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US 9,309,403 B2Granted
Heat resistant, flame retardant polylactic acid compounds
AssigneePolyOne Corporation
InventorJing Liu
Life of this patent
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Abstract
Significant disadvantages of the use of polylactic acid (PLA), lack of good heat stability and flame retardance, have been overcome by the use of resorcinol bis(diphenyl phosphate) in combination with talc. The compound achieves a threshold of 65° C. in heat deflection temperature and V-0 flame retardance at 1.6 mm thickness.
Claims9
A heat resistant, flame retardant, polylactic acid compound, comprising:
- (a) polylactic acid in an amount from about 30 to about 35 weight percent of the compound;
- (b) polycarbonate in an amount from about 50 to about 60 weight percent of the compound;
- (c) talc in an amount from about 2 to about 5 weight percent of the compound;
- and
- (d) resorcinol bis (diphenyl phosphate) in an amount from about 10 to about 13 weight percent of the compound;
- wherein the compound has a heat distortion temperature of greater than 75 degrees C. when tested according to ASTM D-648 at 66 PSI;
- and
- wherein the compound has a V-0 rating when tested according to ASTM Test No. D-635 at both 3.2 mm and 1.6 mm thicknesses.
5 more elements
Dependencies are inferred from the claim text.