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    • 4. 发明授权
    • Biopolymer-based thermoplastic mixture for producing biodegradable shaped bodies
    • 用于生产可生物降解成形体的生物聚合物基热塑性混合物
    • US06406530B1
    • 2002-06-18
    • US09462524
    • 2000-03-13
    • Holger BengsGitte Böhm
    • Holger BengsGitte Böhm
    • C08L302
    • C08J5/18B65D65/466C08J2303/00C08K5/0016C08L3/00C08L89/005C08L97/005C08L97/007Y02A40/961Y02W90/11Y02W90/13C08L2666/02
    • Thermoplastic mixture based on biopolymers for producing shaped biodegradable articles with improved properties, preparation of the mixture, and also its use. A novel thermoplastic mixture based on biopolymers, in particular on starch, features the presence of lignin and is used for producing shaped biodegradable articles with improved properties, preferably with improved mechanical properties. The mixture is preferably obtained by preparing, and mixing with one another, A) 100 parts by weight of one or more physiologically nonhazardous, biodegradable, thermoplastically processable polymeric materials selected from the group consisting of polysaccharides and proteins, preferably at least one starch of any type which is native, chemically modified, fermentative, recombinant and/or prepared by biotransformation, and/or derivatives of the starches mentioned; B) from 10 to 100 parts by weight of water; C) from 1 to 100 parts by weight of lignin; D) if desired, up to 50 parts by weight of at least one plasticizer; and E) if desired, up to 200 parts by weight, preferably not more than 100 parts by weight, of other conventional additives; where the components are thermoplastified with introduction of thermal and mechanical energy into the mixture, preferably at an elevated temperature and with simultaneous exertion of shear forces onto the mixture. Surprisingly, the use of lignin with thermoplastic materials based on biopolymers, in particular based on starch, leads to improved thermoplastic materials which have advantages in particular in terms of their mechanical properties or other performance characteristics.
    • 基于用于生产具有改进性能的成型可生物降解制品的生物聚合物的热塑性混合物,混合物的制备及其用途。 基于生物聚合物,特别是淀粉的新型热塑性混合物特征在于木质素的存在,并且用于生产具有改进性能的成型可生物降解制品,优选具有改善的机械性能。 该混合物优选通过制备和彼此混合获得,A)100重量份的选自多糖和蛋白质的一种或多种生理学上非危险的,可生物降解的,热塑性可加工的聚合材料,优选至少一种任何 天然,化学修饰,发酵,重组和/或通过生物转化制备的类型和/或所述淀粉衍生物; B)10至100重量份的水; C)1至100重量份的木质素 ; D)如果需要,最多50重量份的至少一种增塑剂; 和E),如果需要,最多200重量份,优选不超过100重量份的其它常规添加剂;其中组分通过将热和机械能引入混合物中,优选在升高的温度下并同时进行热塑化 在混合物上施加剪切力。 令人惊奇的是,使用基于生物聚合物,特别是基于淀粉的热塑性材料的木质素导致改进的热塑性材料,其特别是在它们的机械性能或其它性能特征方面具有优点。