US4772425A — Light duty liquid dishwashing composition contain…

Claim 1

Independent Claim 271 words

A process of making a light duty liquid detergent composition containing an abrasive which comprises the steps of (1) preparing a substantially fully hydrated aqueous clay suspension by shearing a thixotropic clay-water mixture containing 4% to 18% by weight of a colloidal clay until a subtantially constant viscosity is reached; (2) preparing an aqueous surfactant concentrate containing from 17% to 70% by weight of a mixture of at least one anionic sulfated or sulfonated detergent and a foam boosting ingredient selected from the group consisting of a zwitterionic betaine surfactant, a trialkyl amine oxide detergent containing a C 10 -C 16 alkyl group and a C 8 -C 18 alkanoic acid C 2 -C 3 alkanolamide; (3) dispersing a porous, low-density, particulate abrasive selected from the group of calcined diatomaceous earth and particulate polymeric plastic materials having a specific gravity of from 0.75 to 1.5 in said aqueous detergent mixture with sufficient agitation to disperse the particles and release entrapped air; (4) continuing said agitation until a substantially deaerated dispersion is obtained; (5) adding the substantially fully hydrated clay suspension of step 1 to the deaerated dispersion of step 4 with agitation at a speed sufficient to disperse said suspension without aeration of the mixture; and (6) continuing said agitation while monitoring the viscosity until a substantially constant minimum viscosity is obtained after an initial increases to a viscosity maximum, whereby a stable detergent composition is produced consisting essentially of, by weight, 10% of 50% of a mixture of anionic detergent and said foam booster 1% to 3% of said clay, 3% to 15% of said abrasive and the balance water.

Claim 2

Dependent Claim 271 words

A process of making a light duty liquid detergent composition containing an abrasive which comprises the steps of (1) preparing a substantially fully hydrated aqueous clay suspension by shearing a thixotropic clay-water mixture containing 4% to 18% by weight of a colloidal clay until a subtantially constant viscosity is reached; (2) preparing an aqueous surfactant concentrate containing from 17% to 70% by weight of a mixture of at least one anionic sulfated or sulfonated detergent and a foam boosting ingredient selected from the group consisting of a zwitterionic betaine surfactant, a trialkyl amine oxide detergent containing a C 10 -C 16 alkyl group and a C 8 -C 18 alkanoic acid C 2 -C 3 alkanolamide; (3) dispersing a porous, low-density, particulate abrasive selected from the group of calcined diatomaceous earth and particulate polymeric plastic materials having a specific gravity of from 0.75 to 1.5 in said aqueous detergent mixture with sufficient agitation to disperse the particles and release entrapped air; (4) continuing said agitation until a substantially deaerated dispersion is obtained; (5) adding the substantially fully hydrated clay suspension of step 1 to the deaerated dispersion of step 4 with agitation at a speed sufficient to disperse said suspension without aeration of the mixture; and (6) continuing said agitation while monitoring the viscosity until a substantially constant minimum viscosity is obtained after an initial increases to a viscosity maximum, whereby a stable detergent composition is produced consisting essentially of, by weight, 10% of 50% of a mixture of anionic detergent and said foam booster 1% to 3% of said clay, 3% to 15% of said abrasive and the balance water.

Claim 3

Dependent Claim 37 words

A process according to claim 1 wherein said aqueous surfactant concentrate contains a C 2 -C 3 alcohol in an amount sufficient to provide a detergent composition containing from 2% to 9% by weight of said alcohol.

Claim 4

Dependent Claim 49 words

A process according to claim 2 wherein said abrasive is said calcine diatomaceous earth having a particle size range, by weight, in which about 20% to 45% of the particles are larger than 44 microns, with a minimum of 5% to 15% of particles being larger than 149 microns.

Claim 5

Dependent Claim 14 words

A process according to claim 3 wherein said betaine is the foam boosting ingredient.

Claim 6

Dependent Claim 16 words

A process according to claim 3 wherein said alkanoic acid alkanolamide is the foam boosting ingredient.

Claim 7

Dependent Claim 66 words

A process according to claim 4 wherein said aqueous surfactant concentrate contains a mixture of a water-soluble salt of a C 9 -C 15 alkylbenzene sulfonate and a water-soluble salt of a C 8 -c 16 alkyl polyethenoxy ether sulfate having 1 to 12 ethenoxy groups in the molecule and the concentration of surfactant in said concentrate is from about 28% to about 62% by weight.

Claim 8

Dependent Claim 64 words

A process according to claim 5 wherein the said aqueous surfactant concentrate contains a mixture of a water-soluble salt of a C 10 -C 20 alkane sulfonate and a water-soluble salt of a C 8 -C 16 alkyl polyethenoxy ether sulfate having 1 to 12 ethenoxy groups and the concentration of surfactant in said concentrate is from about 28% to about 62% by weight.

