EP0427316A2
Expired / Lapsed
EP
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Individualized, polycarboxylic acid crosslinked fibers
Assignee: Weyerhaeuser Co
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Filing: 1990-10-29
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Granted: —
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Expires: 2010-10-29
Abstract
Abstract Disclosed are individualized, crosslinked fibers, and process for making such fibers. The individualized, crosslinked fibers have a C₂ - C₉ polycarboxylic acid crosslinking agent reached with the fibers in the form of intrafiber crosslink bonds. Preferably, the crosslinking agent is citric acid, and preferably, between about 0.5 mole % and about 10.0 mole % of the crosslinking agent reacts to form the intrafiber crosslink bonds. The individualized, crosslinked fibers are useful in a variety of absorbent structure application.
Inventors
- 👤 Carlisle Mitchell Herron
- 👤 David James Cooper
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 16:01
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/192; D21; D21C; D21C9/00; D21C9/001; D21C9/002; D21C9/005; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/31504; Y10T428/31725; Y10T428/31736
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
Individualized, crosslinked cellulosic fibers, said fibers characterized in that it comprises cellulosic fibers in substantially individual form having an effective amount of a C₂ - C₉ polycarboxylic acid crosslinking agent reacted with said fibers in intrafiber crosslink bond form, wherein said C₂ - C₉ polycarboxylic acid crosslinking agent is selected from: (a) aliphatic and alicyclic C₂ - C₉ polycarboxylic acids either olefinically saturated or unsaturated and having at least three carboxyl groups per molecule; and (b) aliphatic and alicyclic C₂ - C₉ polycarboxylic acids having two carboxyl groups per molecule and having a carbon-carbon double bond located alpha, beta to one or both of the carboxylgroups, wherein one carboxyl group in said C₂ - C₉ polycarboxylic acid crosslinking agent is separated from a second carboxyl group by either two or three carbon atoms.
Claim 2
Dependent Claim
133 words
Individualized, crosslinked cellulosic fibers, said fibers characterized in that it comprises cellulosic fibers in substantially individual form having an effective amount of a C₂ - C₉ polycarboxylic acid crosslinking agent reacted with said fibers in intrafiber crosslink bond form, wherein said C₂ - C₉ polycarboxylic acid crosslinking agent is selected from: (a) aliphatic and alicyclic C₂ - C₉ polycarboxylic acids either olefinically saturated or unsaturated and having at least three carboxyl groups per molecule; and (b) aliphatic and alicyclic C₂ - C₉ polycarboxylic acids having two carboxyl groups per molecule and having a carbon-carbon double bond located alpha, beta to one or both of the carboxylgroups, wherein one carboxyl group in said C₂ - C₉ polycarboxylic acid crosslinking agent is separated from a second carboxyl group by either two or three carbon atoms.
Claim 3
Dependent Claim
45 words
The individualized, crosslinked fibers of Claim 1 wherein said fibers have between 0.5 mole % and 10.0 mole preferably between 1.5 mole % and 6.0 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, reacted therewith in the form of intrafiber crosslink bonds.
Claim 4
Dependent Claim
40 words
The individualized fibers of Claim 2 wherein said crosslinking agent is sufficiently reacted with said fibers in intrafiber bond form to cause said fibers to have a water retention value of from 28 to 60, preferably from 30 to 45.
Claim 5
Dependent Claim
30 words
The individualized, crosslinked fibers of any of Claims 1-3 wherein said crosslinking agent is selected from citric acid, 1,2,3,4 butane tetracarboxylic acid, and 1,2,3 propane tricarboxylic acid, preferably citric acid.
Claim 6
Dependent Claim
34 words
The individualized, crosslinked fibers of any of Claim 1-3 wherein said crosslinking agent is selected from oxydisuccinic acid, tartrate monosuccinic acid having the formula and tartrate disuccinic acid having the formula preferably oxydisuccinic acid.
References Cited (Backward Citations)
No citation records indexed.
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