US4447570A
Expired / Lapsed
US
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Binder compositions for making nonwoven fabrics having good hydrophobic rewet properties
Assignee: Air Products and Chemicals Inc
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Filing: 1982-03-01
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Granted: 1984-05-08
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Expires: 2002-03-01
Abstract
Abstract A binder composition for nonwoven fabrics which comprises (a) a fugitive base salt of a phosphate ester surfactant or a carboxylate surfactant, (b) a latex comprising a vinyl acetate-ethylene-olefinically unsaturated carboxylic acid interpolymer colloidally suspended in water, the interpolymer containing about 0.5 to 7.0 weight percent olefinically unsaturated carboxylic acid and sufficient ethylene to provide the interpolymer with a glass transition temperature of from about -30° to +20° C., and (c) a polyvalent metal complex compound comprising a polyvalent metal ion and counter ions or ligands which hinder interaction of the polyvalent metal ion with the carboxylate and phosphate groups of the surfactant and interpolymer at room temperature, but at elevated temperature permit such interaction because the counter ions or ligands are expelled or are replaced by the anionic group of the surfactant and interpolymer. Nonwoven fabrics, particularly diaper innerliners, bonded with such binder compositions possess good dry and wet tensile strengths and good low rewet properties.
Inventors
- 👤 Gerald R. Cook
- 👤 John G. Iacoviello
- 👤 Robert K. Pinschmidt, Jr.
- 👤 George Davidowich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/48; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/671
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
81 words
A binder composition for nonwoven fabrics which comprises (a) an anionic immobilizable surfactant which is a phosphate ester surfactant or a free carboxylic acid group containing surfactant, (b) a latex comprising a vinyl acetate-ethylene-olefinically unsaturated carboxylic acid interpolymer colloidally suspended in water, the interpolymer containing about 0.5 to 7.0 weight percent olefinically unsaturated carboxylic acid and sufficient ethylene to provide the interpolymer with a glass transition temperature of from about -30° to +20° C., and (c) a polyvalent metal complex compound.
Claim 2
Dependent Claim
81 words
A binder composition for nonwoven fabrics which comprises (a) an anionic immobilizable surfactant which is a phosphate ester surfactant or a free carboxylic acid group containing surfactant, (b) a latex comprising a vinyl acetate-ethylene-olefinically unsaturated carboxylic acid interpolymer colloidally suspended in water, the interpolymer containing about 0.5 to 7.0 weight percent olefinically unsaturated carboxylic acid and sufficient ethylene to provide the interpolymer with a glass transition temperature of from about -30° to +20° C., and (c) a polyvalent metal complex compound.
Claim 3
Dependent Claim
28 words
A nonwoven fabric formed from a nonwoven web of fibers bonded together by a binder deposited by saturating the web of fibers with the composition of claim 1.
Claim 4
Dependent Claim
21 words
A method for preparing a nonwoven fabric which comprises saturating a nonwoven web of fibers with the composition of claim 1.
Claim 5
Dependent Claim
22 words
The invention of claim 1 wherein at least a portion of the surfactant is present in the preparation of the interpolymer latex.
Claim 6
Dependent Claim
20 words
The invention of claim 4 wherein substantially all of the surfactant is present in the preparation of the interpolymer latex.
Claim 7
Dependent Claim
16 words
The invention of claim 1 wherein the olefinically unsaturated carboxylic acid is an alpha,beta-unsaturated carboxylic acid.
Claim 8
Dependent Claim
17 words
The invention of claim 6 wherein the alpha,beta unsaturated carboxylic acid is acrylic acid or crotonic acid.
Claim 9
Dependent Claim
21 words
The invention of claim 7 wherein the alpha,beta unsaturated carboxylic acid is about 1 to 5 weight percent of the interpolymer.
Claim 10
Dependent Claim
14 words
The invention of clam 8 wherein the alpha,beta unsaturated carboxylic acid is acrylic acid.
Claim 11
Dependent Claim
14 words
The invention of clam 8 wherein the alpha,beta unsaturated carboxylic acid is acrylic acid.
Claim 12
Dependent Claim
26 words
The invention of claim 6 wherein the interpolymer contains sufficient ethylene to provide it with a glass transition temperature of from about -5° to +15° C.
Claim 13
Dependent Claim
21 words
The invention of claim 1 wherein the surfactant is present at about 0.5 to 6 weight percent of the latex solids.
Claim 14
Dependent Claim
15 words
The invention of claims 1 or 2 wherein the surfactant is a phosphate ester surfactant.
Claim 15
Dependent Claim
18 words
The invention of claim 12 wherein the phosphate ester surfactant is a phosphate ester of a poly(oxyalkylene) alcohol.
Claim 16
Dependent Claim
21 words
The invention of claim 12 wherein the phosphate ester surfactant is a phosphate ester of an alkyl or alkylaryl poly(oxyalkylene) alcohol.
