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US 7,063,970 B1Granted
Enzymatic preservation of water based paints
AssigneeNorozymes A/S
InventorsCharlotte Johansen, Claus Crone Fuglsang
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Abstract
A preserved and/or conserved water based paint composition comprising an oxidoreductase, an oxidizing agent, a binder and at least 10% w/w water.
Claims18
A paint composition comprising
- (a) a peroxidase or laccase;
- (b) an enhancer (i) of the following formula:
- wherein A is —D, —CH═CH—D, —CH═CH—CH═CH—D, —CH═N—D, —N═N—D, or —N═CH—D, in which D is selected from the group consisting of —CO—E, —SO2—E, —N—XY, and N+—XYZ, in which E is —H, —OH, —R, or —OR, and X, Y and Z are identical or different and are —H or —R;
- wherein R is a C1–C16-alkyl group, which is saturated or unsaturated, branched or unbranched, and unsubstituted or substituted with a carboxy, sulpho or amino group;
- and B and C are identical or different and are CmH2m+1, wherein m is 1, 2, 3, 4 or 5;
- or (ii) is an inorganice halide ion;
- (c) an oxidizing agnet;
- (d) a viscosifier selected from the group consisting of polyarcylates, polyurethane and cellulose derivatives;
- (e) an acrylic compound;
- (f) at least 10% w/w water;
- (g) a pigment;
- and
- (h) a solvent.
10 more elements
Dependencies are inferred from the claim text.