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Article: Application of statistical experimental strategies to the process optimization of waterborne polyurethane.
- Article from:
- Polymer Engineering and Science
- Article date:
- April 1, 1995
- Author:
CopyrightCOPYRIGHT 1995 Society of Plastics Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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INTRODUCTION
A queous polyurethane (PU) dispersions have received considerable attention in the past few decades due to their successful applications in coatings and adhesives (1, 2). An aqueous PU dispersion is a binary colloidal system in which PU particles are dispersed in a continuous water phase. Particle size (particle diameter) is var-iable from approximately 10 to 5000 nm and dependent upon a number of parameters. Particle size has a direct impact on PU dispersion stability, with dispersions possessing relatively large average particle sizes (> 1000 nm) being generally unstable with respect to sedimentation. Smaller average particle sizes (
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