US4772290A — Liquid hydrogen peroxide/peracid precursor bleach…

Claim 1

Independent Claim 170 words

A shelf-stable low-temperature-active liquid laundry bleach composition comprising an acidic aqueous medium containing an effective bleach-producing amount of hydrogen peroxide and having dispersed therein an effective activating amount of solid peracid precursor activator having a structure selected from ##STR16## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali meteal or alkaline earth metal ion; m is 1 or 2, R 1 and R are independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20 that is neither ionized nor soluble in said acidic aqueous medium but that is soluble in alkaline laundry water.

Claim 2

Dependent Claim 170 words

A shelf-stable low-temperature-active liquid laundry bleach composition comprising an acidic aqueous medium containing an effective bleach-producing amount of hydrogen peroxide and having dispersed therein an effective activating amount of solid peracid precursor activator having a structure selected from ##STR16## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali meteal or alkaline earth metal ion; m is 1 or 2, R 1 and R are independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20 that is neither ionized nor soluble in said acidic aqueous medium but that is soluble in alkaline laundry water.

Claim 3

Dependent Claim 23 words

The bleach composition of claim 1 wherein said effective bleach-producing amount is a concentration of from about 1% to about 25% by weight.

Claim 4

Dependent Claim 22 words

The bleach composition of claim 2 wherein said acidic aqueous medium has a pH of from about 2.0 to just below 7.0.

Claim 5

Dependent Claim 193 words

A shelf-stable low-temperature-active liquid laundry bleach composition comprising an acidic aqueous medium having a pH of from about 2.0 to about 6.0 containing from about 1% to about 25% by weight of hydrogen peroxide and having dispersed therein from about 0.1 to about 10 moles per mole of hydrogen peroxide of a solid peracid precursor peroxide activator that is insoluble in said acidic aqueous medium but that is soluble in alkaline laundry water, said activator having a structure selected from ##STR17## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali metal or alkaline earth metal ion; m is 1 or 2, R 1 and R are independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20.

Claim 6

Dependent Claim 193 words

A shelf-stable low-temperature-active liquid laundry bleach composition comprising an acidic aqueous medium having a pH of from about 2.0 to about 6.0 containing from about 1% to about 25% by weight of hydrogen peroxide and having dispersed therein from about 0.1 to about 10 moles per mole of hydrogen peroxide of a solid peracid precursor peroxide activator that is insoluble in said acidic aqueous medium but that is soluble in alkaline laundry water, said activator having a structure selected from ##STR17## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali metal or alkaline earth metal ion; m is 1 or 2, R 1 and R are independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20.

Claim 7

Dependent Claim 13 words

The bleach composition of claim 4 wherein the activator has the structure ##STR18##

Claim 8

Dependent Claim 12 words

The beach composition of claim 5 wherein SG is a --COOM group.

Claim 9

Dependent Claim 10 words

The bleach composition of claim 6 wherein X is hydrogen.

Claim 10

Dependent Claim 13 words

The bleach composition of claim 7 wherein n is from 3 to 10.

Claim 11

Dependent Claim 13 words

The bleach composition of claim 8 wherein n is from 5 to 9.

Claim 12

Dependent Claim 12 words

The bleach composition of claim 1 additionally comprising one or more surfactants.

Claim 13

Dependent Claim 19 words

The bleach composition of claim 10 wherein the surfactants comprise an admixture of anhydrosorbitol ester and ethoxylated sorbitan ester.

Claim 14

Dependent Claim 11 words

The bleach composition of claim 10 additionally comprising a fabric softener.

Claim 15

Dependent Claim 200 words

A shelf-stable low-temperature-active liquid laundry bleach composition comprising an acidic aqueous medium having a pH of from about 2.0 to just below 7.0 and containing from about 1% to about 25% by weight of hydrogen peroxide and having dispersed therein solid peracid precursor peroxide activator having a structure selected from ##STR19## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali metal or alkaline earth metal ion; m is 1 or 2, R 1 and R independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20 that is insoluble in said acidic aqueous medium but that is soluble in alkaline laundry water said activator being present in an amount of from about 0.1 to about 10 moles of activator per mole of hydrogen peroxide.

