Composition
AssigneeAkzo Nobel N.V.
InventorsPeter Greenwood, Hans Lagnemo
Life of this patent
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Abstract
The present invention relates to a barrier composition comprising a dispersion, emulsion or solution of a polymer, starch or starch derivative; colloidal silica particles and a curing agent capable of cross-linking said polymer, starch or starch derivative and coupling said silica particles thereto. The invention also relates to a barrier layer obtainable from said barrier composition and a method of providing such composition and layer. The invention also relates to a laminated packaging material comprising a substrate layer and a barrier layer formed from a barrier composition on at least one side of the substrate layer. The invention also relates to the use thereof, inter alia to provide a packaging container, a barrier film etc.
Claims15
A method of producing an aqueous composition comprising mixing colloidal silica particles;
- a polymer, starch or starch derivative;
- and a curing agent in a dispersion, wherein the curing agent is capable of cross-linking said polymer, starch or starch derivative and coupling the silica particles to said polymer, starch or starch derivative.
An aqueous composition comprising colloidal silica particles;
- at least one polymer, starch, or a starch derivative;
- and a curing agent capable of cross-linking said polymer, starch or starch derivative.
A barrier layer obtained by drying an aqueous composition obtained by mixing colloidal silica particles;
- a polymer, starch or starch derivative;
- and a curing agent in a dispersion, wherein the curing agent is capable of cross-linking said polymer, starch or starch derivative and coupling the silica particles to said polymer, starch or starch derivative.
Dependencies are inferred from the claim text.