ABSTRACT
The development of polyurethane (PU) adhesives can be traced back more than 50 years to the pioneering efforts of Otto Bayer and coworkers. Professor Bayer extended the chemistry of PUs, initiated in 1937, into the realm of adhesives in about 1940 by combining polyester
CONTENTS
13.1 Historical ............................................................................................................................. 393 13.2 Consumption and Growth ............................................................................................... 396 13.3 Applications ........................................................................................................................ 396 13.4 Fundamentals of Adhesion .............................................................................................. 397
13.4.1 Adhesive Forces ..................................................................................................... 397 13.4.2 Surface Wetting ...................................................................................................... 398 13.4.3 Adhesive Joint ........................................................................................................ 398 13.4.4 Adhesive Modulus ................................................................................................. 399
13.5 Bonding PU .........................................................................................................................400 13.5.1 Quality Control on Incoming Raw Materials ....................................................400 13.5.2 Substrate Preparation ............................................................................................400 13.5.3 Application of Bonding Agent ............................................................................. 401
13.6 Formulating PU Adhesives ..............................................................................................402 13.6.1 Raw Materials .........................................................................................................403
