C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/14 (2006.01) C08K 3/34 (2006.01) C08K 5/1515 (2006.01) C08L 67/04 (2006.01)
Patent
CA 2738068
A foam precursor mixture of polylactic acid (PLA) resin having a D-lactic acid content that is about 3 mole % or less; nucleating agent; chain extender; and hydrocarbon blowing agent is provided. The foaming mixture is substantially free of a crosslinking agent. The foam premixture can be used to prepare PLA foams having improved heat resistance, lower densities, smaller cells, and higher cell counts. PLA foams in accordance with the invention may be useful for preparing thermoformed articles such as trays. PLA foamed articles may be prepared that exhibit heat resistance above a temperature of about 49° C or more, and in particular, a heat resistance at 5 minutes of exposure in excess of about 74° C.
Amrutiya Nilesh
Nawaby A. Victoria
Ramesh Natarajan S.
Amrutiya Nilesh
Nawaby A. Victoria
Ramesh Natarajan S.
Ridout & Maybee Llp
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