Flame-retardant polylactic acid (PLA) by grafting through of phosphorus-containing polymers directly to PLA backbone
US9187597B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Oct 21, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/128
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Flame-retardant polylactic acid-backbone graft and bottlebrush copolymers are synthesized by polymerizing a lactide-functionalized phosphorus-containing macromonomer using ring-opening polymerization (ROP). In some embodiments of the present invention, the macromonomer is a lactide-functionalized phosphorus-containing polymer that may be synthesized by, for example, polymerizing a phosphorus-containing monomer capable of undergoing radical polymerization (e.g., styrenic, vinylic, acrylic, etc.) using a brominated lactide initiator via atom transfer radical polymerization (ATRP). The brominated lactide initiator may be 3-bromo-3,6-dimethyl-1,4-dioxane-2,5-dione prepared by, for example, reacting lactide with N-bromosuccinimide in the presence of benzoyl peroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.