DEGRADABLE MATERIALS

The present disclosure relates to a degradable material comprising (a) from about 60 weight percent to about 97 weight percent of a first material based on the total weight of the degradable material, and (b) from about 3 weight percent to about 40 weight percent of a second material based on the to...

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Main Authors MICHAEL D. CRANDALL, SASHA B. MYERS, YONG K. WU, IGNATIUS A. KADOMA, RUDOLPH J. DAMS, SIEGMUND PAPP, MICHELLE M. HEWITT, JAY M. JENNEN
Format Patent
LanguageEnglish
Spanish
Published 15.07.2013
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Summary:The present disclosure relates to a degradable material comprising (a) from about 60 weight percent to about 97 weight percent of a first material based on the total weight of the degradable material, and (b) from about 3 weight percent to about 40 weight percent of a second material based on the total weight of the degradable material, where the second material is an oligomer comprising lactate and giycolate. In another aspect, the present disclosure provides a degradable material comprising (a) poly lactic acid, and (b) an oligomer comprising lactate and giycolate, wherein the degradable material has a Tg less than 56°C. In still another aspect, the present disclosure provides a degradable material comprising (a) poly lactic acid, and (b) an oligomer comprising lactate and giycolate, wherein the degradable material has a tan delta peak of less than 65°C. It has been surprisingly found that the degradable materials according to the present disclosure provide physical properties that are not inherent to poly lactic acid alone. It has also been surprisingly found that the degradable materials disclosed herein provide improvements with respect to the processability, production costs, flexibility and ductility without decreasing their degradability. La presente invención se refiere a un material degradable que comprende: (a) desde aproximadamente 60 por ciento en peso hasta aproximadamente 97 por ciento en peso de un primer material basado en el peso total del material degradable, y (b) desde aproximadamente 3 por ciento en peso hasta aproximadamente 40 por ciento en peso de un segundo material basado en el peso total del material degradable, en donde el segundo material es un oligómero que comprende lactato y glicolato. En otro aspecto, la presente descripción proporciona un material degradable que comprende: (a) el ácido poliláctico, y (b) un oligómero que comprende lactato y glicolato, en donde el material degradable tiene una Tg menor que 56 °C. En todavía otro aspecto, la presente descripción proporciona un material degradable que comprende: (a) el ácido poliláctico, y (b) un oligómero que comprende lactato y glicolato, en donde el material degradable tiene un pico tan delta de menos de 65 °C. Se ha encontrado sorprendentemente que los materiales degradables de acuerdo con la presente descripción proporcionan propiedades físicas que no son inherentes al ácido poliláctico solo. También se ha encontrado sorprendentemente que los materiales degradables descritos aquí proporcionan mejoras con respecto a la procesabilidad, los costos de producción, la flexibilidad y la ductilidad sin reducir su degradabilidad.
Bibliography:Application Number: MX20130006168