New polymer particles which are useful for absorption of aqueous fluids
Polymer particles which absorb water, aqueous fluids and serous fluids are claimed. The polymers comprise hydrogel polymers which contain carboxylate groups. The particles are crosslinked on the surface in the powder state. The particles may be prepared (i) by coating with at least one polyalkylene...
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| creator | BREITBACH, LUDGER., 47269 DUISBURG, DE MERTENS, RICHARD., 47803 KREFELD, DE |
| description | Polymer particles which absorb water, aqueous fluids and serous fluids are claimed. The polymers comprise hydrogel polymers which contain carboxylate groups. The particles are crosslinked on the surface in the powder state. The particles may be prepared (i) by coating with at least one polyalkylene glycol in the hydrogel state, and (ii) with a surface crosslinker which is free of polyalkylene glycol. Also claimed is the preparation of particles (as described above) comprising: (a) moistening (at least partially) particles of a hydrogel of a water-absorbing polymer with at least one polyalkylene glycol, in direct form or in the form of a solution; (b) drying the mixture of polymer and polyalkylene glycol under conditions such that a powdery, flowable state is achieved; (c) optionally reducing the particle size of the dried, coated absorbent polymer, using mechanical means; (d) coating the dried particles of water-absorbent polymer with a surface crosslinker, in direct form of in the form of a solution; and (e) heating the coated, water-absorbent particles under conditions such that the surface crosslinker and carboxyl groups of the water-absorbent polymer react, resulting in crosslinking of the surface. |
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The polymers comprise hydrogel polymers which contain carboxylate groups. The particles are crosslinked on the surface in the powder state. The particles may be prepared (i) by coating with at least one polyalkylene glycol in the hydrogel state, and (ii) with a surface crosslinker which is free of polyalkylene glycol. Also claimed is the preparation of particles (as described above) comprising: (a) moistening (at least partially) particles of a hydrogel of a water-absorbing polymer with at least one polyalkylene glycol, in direct form or in the form of a solution; (b) drying the mixture of polymer and polyalkylene glycol under conditions such that a powdery, flowable state is achieved; (c) optionally reducing the particle size of the dried, coated absorbent polymer, using mechanical means; (d) coating the dried particles of water-absorbent polymer with a surface crosslinker, in direct form of in the form of a solution; and (e) heating the coated, water-absorbent particles under conditions such that the surface crosslinker and carboxyl groups of the water-absorbent polymer react, resulting in crosslinking of the surface.</description><edition>6</edition><language>eng ; ger</language><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G ; BANDAGES, DRESSINGS OR ABSORBENT PADS ; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES ; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. 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The polymers comprise hydrogel polymers which contain carboxylate groups. The particles are crosslinked on the surface in the powder state. The particles may be prepared (i) by coating with at least one polyalkylene glycol in the hydrogel state, and (ii) with a surface crosslinker which is free of polyalkylene glycol. Also claimed is the preparation of particles (as described above) comprising: (a) moistening (at least partially) particles of a hydrogel of a water-absorbing polymer with at least one polyalkylene glycol, in direct form or in the form of a solution; (b) drying the mixture of polymer and polyalkylene glycol under conditions such that a powdery, flowable state is achieved; (c) optionally reducing the particle size of the dried, coated absorbent polymer, using mechanical means; (d) coating the dried particles of water-absorbent polymer with a surface crosslinker, in direct form of in the form of a solution; and (e) heating the coated, water-absorbent particles under conditions such that the surface crosslinker and carboxyl groups of the water-absorbent polymer react, resulting in crosslinking of the surface.</description><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</subject><subject>BANDAGES, DRESSINGS OR ABSORBENT PADS</subject><subject>CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES</subject><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>COMPOSITIONS OF MACROMOLECULAR COMPOUNDS</subject><subject>DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS</subject><subject>DISINFECTION, STERILISATION, OR DEODORISATION OF AIR</subject><subject>FERTILISERS</subject><subject>FERTILISERS CHARACTERISED BY THEIR FORM</subject><subject>FILTERS IMPLANTABLE INTO BLOOD VESSELS</subject><subject>FIRST-AID KITS</subject><subject>FOMENTATION</subject><subject>GENERAL PROCESSES OF COMPOUNDING</subject><subject>HUMAN NECESSITIES</subject><subject>HYGIENE</subject><subject>MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS</subject><subject>MANUFACTURE