초록 ▼

The invention relates to powdery cross-linked polymers (superabsorbers) capable of absorbing aqueous liquids and blood, which are formed of 55-99.9%-wt. polymerized unsaturated, polymerizable acid-groups-comprising monomers which are neutralized to the extent of at least 25 mol-%, b) 0-40%-wt. polym

The invention relates to powdery cross-linked polymers (superabsorbers) capable of absorbing aqueous liquids and blood, which are formed of 55-99.9%-wt. polymerized unsaturated, polymerizable acid-groups-comprising monomers which are neutralized to the extent of at least 25 mol-%, b) 0-40%-wt. polymerized unsaturated monomers copolymerizable with a), c) 0.1-5.0%-wt. of a cross-linking agent, d) 0-30%-wt. of a water-soluble polymer, whereby the weight amounts of a) to d) relate to anhydrous polymers, characterized in that 100 parts of the particle-shaped polymers have been mixed with an aqueous solution consisting of a maximum of 10 parts of an at least 10% phosphoric acid and a) 0.05-0.3 parts of a compound capable of reacting with at least two carboxyl groups and not comprising an alkali-salt-forming group in the molecule, and/or b) 0.05-1 parts of a compound capable of reacting with at least two carboxyl groups and comprising an alkali-salt-forming group in the molecule, and that they have been heated to 150°-250°C. The superabsorbers according to the invention have a high retention capacity, high gel strength and a high absorption under load and can be manufactured without an organic solvent and with only a small amount of treatment agent for the surface treatment of the powdery polymer. The invention further relates to the use of said polymers in textile constructions for the absorption of body liquids, said constructions preferably consisting of 2 to 80%-wt. superabsorber and the remainder up to 100 of hydrophilic fibers.

대표청구항 ▼

A powdery polymer composition which is capable of absorbing aqueous or serous liquids and blood comprising: (A) a cross-linked polymer formed of: a) 55-99.9%-wt. polymerized unsaturated, polymerizable acid-groups-comprising monomers which are neutralized to the extent of at least 25 mol-%, b) 0-40%-

A powdery polymer composition which is capable of absorbing aqueous or serous liquids and blood comprising: (A) a cross-linked polymer formed of: a) 55-99.9%-wt. polymerized unsaturated, polymerizable acid-groups-comprising monomers which are neutralized to the extent of at least 25 mol-%, b) 0-40%-wt. polymerized unsaturated monomers which are copolymerizable with a), and c) 0.1-5.0%-wt. of a cross-linking agent, and (B): d) 0-30%-wt. of a water-soluble polymer, the weight amounts of a) to d) being based on said cross-linked polymer, wherein 100 parts of particles of said polymer composition is mixed with at least 0.1 and not more than 10 parts by weight of an at least 10% by weight aqueous solution of phosphoric acid, and e) 0.05-0.3 parts by weight, based on said polymer composition, of a compound capable of reacting with at least two carboxyl groups and not comprising an alkali-salt-forming group in the molecule, and/or f) 0.05-1 parts by weight, based on said polymer composition, of a compound capable of reacting with at least two carboxyl groups and comprising an alkali-salt-forming group in the molecule, and heated to 150°-250°C.