Surfactants
AssigneeNycomed Imaging AS
InventorsPer Strande, Harald Dugstad, Balin Balinov, Jan Alfheim, Joseph Arukwe
Life of this patent
Estimating the term…
Abstract
The present invention provides a polyethylene glycol (PEG) ester surfactant comprising at least one polyethylene glycol moiety and at least one fatty acyl moiety characterized in that said moieties are linked by a linkage incorporating a biodegradable methylene diester unit of formula (I) --CO.O.C(R.sup.1)(R.sup.2).O.CO-- (I) where R.sup.1 and R.sup.2 may, for example, each be a hydrogen atom or a monovalent organic group attached through a carbon atom or R.sup.1 and R.sup.2 together may, for example, form a divalent organic group attached through carbon atoms.
Claims10
A polyethylene glycol ester surfactant comprising at least one polyethylene glycol moiety and at least one fatty acyl moiety characterised in that said moieties are linked by a linkage incorporating a biodegradable methylene diester unit of formula (I)
- --CO.O.C(R.sup.1)(R.sup.2).O.CO-- (I)
- where R.sup.1 and R.sup.2 each represents a hydrogen atom or a monovalent organic group attached through a carbon atom or R.sup.1 and R.sup.2 together form a divalent organic group attached through carbon atoms.
Dependencies are inferred from the claim text.