Stabilized enzymatic detergent compositions
The present disclosure relates to a stable, low-foaming enzymatic detergent compositions and methods of making and using the same. In a preferred embodiment, the enzymatic detergent compositions are particularly useful for cleaning medical and dental instruments. In a preferred embodiment, the enzymatic detergent compositions demonstrate stability after storage for at least about 4 weeks and at temperatures greater than room temperature.
1 . A low-foaming, enzymatic liquid detergent composition comprising:
from about 10 wt. % to about 60 wt. % of a polyol, wherein the polyol is a mixture comprising glycerin, sorbitol and propylene glycol;
from about 1 wt. % to about 5 wt. % of an enzyme; wherein the enzyme comprises a protease, a lipase and an amylase;
from about 1 wt. % and about 15 wt. % of a buffer, wherein the buffer comprises a mixture of an alcohol amine and a C1-C6 polycarboxylic acid; wherein the alcohol amine comprises ethanolamine, wherein the C1-C6 polycarboxylic acid comprises citric acid;
from about 0.1 wt. % to about 10 wt. % of a preservative, wherein said preservative is an isothiazolinone; and
from about 15 wt. % to about 75 wt. % water;
wherein the composition is a liquid and provides a pH of between about 6.5 and about 9.5 during use; wherein the composition during use provides about ½ of an inch or less of foam at about 40° C. after about 15 seconds; wherein the composition has less than 0.5 wt. % of borate containing compounds; wherein the composition has less than 0.5 wt. % of an amine oxide; and wherein the composition has less than 0.5 wt. % of an alkyl polyglucoside.
2 . The composition of claim 1 , wherein the polyol is in a concentration between about 15 wt. % and about 60 wt. %.
3 . The composition of claim 1 , wherein the enzyme is in a concentration of between about 2 wt. % and about 4 wt. %.
4 . The composition of claim 3 , wherein the enzyme is in a concentration between about 2 wt. % and about 3.5 wt. %.
5 . The composition of claim 1 , wherein the composition further comprises a corrosion inhibitor, a defoamer, a water conditioning agent, a short chain alkylbenzene and/or alkyl naphthalene sulfonate, or a combination thereof.
6 . The composition of claim 5 , wherein the water conditioning agent is a polyacrylic acid polymer.
7 . The composition of claim 5 , wherein the defoamer comprises an EO/PO block copolymer.
8 . The composition of claim 1 , wherein the composition has a pH of between about 7 and about 9.
9 . The composition of claim 7 , wherein the composition further comprises a C8-C13 branched alcohol alkoxylate.
10 . A method of manufacturing the enzymatic detergent composition of claim 1 comprising:
combining and mixing the polyol; the enzyme; the buffer; and the water to form the detergent composition.
11 . The method of claim 10 , wherein the enzyme is combined and mixed last.
12 . A method of cleaning a surface comprising:
diluting the composition of claim 1 to form a cleaning solution, wherein the cleaning solution has a concentration of between about 500 ppm to about 5000 ppm;
contacting the surface with the cleaning solution;
rinsing the surface with water.
13 . The method of claim 12 , wherein the contacting step comprises submerging the surface in the cleaning solution.
14 . The method of claim 12 , further comprising a presoak step prior to the contacting step.
15 . The method of claim 12 , wherein the diluting step is at a dilution ratio of between about 1/32 oz/gal and about 1 oz/gal.
16 . The method of claim 12 , wherein the surface is an instrument, wherein the instrument is soiled with blood and/or mammalian tissue; wherein the blood and/or mammalian tissue are removed from the instrument during the contacting and/or rinsing steps; wherein the contacting step is performed at a temperature between about 50° F. and about 150° F.; wherein the cleaning solution has a concentration of between about 1000 ppm and about 4000 ppm; and wherein the method further comprising a disinfecting step; and wherein the disinfecting step is performed with a sanitizer and/or at a temperature greater than about 200° F.
17 . The method of claim 12 , wherein the surface is ware; wherein the cleaning solution has a concentration of between about 100 ppm and about 5000 ppm; and wherein the contacting step is performed at a temperature between about 50° F. and about 180° F.
18 . The method of claim 17 , wherein the cleaning solution has a concentration of between about 250 ppm and about 2500 ppm; and wherein the cleaning solution has a pH of between about 6.5 and about 9.5; and wherein the cleaning solution provides about ½ of an inch or less of foam at about 40° C. after about 30 seconds.