US4859358A — Liquid automatic dishwashing compositions contain…

Claim 1

Independent Claim 101 words

A liquid automatic dishwashing detergent composition comprising: (a) from 0% to about 5% of bleach-stable surfactant; (b) from about 5% to about 40% of detergency builder; (c) hypochlorite bleach to yield available chlorine in an amount of from about 0.3% to about 2.5%; (d) from about 0.25% to 20% of a thickening agent; (e) from about 0.05% to about 0.3% of a metal salt of a long chain hydroxy fatty acid to inhibit tarnishing in silverware; and (f) the balance being water and minor ingredients; said composition having a yield value of from about 50 to about 350 dynes/cm 2 .

Claim 2

Dependent Claim 101 words

A liquid automatic dishwashing detergent composition comprising: (a) from 0% to about 5% of bleach-stable surfactant; (b) from about 5% to about 40% of detergency builder; (c) hypochlorite bleach to yield available chlorine in an amount of from about 0.3% to about 2.5%; (d) from about 0.25% to 20% of a thickening agent; (e) from about 0.05% to about 0.3% of a metal salt of a long chain hydroxy fatty acid to inhibit tarnishing in silverware; and (f) the balance being water and minor ingredients; said composition having a yield value of from about 50 to about 350 dynes/cm 2 .

Claim 3

Dependent Claim 36 words

The composition of claim 1 wherein said metal salt of a long chain hydroxy fatty acid comprises a metal salt of a higher aliphatic hydroxy fatty acid having from about 8 to about 22 carbon atoms.

Claim 4

Dependent Claim 36 words

The composition of claim 2 wherein said metal salt of a long chain hydroxy fatty acid comprises a metal salt of a higher aliphatic hydroxy fatty acid having from about 12 to about 18 carbon atoms.

Claim 5

Dependent Claim 37 words

The composition of claim 3 wherein said metal salt of a long chain hydroxy fatty acid is selected from the group consisting of sodium, potassium, lithium, aluminum and zinc salts of a long chain hydroxy fatty acid.

Claim 6

Dependent Claim 18 words

The composition of claim 4 wherein the thickening agent is a high molecular weight polycarboxylate polymer thickening agent.

Claim 7

Dependent Claim 23 words

The composition of claim 5 wherein said metal salt of a long chain hydroxy fatty acid comprises a metal salt of hydroxystearic acid.

Claim 8

Dependent Claim 15 words

The composition of claim 6 wherein said metal salt of hydroxystearic acid is lithium hydroxystearate.

Claim 9

Dependent Claim 67 words

The composition of claim 7 which comprises from about 0.1% to about 5% of said bleach-stable surfactant and wherein said surfactant is a nonionic surfactant and is selected from the group consisting of ##STR12## having molecular weights of about 1900, wherein PO is propylene oxide, EO is ethylene oxide, and the molar ratio of PO to EO is from about 4:1 to about 5:1, and mixtures thereof.

Claim 10

Dependent Claim 27 words

The composition of claim 8 wherein said detergency builder is selected from the group consisting of sodium tripolyphosphate, sodium carbonate, potassium pyrophosphate, sodium pyrophosphate, and mixtures thereof.

Claim 11

Dependent Claim 17 words

The composition of claim 9 which additionally comprises from about 4% to about 10% of sodium silicate.

Claim 12

Dependent Claim 16 words

The composition of claim 10 which additionally comprises from about 0.5% to about 1.5% sodium hydroxide.

Claim 13

Dependent Claim 25 words

The composition of claim 5 which additionally comprises from about 0.1% to about 5% of a C 12 -C 18 alkyl ester of phosphoric acid.

Claim 14

Dependent Claim 26 words

The composition of claim 12 wherein the C 12 -C 18 alkyl ester of phosphoric acid comprises from about 0.15% to about 1.0% of the composition.

Claim 15

Dependent Claim 20 words

The composition of claim 13 wherein the alkyl ester of phosphoric acid is an ethoxylated alkyl ester of phosphoric acid.

Claim 16

Dependent Claim 19 words

The composition of claim 14 wherein said alkyl ester of phosphoric acid has up to about 4 ethoxylate units.

Claim 17

Dependent Claim 42 words

The composition of claim 15 wherein said ethoxylated alkyl ester of phosphoric acid has an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4.

Claim 18

Dependent Claim 21 words

The composition of claim 5 wherein the polycarboxylate polymer thickening agent comprises from about 0.2% to about 2% of the composition.

Claim 19

Dependent Claim 43 words

The composition of claim 17 wherein the polycarboxylate polymer thickening agent is selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible polyacrylic acid cross-linked with polyalkenyl polyether having a molecular weight of from about 750,000 to about 4,000,000; and mixtures thereof.

