AU629809B2 - Creamy scouring compositions - Google Patents

Description

POP Code: 44135/44135 6012q/1

VT

6298099 CREAMY SCOURING COMPOSITIONS Lellis Francis BRAGANZA

S.

5* 0

B

5505 0S S. S

S.

*5 S. S 0

S.

SSS

S S S. S S5 S. *5 0

*SSSOS

Technical Field The present invention re~lates to stable, viscous abrasive-containing scouring compositions, which show excellent cleaning, ease-oF-rinsing, andi shine performance, These compositions are substantially free of thickener, 0 *0 S B S 05 rk The formulation of abrasive-containing scouring compositions in creamy form is well-Lnown, signing Insert DATE of Declared at Cincinnati, Ohio,U. S.A.

signinDate Signature(s) of D declarant(s) m) .""Ricrd i'Charles Witte Nte: No legalization or other witness required ssis.tan.t S cretar.y THE PROCTER GAMBLE COMPANY To: The Commissioner of Patents THE PROCTER GAMBLE COMPANY To: The Com m issioner of Patents PHILLIPS ORMONDE FITZPATRICK -2- 2 Such compositions have been disclosed in, e.g. E.P.A. 0 126 545, and E.P.A. 0 216 416, US Patent 4.676.920, and Canadian Patent 1.194.381.

In such state-of-the-art scouring creams, it has always been necessary to incorporate a thickener, in order to adequately suspend the abrasive particles, and give a certain viscosity to the finished product.

It has been found, however, that thickener materials have certain drawbacks, in terms of ease-of-rinsing performance especially. In recent formulations, the levelof thickeners has been reduced, but still remains 0 non-negligible.

"ogo It has now been found that abrasive-containing creamy scouring compositions can be formulated which are 0e substantially free of thickener, Ihdeed, it has been found that certain combinations of surfactant, non-polar solvent, and electrolyte provides I the desired viscosity and are capable of suspending high levels of abrasive-particles.

The same combination also provides very good cleaning ease-of-rinsing, and shine performance, Summary of the Invention The present invention relates to viscous creamy scouring compositions which contain an abrasive in suspension, are substantially free of thickener, and contain a combination of a surfactant, a solvent with a water-solubility under and an electrolyte.

L, Z i iLnow" I 2a According to the present invention there is provided an abrasive-containing scouring creamy composition containing from 2% to 10% total weight of composition of surfactant from 1% to 10% total weight of composition of a solvent having a water-solubility in deionized water from 0 to 5% at from 0.5% to 8% total weight of composition of electrolyte selected from the group consisting of alkali metal sulfates, carbonates, bicarbonates, hcaide c'i4cAt Anitrates and mixtures thereof less than 0.2% total weight of composition of thickener.

-3b 355

A

.j'i fNT; 3 3 Detailed Description of the Invention Surface-active Agents Water-soluble surfactants useful herein include synthetic anionic, nonionic, amphoteric and zwitterionic surfactants and mixtures thereof.

The anionic surfactants for use herein include C18 alkyl benzene sulfates and sulfonates, paraffin sulfonates, olefin sulfonates, and also ethoxylated species such as 08-18 alkyl polyethoxy sulfates, and sulphosuccinates, Preferred anionic surfactants include 12-4 alkyl benzene sulfonate, and 124 alkyl ethoxylated sulfate containing from 1 to 10 ethylene oxide units, A C ethoxylated anionic 3 times ethoxylated is 12-14 sold by AKZO under the trade name ELFAN The anionic detersiue surfactants are most commonly used in the form of their sodium, potassium or triethanolammonium salts, Nonionic surfactants include alkoxylated (especially ethoxylated) alcohols, alkyl phenols, and amine oxides. Ethoxylated alcohol of the formula RO(CH2CH 2 0)n with R being a 12-15 alkyl chain and n being a number from 6 to 10, are preferred .nonionic surfactants.

The anionic surface-active agents herein are present at levels of from 0.3 to preferably 3% to 8%.

F,

W, M 4 Preferred are mixtures of non-ethoxylated anionic surfactants and ethoxylated anionic surfactants, at ratios of from 1/1 to 4/1.

Especially suitable are mixtures of alkyl benzene sulfonates and alkyl ethoxylated sulfates.

If present, nonionic surfactants are used at levels of from 0.1% to 6% by weight of the composition.

The total level of surfactant is from 2% to 10% by weight of the composition.

