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Hydrolytic stability and physical properties of waterborne polyurethane based on hydrolytically stable polyol

: Park, S.H.; Chung, I.D.; Hartwig, A.; Kim, B.K.


Colloids and surfaces. A 305 (2007), No.1-3, pp.126-131
ISSN: 0927-7757
Journal Article
Fraunhofer IFAM ()

New type of polyester polyol with alkyl side groups, viz. poly(2,4-diethyl-1,5-pentamethylene adipate) glycol (PDPAD) was synthesized and applied to improve the hydrolytic stability of polyurethane dispersions (PUD), and the results were compared with conventional poly(tetrarnethylene adipate) glycol (PTAD)-based PUD. It was found that PDPAD-based PUD gave much higher hydrolytic stability in spite of great water swell than the PTAD-based PUD which showed higher hardness, modulus, and tensile strength. Tailor-made properties were possibly obtained by combining the two types of polyol.