Soil release coating for heat transfer surfaces
AssigneeEcolab Inc.
InventorsCynthia L. Ross, Michael E. Besse, Timothy A. Gutzmann
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Abstract
The invention relates to a coating composition film or barrier layer containing an inorganic salt composition having a phosphate and a carbonate source and a surfactant composition. The aqueous coating can be applied to surfaces in food preparation units. The compositions of the invention can be used in methods for coating hard surfaces of food preparation units by applying the aqueous material through a spray or other aerosol apparatus to form a uniform coating. Upon drying, the water from the coating can evaporate leaving an organic/inorganic film which can support baked-on food soil and promote easy removal.
Claims23
A barrier coating composition for heat transfer surfaces comprising:
- (a) about 0.1 to 99 wt-% of an inorganic salt composition having a phosphate source and a carbonate source in a weight ratio of about 10:1 to 1:8, and
- (b) about 0.01 to 30 wt-% of a surfactant composition;
- wherein the coating composition forms a substantially uniform barrier between the heat transfer surface and soil.
A barrier coating composition for heat transfer surfaces comprising:
- (a) about 0.25-90 wt-% of an inorganic salt composition consisting of an alkali metal phosphate and an alkali metal carbonate in a weight ratio about 4:1 to 1:1;
- and
- (b) about 0.015 to 25 wt-% of an anionic, amphoteric or nonionic surfactant and mixtures thereof
- wherein the coating composition forms a substantially uniform barrier between the heat transfer surface and soil.
A method for forming a barrier coating on a surface in a heated food preparation unit, which coating facilitates removal of hardened or baked-on food soils, said coating formed from an aqueous coating composition, which method comprises:
- applying an aqueous coating composition comprising:
- (a) about 0.1 to 30 wt-% of an inorganic salt composition consisting of an alkali metal phosphate and an alkali metal carbonate in a weight ratio of about 10:1 to 1:8;
- (b) about 0.1 to 20 wt-% of an anionic, amphoteric or nonionic surfactant and mixtures thereof;
- and
- (c) water;
- wherein the coating composition forms a substantially uniform barrier between the surface and the soil on drying.
Dependencies are inferred from the claim text.