# US 4,397,777 A · Heavy duty laundry detergent

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- Number: US 4,397,777 A
- Document ID: US4397777A
- Status: Granted
- Kind: A
- Application number: 06/170,987
- Filed: 1980-07-18
- Granted: 1983-08-09
- Earliest claimed: 1974-09-13
- Assignees: Colgate-Palmolive Company
- Inventors: Joseph A. Yurko
- Web page: https://patentgrep.com/patent/US4397777A

## CPC

- C11D 1/37: Mixtures of compounds all of which are anionic
- C11D 3/128: {Aluminium silicates, e.g. zeolites (C11D3/1253 takes precedence)}
- C11D 1/14: derived from aliphatic hydrocarbons or mono-alcohols
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

This invention relates to heavy duty laundry detergent compositions comprising a water-soluble mixture of paraffin sulfonate detergent, olefin sulfonate detergent and sodium silicate plus a water-insoluble molecular sieve or colloidal silica.

## Claims

### Claim 1

A heavy duty particulate laundry detergent composition comprising in weight percentages, 12% paraffin sulfonate wherein the paraffin alkyl group is from 14 to 20 carbons with an average of 15 carbons, 6% higher olefin sulfonate produced by sulfonating an alpha-olefin of 15 to 20 carbons with about one equivalent of diluted sulfur trioxide, neutralizing with excess sodium hydroxide and heating the alkaline mixture above 150.degree. C. to open the sultone rings in the mixture, 25% polysilicate of the formula Na.sub.2 SiO.sub.3 wherein the ratio Na.sub.2 O to SiO.sub.2 is 1 to 2.5, 10% 4 A zeolite molecular sieve containing 2% moisture and having a mean particle diameter of 8.3 microns, 0.5% sodium carboxymethyl cellulose, 1% optical brightener, 0.5% perfume, 26.7% anhydrous sodium sulfate, 15% moisture and 3.3% other materials associated with paraffin and olefin sulfonates.

### Claim 2 (depends on 1)

A composition according to claim 1 comprising milled agglomerate particles.

### Claim 3 (depends on 2)

A composition according to claim 2 comprising particles of a size from 12 mesh to 200 mesh.