THEREOF</subject><subject>MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES</subject><subject>MEDICAL OR VETERINARY SCIENCE</subject><subject>METALLURGY</subject><subject>METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL</subject><subject>MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05</subject><subject>MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>PROSTHESES</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><subject>THEIR RELEVANT APPARATUS</subject><subject>TRANSPORTING</subject><subject>TREATMENT OR PROTECTION OF EYES OR EARS</subject><subject>WORKING-UP</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1998</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNyjEOwjAMBdAsDAi4gzkAQ5UOMKJSYGJir0z4USOFOsSJKm7PwgGY3vKW5nLDTEni54VMiXMJLkJpHoMbiTOoKnyN5CUTP1RyKkEmEk_8rpCq5GMNT12bheeo2Pxcme25v3fXHZIM0MQOE8pw6pvDvrFta4-N_ed8AYNlNCE</recordid><startdate>19981008</startdate><enddate>19981008</enddate><creator>BREITBACH, LUDGER., 47269 DUISBURG, DE</creator><creator>MERTENS, RICHARD., 47803 KREFELD, DE</creator><scope>EVB</scope></search><sort><creationdate>19981008</creationdate><title>New polymer particles which are useful for absorption of aqueous fluids</title><author>BREITBACH, LUDGER., 47269 DUISBURG, DE ; MERTENS, RICHARD., 47803 KREFELD, DE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_DE19813443A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; ger</language><creationdate>1998</creationdate><topic>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</topic><topic>BANDAGES, DRESSINGS OR ABSORBENT PADS</topic><topic>CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES</topic><topic>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>COMPOSITIONS OF MACROMOLECULAR COMPOUNDS</topic><topic>DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS</topic><topic>DISINFECTION, STERILISATION, OR DEODORISATION OF AIR</topic><topic>FERTILISERS</topic><topic>FERTILISERS CHARACTERISED BY THEIR FORM</topic><topic>FILTERS IMPLANTABLE INTO BLOOD VESSELS</topic><topic>FIRST-AID KITS</topic><topic>FOMENTATION</topic><topic>GENERAL PROCESSES OF COMPOUNDING</topic><topic>HUMAN NECESSITIES</topic><topic>HYGIENE</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS</topic><topic>MANUFACTURE THEREOF</topic><topic>MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES</topic><topic>MEDICAL OR VETERINARY SCIENCE</topic><topic>METALLURGY</topic><topic>METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL</topic><topic>MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05</topic><topic>MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>PROSTHESES</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><topic>THEIR RELEVANT APPARATUS</topic><topic>TRANSPORTING</topic><topic>TREATMENT OR PROTECTION OF EYES OR EARS</topic><topic>WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>BREITBACH, LUDGER., 47269 DUISBURG, DE</creatorcontrib><creatorcontrib>MERTENS, RICHARD., 47803 KREFELD, DE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>BREITBACH, LUDGER., 47269 DUISBURG, DE</au><au>MERTENS, RICHARD., 47803 KREFELD, DE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>New polymer particles which are useful for absorption of aqueous fluids</title><date>1998-10-08</date><risdate>1998</risdate><abstract>Polymer particles which absorb water, aqueous fluids and serous fluids are claimed. The polymers comprise hydrogel polymers which contain carboxylate groups. The particles are crosslinked on the surface in the powder state. The particles may be prepared (i) by coating with at least one polyalkylene glycol in the hydrogel state, and (ii) with a surface crosslinker which is free of polyalkylene glycol. Also claimed is the preparation of particles (as described above) comprising: (a) moistening (at least partially) particles of a hydrogel of a water-absorbing polymer with at least one polyalkylene glycol, in direct form or in the form of a solution; (b) drying the mixture of polymer and polyalkylene glycol under conditions such that a powdery, flowable state is achieved; (c) optionally reducing the particle size of the dried, coated absorbent polymer, using mechanical means; (d) coating the dried particles of water-absorbent polymer with a surface crosslinker, in direct form of in the form of a solution; and (e) heating the coated, water-absorbent particles under conditions such that the surface crosslinker and carboxyl groups of the water-absorbent polymer react, resulting in crosslinking of the surface.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BANDAGES, DRESSINGS OR ABSORBENT PADS CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DISINFECTION, STERILISATION, OR DEODORISATION OF AIR FERTILISERS FERTILISERS CHARACTERISED BY THEIR FORM FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION GENERAL PROCESSES OF COMPOUNDING HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MANUFACTURE THEREOF MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05 MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS ORGANIC MACROMOLECULAR COMPOUNDS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROSTHESES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS WORKING-UP |
| title | New polymer particles which are useful for absorption of aqueous fluids |
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