Back to results
US 2018/0002454 A1Published application
Graft copolymer
AssigneeGalderma S.A.
InventorKristoffer BERGMAN
Life of this patent
Estimating the term…
Abstract
A graft copolymer comprising: a core polymer comprising a crosslinked or non-crosslinked polysaccharide, a plurality of primary graft polymers covalently grafted to the core polymer, a plurality of secondary graft polymers covalently grafted to each primary graft polymer, an injectable dermal aesthetic formulation comprising such a graft copolymer and a method of preparing such a graft copolymer.
Claims15
A graft copolymer comprising:
- a core polymer comprising a crosslinked or non-crosslinked polysaccharide,
- a plurality of primary graft polymers covalently grafted to the core polymer,
- a plurality of secondary graft polymers covalently grafted to each primary graft polymer.
A method of preparing a graft copolymer comprising the steps:
- a) providing a core polymer comprising a crosslinked or non-crosslinked polysaccharide comprising a plurality of pendant functional groups,
- b) providing a primary graft polymer comprising a terminal functional group and a plurality of pendant functional groups,
- c) providing a secondary graft polymer comprising a terminal functional group,
- d) mixing the core polymer with the primary graft polymer under conditions allowing covalent binding of the primary graft polymer exclusively to the pendant functional groups of the core polymer via the terminal functional group of the primary graft polymer,
- e) mixing the grafted product of step d) with the secondary graft polymer under conditions allowing covalent binding of the secondary graft polymer exclusively to the pendant functional groups of the primary graft polymer via the terminal functional group of the secondary graft polymer.
2 more elements
Dependencies are inferred from the claim text.