Abrasive The abrasive types employed herein are selected from water-insoluble materials well-known in the literature for their relatively mild abrasive properties. It is highly preferred that the abrasives used herein not be undesirably "scratchy". Abrasive materials having a Mohs hardness in the range of about 7, or below, are typically used; abrasives having a Mohs hardness of 3, or below, can be used to avoid scratches on aluminium or stainless steel finishes. Suitable abrasives herein include inorganic materials, especially such materials as calcium carbonate and diatomaceous earth, as well as materials such as Fuller's earth, magnesium carbonate, China clay, attapulgite, calcium hydroxyapatite, calcium orthophosphate, dolomite and the like. The aforesaid inorganic materials can be qualified as "strong abrasives". Synthetic organic abrasives such as urea-formaldehyde, methyl methacrylate melamine-formaldehyde "e resins, polyethylene spheres and polyvinylchloride can be advantageously used in order to avoid scratching on certain surfaces, especially plastic surfaces. When such "soft abrasives" are used, strong builders can be incorporated in i 0 the composition.

*e o *oeo t I r i t- I _li -I Typically, abrasives have a particle size range of 10-1000 microns and are used at concentrations of 5% to in the compositions, Organic solvent Organic solvents for use herein showed have a water-solubility of from 0 to 5% at 25 0 C in pure, deionised water, preferably less than 1% and most preferably less than Suitable solvents include hexyl carbitol, 1(2-n-butoxy-l-methylethoxy) propane-2-ol (butoxypropoxypropanol), and 2-ethyl-1,3-hexanediol.

Carbitol solvents are compounds of the 0 2-(2-alkoxyethoxy)ethanol class.

Mixtures of solvents can be used, provided the water solubility of the mixture is in the above-specified range. Thus, water-soluble solvents can be used in minor quantities, such as water-soluble carbitol solvents including ethyl, propyl or butyl carbitol, and water-soluble cellosolve solvents.

The organic solvent is present at levels of from 1% to 10%; preferably From 2% to 6%, Electrolyte The electrolytes used in the compositions are selected from the group consisting of alkali metal sulfates, alkali metal carbonates or bicarbonates, alkali metal halides and citrates as well as alkali metal nitrates and mixtures thereof. The electrolytes or their mixture may vary from to 8% basis formula weight with the preferred range of about 0.5% to 3.54, with the alkali metal bicarbonates and carbonates and Miixtures thereof being the preferred forms.

i i r 6 Optional ingredients In addition to the essential ingredients listed hereinbefore, the present composition can contain additional components, which can be highly desirable.

For example, it is highly preferred that the compositions contain a detergent builder and/or metal ion sequestrant. Compounds classifiable and well-known in the art as detergent builders include the nitrilotriacetates, (NTA), ethylene diamine tetraacetate (EDTA), amino-polyphosphonates (DEQUEST), water-soluble phosphates s-rhPoPCaUPha:'- such as gip_ p..p..nate.. and sodium ortho- and pyro-phosphates, silicates, and mixtures thereof. These Sbuilders are preferably not used in combination with strong abrasives like calcium carbonate, but are recommended in combination with soft organic abrasives like polyvinylchloride.

Metal ion sequestrants of lower metal sequestration constant can advantageously be used in combination with strong or soft abrasives. Those metal ion sequestrants include polycarboxylates, citrates.

S

It may be appropriate, as well, to include soaps in the compositions of the invention. Soaps prepared from coconut oil fatty acids are preferred.

Soaps can be used in amounts ranging from 0.2% to 3% by weight of the composition.

VA

7 Another optional component in the compositions herein is represented by an amine oxide having the formula (Ri)x (Ri)z R- N CH2)n N (R)y o )p m wherein R is an alkyl or alkenylgroup having 10 to 22 carbon atoms, the Ri's which are identical or different are selected from C 1 -4 alkyl, ethylene oxide and propylene oxide, n is an integer from 1 to 6, m is an integer from 0 to 6, p is 0 or 1, x, y, and z are each 1 for alkylsubstituents, and integers in the range from 1 to 10 for ethylene oxide or propylene oxide substituents such that fhe sum of is not greater than This amine oxide component is used in a level from 0.1% to preferably from 0.25% to 0.75%.

Suitable species of the amine oxide component for use herein correspond to the general formula above wherein the individual substituents can be varied as follows R tallow C 1 6 1 8 alkyl; coconut C 1 2 -1 4 alkyl; lauryl; palmityl; stearyl; oleyl.

R

1 ethylene oxide; propylene oxide; methyl; ethyl.

n 2, 3, 4.

m 0, 1, or 2.

x, y, and z are each 1, 2, 3 or 4 and their sum is from 2 to 18.

I I i 8 Preferred amine oxides for use herein are defined by the following substituents R C 12 18 alkyl.

R

1 ethylene oxide; methyl.

m 0 or 1; n 3 (assuming m is different from 0).

x, y, z are each at least 1 and their sum is in the range from 2 to 12, for example 2, 3, 7 and 12.

One particularly preferred class of amine oxide species is represented by mono-amine oxides having the following substituents.

m 0.

R

1 methyl; ethyl; ethylene oxide.

