US5213588A — Abrasive wiping articles and a process for prepar…

Claim 1

Independent Claim 206 words

An abrasive wiping article for cleaning hard surfaces, said article comprising an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100 g/m 2 , onto at least one surface of which substrate is printed a pattern of an abrasively effective amount of a cured liquid scrubbing bead mixture which, prior to curing, has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm and which comprises A) from about 30% to 70% by weight of total solids of carboxylated, ionically charged, polymeric abrasive particles ranging in particle size from about 20 to 400 microns and having a Knoop hardness of from about 4 to 25; B) from about 30% to 70% by weight of total solids of a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and C) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from i) monomeric mono -, di - and triamines; and ii) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids.

Claim 2

Dependent Claim 206 words

An abrasive wiping article for cleaning hard surfaces, said article comprising an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100 g/m 2 , onto at least one surface of which substrate is printed a pattern of an abrasively effective amount of a cured liquid scrubbing bead mixture which, prior to curing, has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm and which comprises A) from about 30% to 70% by weight of total solids of carboxylated, ionically charged, polymeric abrasive particles ranging in particle size from about 20 to 400 microns and having a Knoop hardness of from about 4 to 25; B) from about 30% to 70% by weight of total solids of a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and C) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from i) monomeric mono -, di - and triamines; and ii) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids.

Claim 3

Dependent Claim 133 words

An article according to claim 1 wherein A) the liquid scrubbing bead mixture, prior to curing, has a viscosity of from about 150 to 800 centipoise and a surface tension value of from about 26 to 30 dynes/cm.; B) the polymeric abrasive particles comprise from about 40% to 60% by weight of the total solids in the scrubbing bead mixture, range in particle size from about 100 to 300 microns and range in Knoop hardness from about 15 to 22; C) the polymeric adhesive material comprises from about 40% to 60% by weight of the total solids in the scrubbing bead mixture and has, upon curing, a Knoop hardness of from about 0.5 to 12; and D) the amino-epichlorohydrin cross-linking agent comprises from about 4% to 8% by weight of the polymeric adhesive.

Claim 4

Dependent Claim 37 words

An article according to claim 1 wherein the scrubbing bead mixture is printed onto a paper substrate in an amount which provides from about 1.5 to 10 grams of abrasive particles per square meter of substrate surface.

Claim 5

Dependent Claim 109 words

An article according to claim 3 wherein A) the polymeric abrasive particles comprise carboxylated polymethyl methacrylate or carboxylated styrene-butadiene and have an Acid Number of from about 3 to 50; B) the polymeric adhesive is an acrylic emulsion latex or blend of such latexes having, upon curing, a Knoop hardness of from about 8 to 15; C) the amine reactant used to prepare the amino-epichlorohydrin cross-linking agent comprises a polyamide-polyamine derived from a polyethylene polyamine having from 2 to 4 ethylene groups and from a C 4 -C 6 saturated aliphatic dicarboxylic acid; and D) the scrubbing bead mixture has a viscosity of from about 200 to 600 centipoise.

Claim 6

Dependent Claim 22 words

An article according to claim 4 wherein the amino-epichlorohydrin cross-linking agent is prepared from a polyamide-polyamine derived from diethylenetriamine and adipic acid.

Claim 7

Dependent Claim 121 words

An abrasive wiping article for cleaning hard surfaces, said article comprising an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100 g/m 2 , said substrate having affixed thereto an abrasively effective amount of polymeric abrasive particles which range in particle size from about 100 to 300 microns and which have a Knoop hardness ranging from about 4 to 25; a substantial portion of said particles having a plurality of angular cutting edges on the surfaces thereof; said particles further being affixed to said nonwoven substrate in a manner such that the average dimension of the exposed portion of said abrasive particles which extends perpendicularly from the substrate surface ranges from about 40 to 300 microns.

Claim 8

Dependent Claim 121 words

An abrasive wiping article for cleaning hard surfaces, said article comprising an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100 g/m 2 , said substrate having affixed thereto an abrasively effective amount of polymeric abrasive particles which range in particle size from about 100 to 300 microns and which have a Knoop hardness ranging from about 4 to 25; a substantial portion of said particles having a plurality of angular cutting edges on the surfaces thereof; said particles further being affixed to said nonwoven substrate in a manner such that the average dimension of the exposed portion of said abrasive particles which extends perpendicularly from the substrate surface ranges from about 40 to 300 microns.

Claim 9

Dependent Claim 30 words

An article according to claim 6 wherein the nonwoven substrate is paper and the weight ratio of the abrasive particles to the paper substrate ranges from about 1.5:100 to 2:3.

