# US 4,395,345 A · Free-flowing phosphate/silicate cogranulates containing hydrophobing substance(s)

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- Number: US 4,395,345 A
- Document ID: US4395345A
- Status: Granted
- Kind: A
- Application number: 06/309,757
- Filed: 1981-10-08
- Granted: 1983-07-26
- Earliest claimed: 1980-10-10
- Assignees: Lever Brothers Company
- Inventors: Kurt Walz; Peter Dittmann; Hartmut Hohne
- Web page: https://patentgrep.com/patent/US4395345A

## CPC

- C11D 3/06: Phosphates, including polyphosphates
- C11D 1/04: Carboxylic acids or salts thereof (soap C11D9/00)
- C11D 3/2079: {Monocarboxylic acids-salts thereof}
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

Cogranulates of alkalimetal tripolyphosphates and alkalimetal silicates are known as basic ingredients for machine dishwashing compositions. They can suffer from dispensability problems, and by inclusion in the cogranulates of a hydrophobing substance, such as calcium stearate, the dispensability can be improved.

## Claims

### Claim 1

Cogranulates of alkalimetal tripolyphosphates and alkalimetal silicates with improved dispensability, said cogranulates comprising from 5 to 60 percent by weight of the alkalimetal tripolyphosphates, from 95 to 40 percent by weight of the alkalimetal silicates, and from 0.05 to 5 percent by weight of a hydrophobing substance, selected from the group consisting of paraffins, silicones, insoluble fatty acid salts and zeolites.

### Claim 2 (depends on 1)

Cogranulates according to claim 1, comprising from 20 to 45 percent by weight of the alkalimetal tripolyphosphates, from 80 to 55 percent by weight of the alkalimetal silicates and from 0.1 to 1.0 percent by weight of the hydrophobing substance.

### Claim 3 (depends on 1)

Cogranulates according to claim 1, in which the hydrophobing substance is calcium stearate.

### Claim 4 (depends on 1)

Cogranulates according to claim 1, in which the hydrophobing substance is a zeolite.