Claim 9

Dependent Claim 32 words

A process according to claim 6 wherein said clay dispersion contains 6% to 12% by weight of said clay and said surfactant concentrate contains about 32% to 59% by weight of surfactants.

Claim 10

Dependent Claim 237 words

A light duty liquid detergent composition containing an abrasive which consists essentially of, by weight, 3% to 15% of a particulate, low density abrasive selected from the group consisting of calcined diatomaceous earth and polymeric plastic materials having a specific gravity of 0.75 to 1.5 suspended in an aqueous mixture containing 8% to 48% of at least one water-soluble, detergent salt selected from the group consisting of an anionic sulfate or aionic sulfonate or mixtures thereof containing an alkyl group or an alkenyl group having from 8 to 20 carbon atoms in the molecule, 2% to 5% of a foam boosting zwitterionic betaine detergent which increases the viscosity of the continuous phase having the formula: ##STR3## wherein R 1 is an alkyl group having 10 to 20 carbon atoms or the amido radical R--C(O)N(H)(CH 2 ) a -- wherein RCO is an acyl group having about 10 to 20 carbon atoms and a is an integer from 1 to 4, R 2 and R 3 are each alkyl groups having 1 to 3 carbon atoms, 1% to 3% of a substantially fully hydrated aqueous clay suspension prepared by shearing a thioxotropic clay-water mixture until a substantially constant viscosity is reached, and the balance water wherein said liquid detergent is agitated while monitoring the viscosity until a substantially constant minium viscosity is obtained after an initial increase to a viscosity maximum, whereby a stable detergent composition is produced.

Claim 11

Dependent Claim 237 words

A light duty liquid detergent composition containing an abrasive which consists essentially of, by weight, 3% to 15% of a particulate, low density abrasive selected from the group consisting of calcined diatomaceous earth and polymeric plastic materials having a specific gravity of 0.75 to 1.5 suspended in an aqueous mixture containing 8% to 48% of at least one water-soluble, detergent salt selected from the group consisting of an anionic sulfate or aionic sulfonate or mixtures thereof containing an alkyl group or an alkenyl group having from 8 to 20 carbon atoms in the molecule, 2% to 5% of a foam boosting zwitterionic betaine detergent which increases the viscosity of the continuous phase having the formula: ##STR3## wherein R 1 is an alkyl group having 10 to 20 carbon atoms or the amido radical R--C(O)N(H)(CH 2 ) a -- wherein RCO is an acyl group having about 10 to 20 carbon atoms and a is an integer from 1 to 4, R 2 and R 3 are each alkyl groups having 1 to 3 carbon atoms, 1% to 3% of a substantially fully hydrated aqueous clay suspension prepared by shearing a thioxotropic clay-water mixture until a substantially constant viscosity is reached, and the balance water wherein said liquid detergent is agitated while monitoring the viscosity until a substantially constant minium viscosity is obtained after an initial increase to a viscosity maximum, whereby a stable detergent composition is produced.

Claim 12

Dependent Claim 76 words

A composition according to claim 9 wherein sasid anionic sulfonate or sulfate detergent is a mixture of a water-soluble C 9 -C 15 alkylbenzene sulfonate salt or a water-soluble C 10 -C 20 alkane sulfonate salt and a water-soluble C 8 -C 16 akyl polythenoxy ether sulfate salt having 1 to 12 ethenoxy groups in the molecule, the weight ratio of said sulfonate salt to said sulfate salt being in the range of 10:1 to 1:4.

Claim 13

Dependent Claim 66 words

A composition according to claim 10 wherein said anionic detergent is a mixture of said alkylbenzene sulfonate salt and said alkyl polyethenoxy ether sulfate salt, said abrasive is said calcined diatomaceous earth and the balance of said composition is a mixture of water and said C 2 -C 3 alcohol, said alcohol being present in an amount of 2% to 9% by weight of the composition.

Claim 14

Dependent Claim 25 words

A composition according to claim 11 wherein said anionic detergent mixture is present in an amount of 18% to 38% by weight of the composition.

Claim 15

Dependent Claim 65 words

A composition according to claim 10 wherein said anionic detergent is a mixture of said alkane sulfonate salt and said alkyl polyethenoxy ether sulfate salt, said abrasive is said calcined diatomaceous earth and the balance of said composition is a mixture of water and C 2 -C 3 alkanol, said alcohol being present in an amount of 2% to 9% by weight of the composition.

Claim 16

Dependent Claim 25 words

A composition according to claim 13 wherein said anionic detergent mixture is present in an amount of 18% to 38% by weight of the composition.

Claim 17

Dependent Claim 40 words

A composition according to claim 11 wherein said anionic detergent mixture is present in an amount of 23% to 33% by weight of the composition and the proportion of total surfactants is 25% to 35% by weight of the composition.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-09-20	1992-03-21	1992-09-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-09-20	1996-03-21	1996-09-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-09-20	2000-03-21	2000-09-20	$7700.00	Window Closed / Lapsed

Light duty liquid dishwashing composition containing abrasive

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