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Preparation and properties of waterborne poly(urethane urea)s for adhesives: The effects of the 2,2-bis(hydroxylmethyl)propionic acid content on the properties

✍ Scribed by Yong Sil Kwak; Eun Young Kim; Byung Ha Yoo; Han Do Kim


Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
275 KB
Volume
94
Category
Article
ISSN
0021-8995

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A two-step process for lactic acid polymerization is studied: in the first step the lactic acid is condensation-polymerized to a low-molecular-weight hydroxylterminated prepolymer; and then the molecular weight is raised by joining prepolymer chains together using diisocyanate as the chain extender.