A process for agglomerating superabsorbent particles, wherein polymer particles having a particle size of 250 m or less are dispersed in a hydrophobic organic solvent, the dispersed polymer particles are mixed with an aqueous monomer solution, the amount of unneutralized monomer applied with the monomer solution being from 0.5% to 80% by weight, based on the dispersed polymer particles, and the monomer solution is polymerized.

A process for agglomerating superabsorbent particles, wherein polymer particles having a particle size of 250 m or less are dispersed in a hydrophobic organic solvent, the dispersed polymer particles are mixed with an aqueous monomer solution, the amount of unneutralized monomer applied with the monomer solution being from 0.5% to 80% by weight, based on the dispersed polymer particles, and the monomer solution is polymerized.

The invention is directed to a process for producing a ABS composition comprising 30-80 wt.-% of copolymer A, 19.99-60 wt.-% of ABS-copolymer B, 0-40 wt.-% of polymer C and 0.01-20 wt.-% of additives D, having the steps: a) mixing the components A, B and D and optionally C, by using an extruder comprising: a first feeding zone FZ1, a preheating zone PZ, a mechanical dewatering zone DZ, in which component B is mechanically dewatered, and wherein: the mechanical dewatering zone DZ comprises at least one dewatering aperture, in particular for liquid water; in a second feeding zone FZ2, at least part of component A and optionally part of component D are fed, preferably in melt and/or solid form, to the ex-truder, in a degassing zone DG component A and/or component B are degassed, and b) removing the ABS molding composition from a discharge zone CZ of the extruder.

The invention is directed to a process for producing a ABS composition comprising 30-80 wt.-% of copolymer A, 19.99-60 wt.-% of ABS-copolymer B, 0-40 wt.-% of polymer C and 0.01-20 wt.-% of additives D, having the steps: a) mixing the components A, B and D and optionally C, by using an extruder comprising: a first feeding zone FZ1, a preheating zone PZ, a mechanical dewatering zone DZ, in which component B is mechanically dewatered, and wherein: the mechanical dewatering zone DZ comprises at least one dewatering aperture, in particular for liquid water; in a second feeding zone FZ2, at least part of component A and optionally part of component D are fed, preferably in melt and/or solid form, to the ex-truder, in a degassing zone DG component A and/or component B are degassed, and b) removing the ABS molding composition from a discharge zone CZ of the extruder.

A process for improving a latex comprising the steps of (a) providing a latex comprising a polymer binder, wherein said polymer binder is formed by polymerization of a monomer mixture comprising one or more ethylenically unsaturated carboxylic acid functional monomer, and (b) passing said latex comprising said polymer binder over a cation exchange resin.

A process for improving a latex comprising the steps of (a) providing a latex comprising a polymer binder, wherein said polymer binder is formed by polymerization of a monomer mixture comprising one or more ethylenically unsaturated carboxylic acid functional monomer, and (b) passing said latex comprising said polymer binder over a cation exchange resin.

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the agglomerated base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 140 to 220 C.

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the agglomerated base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 140 to 220 C.

With respect to water-absorbent resins, there are provided a method of manufacturing a water-absorbent resin having an appropriate BET specific surface and a water-absorption rate and a water-absorbing agent and an absorbent article that are formed by using the water-absorbent resin. In a first aspect of the present invention, when reverse phase suspension polymerization of two steps or more is performed on a water-soluble ethylenically unsaturated monomer in a hydrocarbon dispersion medium in the presence of at least an azo compound, a peroxide and an internal-crosslinking agent, the used amount of the internal-crosslinking agent at the time of the polymerization of a first step is adjusted to fall within a range of 0.015 to 0.150 mmol per mole of the water-soluble ethylenically unsaturated monomer used at the time of the polymerization of the first step and he polymerization is performed such that, the BET specific surface area of secondary particles formed by agglomeration of primary particles obtained is controlled.

With respect to water-absorbent resins, there are provided a method of manufacturing a water-absorbent resin having an appropriate BET specific surface and a water-absorption rate and a water-absorbing agent and an absorbent article that are formed by using the water-absorbent resin. In a first aspect of the present invention, when reverse phase suspension polymerization of two steps or more is performed on a water-soluble ethylenically unsaturated monomer in a hydrocarbon dispersion medium in the presence of at least an azo compound, a peroxide and an internal-crosslinking agent, the used amount of the internal-crosslinking agent at the time of the polymerization of a first step is adjusted to fall within a range of 0.015 to 0.150 mmol per mole of the water-soluble ethylenically unsaturated monomer used at the time of the polymerization of the first step and he polymerization is performed such that, the BET specific surface area of secondary particles formed by agglomeration of primary particles obtained is controlled.