DLA Piper LLP (US)
Biodegradable material and method of producing biodegradable material
A biodegradable material is a chemically cross-linked product between a multivalent compound A having 3 or more functional groups X such as hydroxyl group; and a multivalent compound B having 3 or more functional groups Y such as carboxyl group wherein chemical cross-linkage(s) is/are formed by condensation reaction of the functional group(s) X and the functional group(s) Y; wherein (y+z)/(x+z) is 1.2 to 4.0 when MA>MB, and (x+z)/(y+z) is 1.2 to 4.0 when MA<MB; wherein x represents the number of the functional group(s) X not condensed with the functional group(s) Y; y represents the number of the functional group(s) Y not condensed with the functional group(s) X; z represents the number of the cross-linkage(s); MA represents weight average molecular weight of the multivalent compound A; and MB represents weight average molecular weight of the multivalent compound B.
Toray Industries, Inc.
C C C C A A C A C A A A
C08L C08L C08G C08L A61L A61L C08L A61L C08G A61L A61L A61L
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Kazuhiro Masaki Megumi
Tanahashi Fujita Nakanishi