Emulsions with improved stability
AssigneeElantas PDG, Inc.
InventorsThomas J. Murray, Bharathi Balagam
Life of this patent
Estimating the term…
Abstract
Disclosed are methods of lowering application viscosities of or of reducing or eliminating monomer content in electrical impregnating materials comprising or consisting of an emulsion of an unsaturated polyester or a mixture of unsaturated polyesters, water, at least one radical polymerization initiator or radical polymerization initiator/promoter mixture, at least one surfactant having an HLB-value of greater than 15, optionally at least one reactive diluent, and optionally further additives, a process for preparing zero or low VOC electrical impregnation materials, a method of impregnating electrical or electromechanical devices and a method of increasing the stability of aqueous emulsions of unsaturated polyesters.
Claims20
A method of impregnating or coating an electrical or electromechanical device, wherein the method comprises adding a low VOC emulsion to the electromechanical device and curing the applied emulsion, the low VOC emulsion comprising
- a1) an unsaturated polyester or a mixture of unsaturated polyesters,
- a2) water,
- b) at least one radical polymerisation initiator or a mixture of radical polymerisation initiator and promoter,
- c) at least one surfactant having an HLB-value of greater than 15,
- d) optionally, at least one reactive diluent, and
- e) optionally, further additives.
Dependencies are inferred from the claim text.