Claim 16

Dependent Claim 200 words

A shelf-stable low-temperature-active liquid laundry bleach composition comprising an acidic aqueous medium having a pH of from about 2.0 to just below 7.0 and containing from about 1% to about 25% by weight of hydrogen peroxide and having dispersed therein solid peracid precursor peroxide activator having a structure selected from ##STR19## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali metal or alkaline earth metal ion; m is 1 or 2, R 1 and R independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20 that is insoluble in said acidic aqueous medium but that is soluble in alkaline laundry water said activator being present in an amount of from about 0.1 to about 10 moles of activator per mole of hydrogen peroxide.

Claim 17

Independent Claim 218 words

A method for effective low temperature bleaching of stains or soils from fabric in need of such bleaching which comprises contacting said fabric with a wash solution comprising water and an effective bleach-producing amount of a dispersion of solid particulate peracid precursor hydrogen peroxide activator having a structure selected from ##STR20## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali metal or alkaline earth metal ion; m is 1 or 2, R 1 and R are independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20 in acidic aqueous hydrogen peroxide, said wash solution having a pH of greater than 7.0 after said dispersion has been added, wherein said contcting is effected at a temperature of 10° C. to 85° C. for an effective bleaching interval and within 1 hour after said dispersion has been added to produce said wash solution.

Claim 18

Independent Claim 218 words

A method for effective low temperature bleaching of stains or soils from fabric in need of such bleaching which comprises contacting said fabric with a wash solution comprising water and an effective bleach-producing amount of a dispersion of solid particulate peracid precursor hydrogen peroxide activator having a structure selected from ##STR20## wherein X is hydrogen, lower alkyl, lower acyl, or lower alkoxy, wherein "lower" means from 1 to 4 carbon atoms, an aryl of about 6 carbon atoms, or a chloro, bromo or iodo; SG is a solublizing group selected from among --COOM, --COSH, --OH, --SH, an anhydride, a maleimide and a sulfonamide and SG' is a COOM or a COSH with M being hydrogen or an alkali metal or alkaline earth metal ion; m is 1 or 2, R 1 and R are independently selected from H and C n' H 2n'+1 , n' is an integer of from 1 to 20, and n is an integer of from 1 to 20 in acidic aqueous hydrogen peroxide, said wash solution having a pH of greater than 7.0 after said dispersion has been added, wherein said contcting is effected at a temperature of 10° C. to 85° C. for an effective bleaching interval and within 1 hour after said dispersion has been added to produce said wash solution.

Claim 19

Dependent Claim 114 words

A shelf-stable low temperature-active liquid laundry bleach composition comprising an acidic aqueous medium having a pH of from about 2.0 to just below 7.0 and containing from about 1% to about 25% by weight of hydrogen peroxide and having dispersed therein solid peracid precursor peroxide activator of the formula ##STR21## wherein M is selected from hydrogen, the alkali metal ions and the alkaline earth metal ions and n is an integer selected from 6, 7 and 8 said activator being insoluble in said acidic aqueous medium but soluble in alkaline laundry water said activator being present in an amount of from about 0.1 to about 10 moles of activator per mole of hydrogen peroxide.

Claim 20

Dependent Claim 114 words

A shelf-stable low temperature-active liquid laundry bleach composition comprising an acidic aqueous medium having a pH of from about 2.0 to just below 7.0 and containing from about 1% to about 25% by weight of hydrogen peroxide and having dispersed therein solid peracid precursor peroxide activator of the formula ##STR21## wherein M is selected from hydrogen, the alkali metal ions and the alkaline earth metal ions and n is an integer selected from 6, 7 and 8 said activator being insoluble in said acidic aqueous medium but soluble in alkaline laundry water said activator being present in an amount of from about 0.1 to about 10 moles of activator per mole of hydrogen peroxide.

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

Liquid hydrogen peroxide/peracid precursor bleach: acidic aqueous medium containing solid peracid precursor activator

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