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Patent US10597528
Issued 2020-03-24
Polymer Composition For The Manufacture Of Injection Moulded Articles
This invention relates to a polymer composition that is particularly suitable for use in the manufacture of injection moulded articles, which can be biodegraded in industrial composting. This invention also relates to a process for the production of the said composition and articles obtained thereby.
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- 1. A polymer composition for the production of injection moulded articles comprising, with respect to the sum of components i.-v.:
i) 20-60% by weight of at least one polyester i. comprising:
a) a dicarboxylic component comprising with respect to the total dicarboxylic component:
a1) 0-20% in moles of units deriving from at least one aromatic dicarboxylic acid,
a2) 80-100% in moles of units deriving from at least one saturated aliphatic dicarboxylic acid,
a3) 0-5% in moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid;
b) a diol component comprising, with respect to the total diol component:
b1) 95-100% in moles of units deriving from at least one saturated aliphatic diol;
b2) 0-5% in moles of units deriving from at least one unsaturated aliphatic diol;
ii) 30-60% by weight of at least one polyhydroxyalkanoate ii.; iii) 0.01-5% by weight of at least one cross-linking agent and/or a chain extender iii. comprising at least one compound having di- and/or multiple functional groups comprising isocyanate, peroxide, carbodiimide, isocyanurate, oxazoline, epoxy, anhydride, divinyl ether groups and mixtures thereof; iv) 0-10% by weight of at least one filler agent; v) 2-30% by weight of plant fibres.
