EP0342919A2
Expired / Lapsed
EP
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Absorbent products and their manufacture
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1989-05-16
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Granted: —
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Expires: 2009-05-16
Abstract
Abstract Film or fibre is made from a polymer of water soluble ethylenically unsaturated monomeric material that includes ionic monomer by extrusion and stretching, and a counterionic lubricant compound is absorbed into the surface of the fibre or film before or during the stretching. The counterionic lubricant compound is also of use for providing a lubricated film on other extruded or comminuted elements of water swellable or water soluble polymeric material.
Inventors
- 👤 David Farrar
- 👤 Adrian Allen
- 👤 Peter Flesher
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 06:42
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M13/00; D06M13/322; D06M13/325; D06M13/342; D06M13/46; D06M13/463; D06M7/00; D06M2101/00; D06M2101/16; D06M2101/18; D06M2200/00; D06M2200/40; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2971; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
42 words
A dried extruded or comminuted element of water swellable or water soluble polymeric material formed from water soluble ethylenically unsaturated monomeric material comprising ionic monomer characterised in that a counterionic lubricant compound has been absorbed on to the surface of the element.
Claim 2
Dependent Claim
42 words
A dried extruded or comminuted element of water swellable or water soluble polymeric material formed from water soluble ethylenically unsaturated monomeric material comprising ionic monomer characterised in that a counterionic lubricant compound has been absorbed on to the surface of the element.
Claim 3
Dependent Claim
24 words
An element according to claim 1 in which the lubricant compound includes at least one hydrophobic hydrocarbon group of at least 8 carbon atoms.
Claim 4
Dependent Claim
20 words
An element according to claim 1 in which the polymer is anionic and the lubricant compound is a cationic compound.
Claim 5
Dependent Claim
33 words
An element according to claim 3 in which the lubricant compound is a quaternary ammonium compound having at least one hydrophobic hydrocarbon group of at least 8 carbon atoms on the quaternary nitrogen.
Claim 6
Dependent Claim
23 words
An element according to claim 3 in which the lubricant compound is a di-C₁₄₋₂₀-aliphatic-di-C₁₋₄-alkyl quaternary ammonium compound or an amphoteric fatty quaternary compound.
Claim 7
Dependent Claim
16 words
An element according to claim 3 in which the lubricant is di-hydrogenated tallow dimethyl ammonium chloride.
Claim 8
Dependent Claim
34 words
An element according to any of claims 3 to 6 in which the polymer is formed from 50 to 100% by weight ethylenically unsaturated carboxylic monomer and 0 to 50% ethylenically unsaturated non-ionic monomer.
Claim 9
Dependent Claim
23 words
An element according to claim 7 in which the polymer is a copolymer of (meth) acrylic acid or maleic acid with insoluble monomer.
Claim 10
Dependent Claim
49 words
An element according to claim 7 in which the copolymer is formed from at least 50% by weight (meth) acrylic acid, 0 to 15% by weight hydroxyl alkyl (meth) acrylate and 2 to 50% by weight of a plasticising monomer selected from alkyl (meth) acrylates, styrene and vinyl esters.
Claim 11
Dependent Claim
42 words
An element according to any preceding claim and which is an extruded film or fibre that has been stretched and that is formed of water swellable polymeric material having a gel capacity of at least 50 grams deionised water per gram polymer.
Claim 12
Dependent Claim
84 words
An element according to claim 10 in which the fibre or film has been made by extruding into a gaseous atmosphere a solution in a solvent of a substantially linear polymeric material formed from water soluble ethylenically unsaturated monomeric material comprising ionic monomer and thereby evaporating the solvent and forming polymeric fibre or film, stretching the fibre or film, applying a solution of the lubricant compound to the fibre or film before or during the stretching, and cross linking the stretched fibre or film.
Claim 13
Dependent Claim
60 words
An element according to claim 11 that is fibre or film made by extrusion into warm air of an aqueous solution of linear polymeric material made by aqueous solution polymerisation of monomeric material comprising ethylenically unsaturated carboxylic monomer, and the cross linking is by reaction between carboxylic groups in the polymer and amide, epoxy or hydroxyl groups in the polymer.
Claim 14
Dependent Claim
33 words
An element according to any of claims 10 to 12 and which is a fibre in which the cross linking is by reaction between carboxylic groups and hydroxy alkyl groups in the polymer.
Claim 15
Dependent Claim
50 words
An element according to any of claims 1 to 9 and which is a comminuted particle made by bulk gel polymerisation of water swellable or water soluble polymeric material followed by comminution and drying of the gel, and in which the lubricant has been added before or during the comminution.
References Cited (Backward Citations)
No citation records indexed.
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