Flame retardant polylactic acid compounds
US9062201B2 · kind B2 · utility
3Cited by
23References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Apr 12, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K21/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A significant disadvantage of the use of polylactic acid (PLA), lack of flame retardance, has been overcome by the use of polyphosphonate-co-carbonate in combination with an impact modifier, a drip suppressant, and optionally, an epoxy functional styrene-acrylate oligomeric chain extender. The compound achieves a UL 94 rating of V-0 or V-1 and a Notched Izod value of more than about 5 ft-lbs/in. The compound also exceeds a threshold of 100° C. in heat deflection temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.