Impact modified polylactide
Patent 5908918 Issued on June 1, 1999. Estimated Expiration Date: 
May 26, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 26, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 084563 filed on 05/26/1998US Classes:528/354, From compound having -C-C(=O)-O-C- group as part of a heterocyclic ring, e.g., lactone, etc.523/124, Composition containing an additive which enhances degradation by environmental stimuli or process of preparing524/306, Ester having at least two carboxylic acid ester groups524/310, OH group other than as part of a COOH group, e.g., castor oil, etc.524/315, Carboxylic acid ester524/317, Oxygen atom other than as part of a carboxylic acid group, e.g., glycolic ester, etc.524/320, Oxygen atom other than as part of a COOH or derivative group528/361From ether, metal alcoholate, or alcohol group-containing carboxylic acid; or from a derivative of a carboxylic acid which derivative contains an ether, metal alcoholate, or alcohol groupExaminersPrimary: Truong, DucAttorney, Agent or FirmForeign Patent References
International ClassC08G 063/08AbstractThe present invention is directed to degradable blends containing polylactide, a degradable impact modifier, and a degradable plasticizer for use in packaging films. The degradable impact modifier can be a degradable, non-toxic elastomer or a degradable, non-toxic, non-elastomeric polymer having a low glass transition temperature, such as polycaprolactone and poly(ethylene glycol). The degradable plasticizer can be any plasticizer having a relatively low molecular weight, a high degree of miscibility with polylactide, and non-toxicity. The film has excellent flexibility and impact strength for packaging applications.Other References
Field of SearchFrom compound having -C-C(=O)-O-C- group as part of a heterocyclic ring, e.g., lactone, etc.From ether, metal alcoholate, or alcohol group-containing carboxylic acid; or from a derivative of a carboxylic acid which derivative contains an ether, metal alcoholate, or alcohol group Composition containing an additive which enhances degradation by environmental stimuli or process of preparing Ester having at least two carboxylic acid ester groups OH group other than as part of a COOH group, e.g., castor oil, etc. Carboxylic acid ester Oxygen atom other than as part of a carboxylic acid group, e.g., glycolic ester, etc. Oxygen atom other than as part of a COOH or derivative group | |