Claim 10

Dependent Claim 77 words

An article according to claim 7 wherein the abrasive particles are affixed to the paper substrate by means of an adhesive-crosslinker combination which comprises A) a carboxyl group-containing polymeric adhesive material. having, upon curing, a Knoop hardness of from about 8 to 15; and B) an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is a polyamide-polyamine derived from a polyalkylene polyamine and a C 3 -C 10 dibasic carboxylic acid.

Claim 11

Dependent Claim 33 words

An article according to claim 8 wherein the abrasive particles are affixed to one side of said substrate and cover from about 20 to 70% of the surface area of that one side.

Claim 12

Dependent Claim 32 words

An article according to claim 9 wherein the average dimension of the exposed portion of the abrasive particles which extends perpendicularly from the substrate surface ranges from about 75 to 250 microns.

Claim 13

Dependent Claim 33 words

An article according to claim 10 wherein the abrasive particles comprise carboxylated polymethyl methacrylate having an Acid Number of from about 8 to 37 and range in Knoop hardness from 15 to 22.

Claim 14

Dependent Claim 36 words

An article according to claim 11 wherein the cross-linking agent comprises from about 4% to 8% by weight of the polymeric adhesive in the adhesive-crosslinker combination used to affix the abrasive particles to the paper substrate.

Claim 15

Dependent Claim 248 words

A process for preparing an abrasive wiping article for cleaning hard surfaces, which process comprises A) printing onto at least one surface of an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100g/m 2 , an abrasively effective amount of a liquid scrubbing bead mixture which has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm, and which comprises i) from about 30% to 70% by weight of total solids of carboxylated, ionically charged, polymeric abrasive particles ranging in particle size from about 20 to 400 microns and having a Knoop hardness of from about 4 to 25; ii) from about 30% to 70% by weight of total solids of a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and iii) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from a) monomeric mono -, di - and triamines; and b) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids; B) drying said printed substrate to a consistency of at least about 90%; and C) maintaining said printed substrate under curing conditions of time and temperature which are sufficient to promote formation of cross-linking covalent bonds between an within the chemically reactive components of the scrubbing bead mixture.

Claim 16

Dependent Claim 248 words

A process for preparing an abrasive wiping article for cleaning hard surfaces, which process comprises A) printing onto at least one surface of an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100g/m 2 , an abrasively effective amount of a liquid scrubbing bead mixture which has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm, and which comprises i) from about 30% to 70% by weight of total solids of carboxylated, ionically charged, polymeric abrasive particles ranging in particle size from about 20 to 400 microns and having a Knoop hardness of from about 4 to 25; ii) from about 30% to 70% by weight of total solids of a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and iii) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from a) monomeric mono -, di - and triamines; and b) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids; B) drying said printed substrate to a consistency of at least about 90%; and C) maintaining said printed substrate under curing conditions of time and temperature which are sufficient to promote formation of cross-linking covalent bonds between an within the chemically reactive components of the scrubbing bead mixture.

Claim 17

Dependent Claim 103 words

A process according to claim 13 wherein A) the polymer abrasive particles comprise from about 40% to 60% by weight of the total solids in the scrubbing bead mixture, range in particle size from about 100 to 300 microns and range in Knoop hardness from about 15 to 22 B) the polymeric adhesive material comprises from about 40 to 60% by weight of the total solids in the scrubbing bead mixture and has, upon curing, a Knoop hardness of from about 0.5 to 12; and C) the amino-epichlorohydirn cross-linking agent comprises of from about 4% to 8% by weight of the polymeric adhesive.

Claim 18

Dependent Claim 36 words

A process according to claim 13 wherein scrubbing bead mixture is printed onto a paper substrate in an amount which provides from about 1.5 to 10 grams of abrasive particles per square meter of substrate surface.

Claim 19

Dependent Claim 50 words

A process according to claim 15 wherein the scrubbing bead mixture has a viscosity ranging from about 200 to 600 centipoise and a surface tension value ranging from about 26 to 30 dynes/cm and wherein the polymeric adhesive has, upon curing, a Knoop hardness of from about 8 to 15.

Claim 20

Dependent Claim 34 words

A process according to claim 16 wherein the dried printed substrate is cured for a period of from about 7 to 30 days at a temperature of from about 15° C. to 30° C.

Claim 21

Dependent Claim 36 words

A process according to claim 15 wherein the polymeric adhesive is an acrylic emulsion latex or blend of such latexes and the amino-epichlorohydirm cross-linking agent is formed from a polyamide-polyamine derived from diethylenetriamine and adipic acid.

Claim 22

Dependent Claim 35 words

A process according to claim 18 wherein the polymeric abrasive particles are comprised of a material selected from carboxylated polymethyl methacrylate and carboxylated styrene-butadiene and have an Acid Number of from about 3 to 50.