Claim 20

Dependent Claim 44 words

The composition of claim 4 which comprises from about 0.1% to about 5% of said bleach-stable surfactant and wherein said surfactant is an anionic surfactant and is selected from the group consisting of C 8-18 alkyl sulfates, C 8-18 alkyl sulfonates, and mixtures thereof.

Claim 21

Dependent Claim 14 words

The composition to claim 1 wherein the thickening agent is a clay thickening agent.

Claim 22

Dependent Claim 24 words

The composition of claim 20 wherein the clay thickening agent is selected from the group consisting of smectite and attapulgite clays and mixtures thereof.

Claim 23

Dependent Claim 20 words

The composition of claim 21 wherein the clay thickening agent comprises from about 0.5% to about 2% of the composition.

Claim 24

Dependent Claim 25 words

A method for inhibiting silver tarnishing of dishware in an automatic dishwashing process comprising contacting the silver with washwater containing the composition of claim 1.

Claim 25

Dependent Claim 227 words

A liquid automatic dishwashing detergent composition comprising: (a) from about 15% to about 30% of sodium tripolyphosphate; (b) from about 4% to about 10% of sodium silicate; (c) from about 3% to about 10% of sodium carbonate; (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine; (e) from about 0.1% to about 1.5% of ##STR13## having a molecular weight of about 1900, wherein PO is propylene oxide, EO is ethylene oxide and the ratio of PO to EO is from about 4:1 to about 5:1; (f) from about 0.2% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof; (g) from about 0.15% to about 1% of an ethoxylated alkyl ester of phosphoric acid having an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4; (h) from about 0.05% to about 0.2% of lithium hydroxystearate to inhibit tarnishing in silverware; and (i) the balance being water and minor ingredients; said liquid detergent containing no clay suspension agents and having a yield value of from about 100 to about 250.

Claim 26

Dependent Claim 227 words

A liquid automatic dishwashing detergent composition comprising: (a) from about 15% to about 30% of sodium tripolyphosphate; (b) from about 4% to about 10% of sodium silicate; (c) from about 3% to about 10% of sodium carbonate; (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine; (e) from about 0.1% to about 1.5% of ##STR13## having a molecular weight of about 1900, wherein PO is propylene oxide, EO is ethylene oxide and the ratio of PO to EO is from about 4:1 to about 5:1; (f) from about 0.2% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof; (g) from about 0.15% to about 1% of an ethoxylated alkyl ester of phosphoric acid having an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4; (h) from about 0.05% to about 0.2% of lithium hydroxystearate to inhibit tarnishing in silverware; and (i) the balance being water and minor ingredients; said liquid detergent containing no clay suspension agents and having a yield value of from about 100 to about 250.

Claim 27

Dependent Claim 25 words

A method for inhibiting silver tarnishing of dishware in an automatic dishwashing process comprising contacting the silver with washwater containing the composition of claim 24.

Claim 28

Dependent Claim 200 words

A liquid automatic dishwashing detergent composition comprising: (a) from about 15% to about 30% of sodium tripolyphosphate; (b) from about 4% to about 10% of sodium silicate; (c) from about 3% to about 10% of sodium carbonate; (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine; (e) from about 0.1% to about 1.5% of sodium n-decyl diphenyloxide disulfonate; (f) from about 0.2% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof; (g) from about 0.15% to about 1% of an ethoxylated alkyl ester of phosphoric acid having an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4; (h) from about 0.05% to about 0.2% of lithium hydroxystearate to inhibit tarnishing in silverware; and (i) the balance being water and minor ingredients; said liquid detergent containing no clay suspension agents and having a yield value of from about 100 to about 250.

Claim 29

Dependent Claim 200 words

A liquid automatic dishwashing detergent composition comprising: (a) from about 15% to about 30% of sodium tripolyphosphate; (b) from about 4% to about 10% of sodium silicate; (c) from about 3% to about 10% of sodium carbonate; (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine; (e) from about 0.1% to about 1.5% of sodium n-decyl diphenyloxide disulfonate; (f) from about 0.2% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof; (g) from about 0.15% to about 1% of an ethoxylated alkyl ester of phosphoric acid having an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4; (h) from about 0.05% to about 0.2% of lithium hydroxystearate to inhibit tarnishing in silverware; and (i) the balance being water and minor ingredients; said liquid detergent containing no clay suspension agents and having a yield value of from about 100 to about 250.

Claim 30

Dependent Claim 25 words

A method for inhibiting silver tarnishing of dishware in an automatic dishwashing process comprising contacting the silver with washwater containing the composition of claim 26.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-08-21	1993-02-20	1993-08-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-08-21	1997-02-20	1997-08-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-08-21	2001-02-20	2001-08-22	$7700.00	Window Closed / Lapsed

Liquid automatic dishwashing compositions containing metal salts of hydroxy fatty acids providing silver protection

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag