Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate
2007-09-26
2011-11-01
Miggins, Michael C (Department: 1782)
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
C428S036900, C220SDIG030, C206S524600, C206S524700, C524S269000, C524S314000, C524S556000, C523S124000
Reexamination Certificate
active
08048502
ABSTRACT:
Disclosed is a readily degradable resin composition having excellent biodegradability. Specifically disclosed is a readily degradable resin composition comprising: an aliphatic polyester (A) which has biodegradability; and an aliphatic polyester (B) which has a solution viscosity (η inh) of 0.25 dl/g or less as measured in a mixed solvent composed of m-chlorophenol and 1,2,4-trichlorobenzene at a weight-based ratio of 4:1 at a concentration of 0.4 g/dl and at a temperature of 30° C. and a melt viscosity of 50 Pa S or less as measured at 190° C. at a shear rate of 1 rad/s and is capable of biodegraded at a more rapid degradation rate than the aliphatic polyester (A). Also disclosed is a readily degradable resin composition comprising: an aliphatic polyester (A) which has biodegradability; and an aliphatic polyester (B′) which, when hydrolyzed, can release an acid showing a pH value of 2.0 or less when dissolved in water at a concentration of 0.005 g/ml and is capable of biodegraded at a more rapid degradation rate than the aliphatic polyester (A). Further disclosed is a biodegradable container comprising the readily degradable resin composition.
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Kogure Masahito
Yoshida Mitsuhiro
Yoshikawa Seishi
Hoffmann & Baron , LLP
Miggins Michael C
Toyo Seikan Kaisha Ltd.
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