Claim 23

Dependent Claim 35 words

A process according to claim 19 wherein the scrubbing bead mixture is printed onto one side of the paper substrate and covers from about 20% to 70% of the surface area of that one side.

Claim 24

Dependent Claim 158 words

A wiping article suitable for household cleaning applications, said article comprising an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100 g/m 2 , onto at least one surface of which substrate is printed a pattern of a tensile and burst strength enhancing amount of a cured liquid binder mixture which, prior to curing, has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm and which comprises A) a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and B) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from i) monomeric mono -, di - and triamines; and ii) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids.

Claim 25

Dependent Claim 158 words

A wiping article suitable for household cleaning applications, said article comprising an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100 g/m 2 , onto at least one surface of which substrate is printed a pattern of a tensile and burst strength enhancing amount of a cured liquid binder mixture which, prior to curing, has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm and which comprises A) a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and B) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from i) monomeric mono -, di - and triamines; and ii) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids.

Claim 26

Dependent Claim 75 words

An article according to claim 21 wherein the binder mixture is printed onto a paper substrate and wherein in the binder mixture A) the carboxyl group-containing polymeric adhesive material has, upon curing, a Knoop hardness of from about 0.5 to 12; and B) the amino-epichlorohydrin cross-linking agent comprises the reaction product of epichlorohydrin and an amine reactant which is a polyamide-polyamine derived from a polyalkylene polyamine and a C 3 -C 10 dibasic carboxylic acid.

Claim 27

Dependent Claim 75 words

An article according to claim 21 wherein in the binder mixture A) the amine reactant used to prepare the amino-epichlorohydrin cross-linking agent comprises a polyamide-polyamine derived from a polyethylene poly-amine having from 2 to 4 ethylene groups and from a C 4 -C 6 saturated aliphatic dicarboxylic acid; and B) the polymeric adhesive is an acrylic emulsion latex or blend of such latexes having, upon curing, a Knoop hardness of from about 8 to 15.

Claim 28

Dependent Claim 198 words

A process for preparing a wiping article suitable for household cleaning applications, which process comprises A) printing onto at least one surface of an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100g/m 2 , a tensile and burst strength enhancing amount of a liquid binder mixture which has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm, and which comprises i) a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and ii) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from a) monomeric mono -, di - and triamines; and b) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids; B) drying said printed substrate to a consistency of at least about 90%; and C) maintaining said printed substrate under curing conditions of time and temperature which are sufficient to promote formation of cross-linking covalent bonds between and within the chemically reactive components of the binder.

Claim 29

Dependent Claim 198 words

A process for preparing a wiping article suitable for household cleaning applications, which process comprises A) printing onto at least one surface of an absorbent nonwoven substrate having a dry basis weight of from about 30 to 100g/m 2 , a tensile and burst strength enhancing amount of a liquid binder mixture which has a viscosity of from about 70 to 2500 centipoise and a surface tension value of from about 24 to 32 dynes/cm, and which comprises i) a carboxyl group-containing polymeric adhesive material having, upon curing, a Knoop hardness of from about 0.5 to 17; and ii) from about 1% to 10% by weight of the polymeric adhesive of an amino-epichlorohydrin cross-linking agent comprising the reaction product of epichlorohydrin and an amine reactant which is selected from a) monomeric mono -, di - and triamines; and b) polyamide-polyamines derived from polyalkylene polyamines and C 3 -C 10 dibasic carboxylic acids; B) drying said printed substrate to a consistency of at least about 90%; and C) maintaining said printed substrate under curing conditions of time and temperature which are sufficient to promote formation of cross-linking covalent bonds between and within the chemically reactive components of the binder.

Claim 30

Dependent Claim 35 words

A process according to claim 24 wherein binder mixture is printed onto a paper substrate in an amount which provides from about 3 to 15 grams of polymeric adhesive per square meter of substrate surface.

Claim 31

Dependent Claim 35 words

A process according to claim 24 wherein the dried printed paper substrate is cured for a period of from about 7 to 30 days at a temperature of from about 15° C. to 30° C.

Claim 32

Dependent Claim 49 words

A process according to claim 26 wherein the polymeric adhesive is an acrylic emulsion latex or blend of such latexes having, upon curing, a Knoop hardness of from about 8 to 15, and wherein the amino-epichlorohydrin cross-linking agent is formed from a polyamide-polyamine derived from diethylenetriamine and adipic acid.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-05-24	1996-11-23	1997-05-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-05-24	2000-11-23	2001-05-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-05-24	2004-11-23	2005-05-25	$7700.00	Window Closed / Lapsed

Abrasive wiping articles and a process for preparing such articles

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