Claim 17
Dependent Claim
21 words
The invention of claim 12 wherein the phosphate ester surfactant is a phosphate ester of an alkyl or alkylaryl poly(oxyethylene) ethanol.
Claim 18
Dependent Claim
18 words
The invention of claim 12 wherein the phosphate ester surfactant is a phosphate ester of tridecyl poly(oxyethylene) ethanol.
Claim 19
Dependent Claim
18 words
The invention of claim 12 wherein the phosphate ester surfactant is a phosphate ester of nonylphenyl poly(oxyethylene) ethanol.
Claim 20
Dependent Claim
15 words
The invention of claim 15 wherein the surfactant has about 3 to 10 oxyethylene units.
Claim 21
Dependent Claim
15 words
The invention of claim 18 wherein the surfactant has about 4 or 5 oxyethylene units.
Claim 22
Dependent Claim
15 words
The invention of claims 1 or 2 wherein the surfactant is a sulfoalkanedioic acid half-ester.
Claim 23
Dependent Claim
13 words
The invention of claim 20 wherein the surfactant is a sulfosuccinic acid half-ester.
Claim 24
Dependent Claim
17 words
The invention of claim 21 wherein the surfactant is an alkyl or alkylaryl polyethoxy sulfosuccinic acid half-ester.
Claim 25
Dependent Claim
21 words
The invention of claim 22 wherein the surfactant is an ethoxylated C 10 to C 12 alcohol half-ester of sulfosuccinic acid.
Claim 26
Dependent Claim
11 words
The invention of claim 1 wherein the polyvalent metal is aluminum.
Claim 27
Dependent Claim
11 words
The invention of claim 1 wherein the polyvalent metal is zirconium.
Claim 28
Dependent Claim
15 words
The invention of claim 12 wherein the phosphate ester surfactant is a fugitive base salt.
Claim 29
Dependent Claim
14 words
The invention of claim 26 wherein the fugitive base salt is an ammonium salt.
Claim 30
Dependent Claim
128 words
A binder composition for nonwoven fabrics which comprises (a) a latex comprising a vinyl acetate-ethylene-alpha,beta unsaturated carboxylic acid interpolymer colloidally suspended in water, the interpolymer containing about 60 to 95 weight percent vinyl acetate, about 0.5 to 7.0 weight percent of an alpha,beta unsaturated carboxylic acid which is acrylic acid or crotonic acid and sufficient ethylene to provide the interpolymer with a glass transition temperature of from about -30° to +20° C., (b) an anionic phosphate ester or sulfoalkanedioic acid half-ester surfactant, the surfactant present at about 0.5 to 6 weight percent of the latex solids, at least a portion of the surfactant present in the polymerization reaction for preparing the latex, and (c) a polyvalent metal complex compound in which the polyvalent metal is aluminum or zirconium.
Claim 31
Dependent Claim
128 words
A binder composition for nonwoven fabrics which comprises (a) a latex comprising a vinyl acetate-ethylene-alpha,beta unsaturated carboxylic acid interpolymer colloidally suspended in water, the interpolymer containing about 60 to 95 weight percent vinyl acetate, about 0.5 to 7.0 weight percent of an alpha,beta unsaturated carboxylic acid which is acrylic acid or crotonic acid and sufficient ethylene to provide the interpolymer with a glass transition temperature of from about -30° to +20° C., (b) an anionic phosphate ester or sulfoalkanedioic acid half-ester surfactant, the surfactant present at about 0.5 to 6 weight percent of the latex solids, at least a portion of the surfactant present in the polymerization reaction for preparing the latex, and (c) a polyvalent metal complex compound in which the polyvalent metal is aluminum or zirconium.
Claim 32
Dependent Claim
18 words
The invention of claim 28 wherein the surfactant is a fugitive base salt of a phosphate ester surfactant.
Claim 33
Dependent Claim
14 words
The invention of claim 29 wherein the fugitive base salt is an ammonium salt.
Claim 34
Dependent Claim
27 words
A nonwoven fabric comprising a web of nonwoven fibers bonded together with a binder deposited by saturating the web of fibers with the composition of claim 28.
Claim 35
Dependent Claim
18 words
The invention of claims 2 or 31 wherein the nonwoven fabric is an innerliner for a disposable diaper.
Claim 36
Dependent Claim
9 words
A disposable diaper containing the innerliner of claim 32.
Claim 37
Dependent Claim
45 words
A nonwoven fabric bonded by overall impregnation of a nonwoven web of fibers with a binder emulsion containing a sulfoalkanedioic acid half-ester surfactant or a fugitive base salt of a phosphate ester surfactant, an interpolymer containing carboxylic acid units and a polyvalent metal complex compound.
Claim 38
Dependent Claim
45 words
A nonwoven fabric bonded by overall impregnation of a nonwoven web of fibers with a binder emulsion containing a sulfoalkanedioic acid half-ester surfactant or a fugitive base salt of a phosphate ester surfactant, an interpolymer containing carboxylic acid units and a polyvalent metal complex compound.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |