HARD RENEWABLE POLYESTERS COMPOSITIONS WITH HIGH IMPACT STRENGTH AND HIGH TENSILE ELONGATION Russian patent published in 2017 - IPC C08L67/00 C08L67/04 C08L23/02 B29C45/00 C08L83/00 

FIELD: chemistry.

SUBSTANCE: additive can be dispersed as discrete physical domains in a continuous matrix of renewable polyester. The polymeric additive to improve impact resistance is polyolefin, styrene copolymer or polyvinyl acetate. The phase boundary modifier is silicone polymer, organosilicon compound and polyether copolymer, polyester, alkanediol, amine oxide, fatty acid ester or a combination thereof. Increased strain and stress at elongation lead to destruction of bonds in the renewable polyester matrix in the areas near the discrete domains. This can lead to formation of multiple pores near the discrete domains, which can contribute to energy dissipation under load and increased impact strength. To further enhance the composition ability to dissipate energy in the described manner, a phase boundary modifier can be added to the composition to reduce friction between the additive that increases the impact strength and renewable polyester, thereby enhancing the degree and uniformity of bonds destruction.

EFFECT: increased impact strength.

19 cl, 6 dwg, 3 tbl, 23 ex