EP0252649A2
Expired / Lapsed
EP
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Process for making individualized, cross-linked fibres
Assignee: Procter and Gamble Co
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Filing: 1987-06-24
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Granted: —
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Expires: 2007-06-24
Abstract
Abstract A process for making individualized, crosslinked fibers having low levels of residual crosslinking agent. The fibers are made by contacting the fibers with a crosslinking agent; reacting the crosslinking agent with the fibers to form intrafiber crosslink bonds in the substantial absence of interfiber bonds; and washing the fibers with an alkaline solution.
Inventors
- 👤 Carlisle Mitchell Herron
- 👤 Walter Lee Dean
- 👤 Danny Raymond Moore
- 👤 James William Owens
- 👤 Howard Leon Schoggen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:47
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A process for making individualized, crosslinked, fibers characterized in that said process comprises the steps of: a) providing cellulosic fibers and contacting said fibers with a crosslinking agent; b) reacting said crosslinking agent with said fibers to form intrafiber crosslink bonds in the substantial absence of interfiber bonds; and c) washing such fibers with an alkaline solution.
Claim 2
Dependent Claim
57 words
A process for making individualized, crosslinked, fibers characterized in that said process comprises the steps of: a) providing cellulosic fibers and contacting said fibers with a crosslinking agent; b) reacting said crosslinking agent with said fibers to form intrafiber crosslink bonds in the substantial absence of interfiber bonds; and c) washing such fibers with an alkaline solution.
Claim 3
Dependent Claim
19 words
A process according to Claim 1, characterized in that said alkaline solution has a pH greater than pH 9.
Claim 4
Dependent Claim
41 words
A process according to either one of Claims 1 & 2, characterized in that said crosslinking agent is selected from C₂-C₈ dialdehydes, C₂-C₈ dialdehyde acid analogues containing at least one aldehyde group, and oligomers of said dialdehydes and dialdehyde acid analogues.
Claim 5
Dependent Claim
56 words
A process according to Claim 3, characterized in that said fibers are contacted with a sufficient amount of crosslinking agent such that between 0.5 mole % and 3.5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, are reacted with said fibers and said fibers have a water retention value of less than 60.
Claim 6
Dependent Claim
44 words
A process according to Claim 4, characterized in that said fibers are contacted with a sufficient amount of crosslinking agent such that between 0.5 mole % and 2.5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, are reacted with said fibers.
Claim 7
Dependent Claim
31 words
A process according to any one of Claims 1-5, characterized in that said cellulosic fibers of step a), are partially bleached by at least one stage of a multi-stage bleaching sequence.
Claim 8
Dependent Claim
33 words
A process according to any one of Claims 1-6, characterized in that said alkaline solution comprises an aqueous medium and a compound selected from sodium hypochlorite, ammonium hydroxide, hydrogen peroxide, and sodium bisulfite.
References Cited (Backward Citations)
No citation records indexed.
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