesive . These are generally synthesized by a polyaddition reaction between polyols and diisocyanates.
Urea-formaldehyde and phenol-formaldehyde resins, commonly used in wood adhesives , are highly sensitive...
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KEYWORDS
wood | adhesives | Polyurethane | non-isocyanate
CAN BE ALSO FOUND IN:
Development of biobased isocyanate-free polyurethanes (NIPUs) for wood adhesives
Wood glues
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