Patent ID: 8183321
Filing Date: 2012-05-22
Classification: C08L

Abstract:
1. An impact modified polylactide resin comprising a continuous polymer matrix having from 5 to 10% by weight of impact modifier particles dispersed therein, wherein a) at least 90% by weight of the continuous polymer matrix is one or more polylactides, b) the impact modifier is distributed within the polylactide resin as larger particles or agglomerates or both having a diameter of at least 150 nanometers and smaller particles or agglomerates having a diameter of from 10 to 150 nanometers, such that upon imaging a planar surface of the blend using transmission electron spectroscopy, 1) the imaged area of the larger particles and agglomerates constitute from 60 to 95% of the total area of the imaged particles and 2) the number average particle size of all particles and agglomerates is no greater than 210 nanometers; wherein the impact modifier is a core-shell rubber characterized by having (1) a crosslinked rubbery core having a T (2) a shell of a polymer having a T (3) a refractive index in the range of from 1.430 to 1.485 and further wherein has a dart impact strength of from 4 to 20 ft-lbs (5.4-27 J) and a haze of no greater than 10%.