R coconut C 1 2 1 4 alkyl.

*oo* x and y are both 1.

A specific example of this preferred class of mono-amine oxides is N- C 1 2 14 coconut alkyl N,N-dimethyl amine yxide.

Thickeners should preferably not be included in the compositions of the invention. If they are, the level will be kept under Common thickeners such as the polyacrylates, xanthan gums, carboxymethyl celluloses, swellable smectite clays, and the like, can De used herein at these levels.

S.o Optional compounds are also represented by ingredients typically used in commercial products to provide aesthetic or additional product performance benefits. Typical ingredients include pH regulants, perfumes, dyes, optital brighteners, soil suspending agents, detersive enzymes, gel-control agents, freeze-thaw stabilizers, bactericides, preservatives, hydrotrope and the like.

9- The compositions herein typically contain up t~o about water as a carrier. By way of example the water-)euel can vary in the range from e~g. 50% to 80%. Water-alcohol ethanol, isopropanol, butanol, etc.) mixtures can also be used.

The compositions herein are preferably formulated in the alkaline pH range, generally in the range of pH1 8-11, preferably about 10-10,8, Caustics such as sodium hydroxide and sodium bi-carbonate can be used to adjust and buffer the pH as desired, The following examples given by way of illustrating the composition$ herein, but are not intended to be limiting of the scope of the invention.

Abbreviations S.4 4 4* S. S5* 5

OS..

SOS.

Sq

B

SS

4 *4 5* 4 S S S p 5' *4 9 *4 p 5 4* 4 S S

S

4 5*.

S S

SB

NaPS

LAS

ELFAN 243 S Sok ala n H 02 B ET HO

TMPD

P P Sodium C013 to C 1 paraffin sulfonate Sodium salt of linear C 1-9 alkyl benzene sulfonate 0 12-14 alkyl ethoxylated sulfate Crosslinked polyacrylate thickener 2-Ethyl-1, 3-hexanediol 2,2, 4-trimethyl-1-3-pentanediol Butoxy Propoxy Propanol Ingredients Comp, A Camp, B Comp C Camp D Camp E Camp F Camp G wt) 0*e 0F 4 0*

S

*5 0*0S 6 S0 4 9 0O 0

S

00 LAS 5.0 ELFAN 243S NaPS n-BPP ETHD hexyl carbitol 5.0 perfume mix 0.4 CaCO 3 30.0 Na 2CO 3 1.0 Sokolan PHC25 HCnFA*amine oxide** water minors 5.0 4,2 1.8 3.0 0.4 30.0 3.0 0.4 30.0 2.3 3.0 0.4 30.0 1.5 4.0 0.4 0.4 0.4 30.0 1.5 30.0 0.8 30.0 1.8 5.0 4.0 4.2 015 0.1 up to 100 *4 Compositions A to 0 were stable after 2 weeks at roam temperature and had apparezxt-yiscosities in the range *.:1000-3000O cps (Brookfiled viscQmeterp hpindle 4, 60 rpm). The compositions were found to have excellent cleaning capacity on greasy kitchen-dirt soil and hard bath-tub soil.

Varrow cut, hardened, coconut fatty acid 1 2 1 4 coconut alkylo -N,N-dimethylamine oxide Wp 0890H

Claims (7)

1. An abrasive-containing scouring creamy composition containing from 2% to 10% total weight of composition of surfactant from 1% to 10% total weight of composition of a solvent having a water-solubility in deionized water from 0 to 5% at from 0.5% to 8% total weight of composition of electrolyte selected from the group consisting of alkali metal sulfates, carbonates, bicarbonates, h^ctAde. cA-C+es Anitrates and mixtures thereof less than 0.2% total weight of composition of thickener.

2. A composition in accordance with claim 1 wherein the solvent has a water-solubility below 1%.

3. A composition in accordance with either claim 1 or 2 wherein the solvent is selected from the group of hexyl carbitol, n-Butoxy Propoxy Propanol and 2-ethyl 1-3 hexanediol.

4. A composition in accordance with any one of claims 1 to 3 wherein the surfactant contains an ethoxylated anionic surfactant.

5. A composition in accordance with any one of claims 1 to 4 wherein the surfactant is a mixture of non-ethoxylated anionic surfactant and ethoxylated anionic S surfactant, at ratios from 1/1 to 4/1.

6. A composition in accordance with any one of claims 1 to 5 wherein the surfactant is present at levels of from 3% to the solvent is present at levels of from 2% to 36 and the electrolyte is present at levels of from 0.5% to 3.5% total weight of composition.

7. A composition according to claim 1 substantially as described herein with reference to any one of the examples. DATED: 12 August 1992 PHILLIPS ORMONDE FTIZIpATfel* i Patent Attorneys For: OoA.d THE PROCTER GAMBLE COMPANY (3426) ,^M