# US 2018/0023039 A1 · Use of amino carboxylate for enhancing metal protection in alkaline detergents

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- Number: US 2018/0023039 A1
- Document ID: US20180023039A1
- Status: Published application
- Kind: A1
- Application number: 15/723,855
- Filed: 2017-10-03
- Published: 2018-01-25
- Earliest claimed: 2013-10-29
- Assignees: Ecolab USA Inc.
- Applicants: Ecolab USA Inc.
- Inventors: LISA MAUREEN SANDERS; ANDREW M. JENSEN; KRISTOPHER HODGSON
- Web page: https://patentgrep.com/patent/US20180023039A1

## CPC

- C11D 3/33: Amino carboxylic acids
- C11D 1/66: Non-ionic compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)}
- C11D 3/0073: {Anticorrosion compositions}
- C11D 3/044: {Hydroxides or bases}
- C11D 3/08: Silicates
- C11D 3/10: Carbonates {; Bicarbonates}
- C11D 3/2086: {Hydroxy carboxylic acids-salts thereof}
- C11D 17/0047: {Detergents in the form of bars or tablets}
- C11D 17/0052: {Cast detergent compositions}
- C11D 17/0073: {Tablets}
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

The invention includes ware detergent compositions which prevent buildup of precipitates and also surprisingly provides significant metal protection of items exposed to alkaline detergent composition. According to the invention alkaline ware detergents may include an effective amount of amino carboxylate. Surprisingly, detergents which included amino carboxylate also provided significant metal protection against corrosion, even when traditional corrosion inhibiting components are reduced.

## Claims

### Claim 1

A solid alkaline detergent composition comprising:
from about 0.5 wt. % to about 90 wt. % of an alkalinity source;
from about 1 wt. % to about 7.5 wt. % of a surfactant;
a metal protecting component comprising a silicate and an amino carboxylate, wherein said metal protecting component comprises 33.5 wt. % or less of said detergent composition.

### Claim 2 (depends on 1)

The detergent of claim 1 wherein said alkalinity includes an alkali metal hydroxide, or a carbonate.

### Claim 3 (depends on 1)

The composition of claim 1, wherein said surfactant includes one or more nonionic surfactants.

### Claim 4 (depends on 1)

The composition of claim 1, further comprising a chelant.

### Claim 5 (depends on 1)

The composition of claim 1 further comprising a corrosion inhibitor.

### Claim 6 (depends on 1)

The composition of claim 1 wherein said source of alkalinity is sodium carbonate.

### Claim 7 (depends on 1)

The composition of claim 1 wherein said solid detergent is a pressed solid.

### Claim 8 (depends on 1)

The composition of claim 1 wherein said solid detergent is an extruded solid.

### Claim 9 (depends on 1)

The composition of claim 1 wherein said solid detergent is a cast solid.

### Claim 10

A solid alkaline detergent composition comprising:
from about 0.5 wt. % to about 90 wt. % of a carbonate alkalinity source;
from about 1 wt. % to about 7.5 wt. % of one or more nonionic surfactants;
from about 15 wt. % to about 30 wt. % of a silicate;
from about 0.01 to about 3.5 wt. % of an amino carboxylate;
from about 0.1 wt. % to about 15 wt. % of a corrosion inhibitor;
form about 1 wt. % to about 10 wt. % of chelant; and
from about 1 wt. % to about 10 wt. % of water.

### Claim 11 (depends on 10)

The composition of claim 10, wherein said corrosion inhibitor comprises one or more of a maleic acid co polymer or an acrylic acid polymer.

### Claim 12 (depends on 10)

The composition of claim 10, wherein the nonionic surfactant comprises ethylene oxide, propylene oxide, or a combination of ethylene and propylene oxide.

### Claim 13 (depends on 10)

The composition of claim 10, wherein the solid detergent is a solid.

### Claim 14 (depends on 10)

The composition of claim 10, wherein the solid detergent is a solid selected from the group comprising a cast solid, a pressed solid, or an extruded solid.

### Claim 15

A method of cleaning ware while preventing magnesium carbonate accumulation from hard water comprising:
applying a detergent composition to ware surface;
wherein the detergent composition comprises a carbonate alkalinity, a nonionic surfactant, an amino carboxylate in an amount effective for metal protection and preventing magnesium carbonate accumulation; and
a silicate in an amount effective for metal protection;
and there after rinsing said ware.

### Claim 16 (depends on 15)

The method of claim 15 wherein said ware includes an alkaline sensitive metal surface.

### Claim 17 (depends on 15)

the method of claim 15 wherein aid alkaline sensitive metal includes aluminum.

### Claim 18 (depends on 15)

The method of claim 15, wherein the use solution is generated within a ware washing machine.

### Claim 19 (depends on 15)

The method of claim 15, further comprising the step of generating a use solution of the detergent composition, wherein the detergent use solution has a pH between about 9 and 12.5.

### Claim 20 (depends on 15)

The method of claim 15 wherein said amino carboxylate is present in said detergent composition in an amount of no more than 3.5 wt. %.