Machine dishwasher water spot control composition

• US 5,240,632 A
• Filed: 08/19/1992
• Issued: 08/31/1993
• Est. Priority Date: 03/26/1986
• Status: Expired due to Term

• Current Assignee: Access Business Group International LLC (Alticor Incorporated)
• Original Assignee: Amway Corporation (Alticor Incorporated)
• Inventors: Brumbaugh, Ernest H.
• Primary Examiner(s): Lieberman, Paul
• Assistant Examiner(s): HARRIMAN, ERIN M
• Application Number:
  US07/932,641
• Time in Patent Office: 377 Days
• Field of Search: 252/95, 252/99, 252/102, 252/135, 252/174.12, 252/174.24, 252/DIG. 12
• US Class Current: 510/226
• CPC Class Codes: C11D 3/3761 in solid compositions
• CPC Class Codes: C11D 3/3769 (Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines
• CPC Class Codes: C11D 3/38609 Protease or amylase in solid compositions only
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence

Abstract

Water spot reduction compositions containing an oxygen bleach, a proteolytic enzyme, and a polyacrylate for use in cleaning dishes and the like in a machine dishwasher. The compositions effectively reduce the presence of water spots which form on dish surfaces and the like during machine dishwashing operations.

Claims

1. An automatic dishwasher detergent composition consisting essentially of:

from about 20 to about 80 percent by weight of a phosphate builder, based on anhydrous phosphate weight;

from about 0.5 to about 10 percent by weight surfactant;

from about 5 to about 40 percent by weight alkali metal silicate;

a quantity of an oxygen bleach sufficient to provide from about 0.05 to about 5 percent by weight available oxygen;

a quantity of proteolytic enzyme sufficient to provide from about 2 to about 200 KNPU per kilogram of said detergent composition; and

from about 0.1 to about 20 percent by weight polyacrylate, said polyacrylate having a molecular weight in the range from about 500 to about 200,000.

2. The detergent composition of claim 1 consisting essentially of:

from about 20 to about 40 percent by weight of said phosphate builder;

a quantity of said oxygen bleach sufficient to provide from about 0.1 to about 2% by weight available oxygen;

a sufficient amount of said enzyme to provide from about 4 to about 80 KNPU per kilogram of said detergent composition; and

from about 1 to about 10 percent by weight of said polyacrylate.

3. The detergent composition of claim 2 consisting essentially of:

a sufficient quantity of said oxygen bleach to provide from about 0.25 to about 1 percent by weight available oxygen;

a sufficient amount of said enzyme to provide from about 10 to about 40 KNPU per kilogram of said detergent composition; and

from about 2.5 to about 5 percent by weight of said polyacrylate.

4. The detergent composition of claim 3 in which said polyacrylate has a molecular weight of from about 1,000 to about 10,000.

5. The detergent composition of claim 4 wherein said phosphate compound is a polyphosphate.

6. The detergent composition of claim 1 in which said polyacrylate has a molecular weight of from about 1,000 to about 10,000.

7. The automatic dishwashing composition of claim 6 wherein said phosphate compound is a polyphosphate.

8. The detergent composition of claim 1 in which said polyacrylate has a molecular weight of from about 1,000 to about 10,000.

9. The automatic dishwashing composition of claim 8 wherein said phosphate compound is a polyphosphate.

10. The automatic dishwasher detergent composition recited in claim 1 wherein said oxygen bleach is a water-soluble inorganic percompound selected from the group consisting of alkali and alkaline earth metal perborates, percarbonates, perphosphates and persulfates.

11. The automatic dishwasher detergent composition recited in claim 1 wherein said proteolytic enzyme is selected from the group consisting of trypsin, chymotripsin, pepsin, papain, bromelin, carboxylase, collagenuse, kecatinase, elastase, amino peptidase, subtilisin and aspergillopeptidase.

12. The automatic dishwasher detergent composition recited in claim 10 wherein said polyacrylate has a molecular weight of from about 1,000 to about 10,000.

13. The automatic dishwasher detergent composition recited in claim 12 wherein said polyacrylate is selected from the group consisting of polymers and copolymers of acrylic acid, methacrylic acid, esters of these acids, and acrylonitrile.

14. The automatic dishwashing composition of claim 1 wherein said phosphate compound is a polyphosphate.

15. The automatic dishwashing composition of claim 1 wherein said surfactant is selected from the group consisting of low-foaming fatty alcohol ethoxylates and ethylene oxide/propylene oxide block polymers.