Basf Aktiengesellschaft

Basf Se Corporation

The Procter Gamble Company

Mark Elliott

Thomas Daniel

Ulrich Riegel

Dieter Hermeling

Matthias Weismantel

Reinhold Schwalm

Frank Dietsche

Stefan Bruhns

Mattias Schmidt

Axel Meyer

Renae Dianna Fossum

Karl Haeberle

Jean-Philippe Marie Autran

Uwe Stueven

Kai Michael Exner

Klemens Massonne

Norbert Herfert

Volker Braig

Michael De Marco

Karl Häberle

Hui Ge

Paul Walter McCormack

Andrea Karen Bennett

Ubbo Von Oehsen

Li Guo Duan

Michael Mitchell

James Scott Madsen

A belt drier arrangement for drying an aqueous polymer gel and for comminuting the dried polymer gel to give dried polymer particles, having: a belt drier having a drier setup and a conveyor belt for receiving and for drying the aqueous polymer gel to give a dry cake or fragments on a receiving surface of the conveyor belt, and a comminution arrangement, disposed downstream of the drier setup in product flow direction, for comminution of the dried polymer gel of the dry cake or fragments to give dried comminuted polymer particles. The comminution arrangement has a comminutor in the form of a milling drum which is disposed with an upper working line of a working edge of the milling drum at the level of or above a receiving surface of a conveyor belt, for mill processing of the dry cake or of the fragments, where the milling drum is designed to eject comminuted dried polymer particles of the dry cake or of the fragments in the downward direction.

Belt dryer arrangement for drying an aqueous polymer gel and for comminuting the dried polymer gel to form dried polymer particles, and method for drying an aqueous polymer gel and for comminuting the dried polymer gel to form dried polymer particles

The present invention relates to a water absorbing material obtainable by a process comprising the steps of bringing particles of a non surface-crosslinked water-absorbing polymer in contact with

Water-absorbing polymeric particles and method for the production thereof

A superabsorbent produced by polymerizing a monomer mixture which comprises at least one ethylenically unsaturated monomer bearing at least one acid group, at least 0.1% by weight and at most 20% by weight, based on the total amount of ethylenically unsaturated monomers bearing at least one acid group (calculated as the free acid), of at least one alkaline earth metal salt (calculated without water of crystallization) selected from the salts of calcium, strontium or barium having been added before or during the polymerization and/or, if the polymerization is followed by a separate drying step, to the polymer before the drying, exhibits improved stability to discoloration in the course of storage under elevated temperatures and/or elevated air humidity.

Color-stable superabsorber

To prepare superabsorbents with a low residual monomer content, a salt of urea with an inorganic acid is added to the monomer mixture before or during the polymerization or to the polymer after the polymerization but before a heat treatment which follows the polymerization.

Method for producing superabsorbers with a low residual monomer content

Water-absorbing polymeric particles are produced by polymerizing a monomer solution or suspension comprising at least one unsaturated carboxylic acid and at least one hydroquinone monoether, and coating the polymeric particles with at least one salt of a tervalent metal cation of a carboxylic acid and/or at least one basic salt of a tervalent metal cation.

Method for producing white and color-stable water-absorbing polymer particles having high absorbency and high saline flow conductivity

The present invention relates to an absorbent structure suitable in, or being an adult or infant diaper or feminine hygiene article, comprising a water-absorbing material comprising water-absorbing particles that comprise a film coating, comprising an elastic film-forming polymer and an antioxidant. The invention also relates to an absorbent structure comprising a water absorbent material obtainable by a process of:

Absorbent structure with improved water-absorbing material comprising polyurethane, coalescing aid and antioxidant

The invention concerns a process for producing water-absorbing polymer, which comprises a base polymer A being mixed with a first aqueous solution B of at least one surface postcrosslinker and a second aqueous solution C of at least one polyvalent cation and thermally treated, wherein said base polymer A is based on at least 50% neutralized acid-functional monomer and said solutions B and C are metered wholly or partly concurrently through separate nozzles whereby a water-absorbing polymer having a high saline flow conductivity value is obtained.

Postcrosslinking of water-absorbing polymers

The present invention relates to an absorbent structure suitable in, or being an adult or infant diaper or feminine hygiene article, comprising a water-absorbing material comprising water-absorbing particles that comprise a film coating, comprising an elastic film-forming polymer and a coalescing agent. The invention also relates to an absorbent structure comprising a water absorbent material obtainable by a process of:

Absorbent structure with improved water-absorbing material

The present invention relates to a process for producing water-absorbing polymeric particles by polymerizing a monomer solution, which comprises removing the polymer gel from the reactor when the gel temperature is at least 50&#xb0; C. and the monomer conversion is not more than 90 mol %, and also to a process for producing hygiene articles.

Production of water-absorbing polymeric particles

Swellable hydrogel-forming polymers having high permeability Swellable hydrogel-forming polymer comprising at least one hydrophilic polymer of dendritic structure and at least one water-insoluble phosphate, a process for preparing the swellable hydrogel-forming polymer and also its use in hygiene articles.

Swellable hydrogel-forming polymers having high permeability

The invention concerns water-absorbing polymeric particles possessing high saline flow conductivity in the swollen state which comprise insoluble metal sulfates as synergistic fillers, and also a process for their production and their use.

Insoluble metal sulfates in water absorbing polymeric particles

Disclosed are novel (meth)acrylic esters of monoalkoxylated polyols, a process for their preparation and their use for preparing crosslinked swellable hydrogel-forming polymers and crosslinked swellable hydrogel-forming polymers.

(Meth)acrylic esters of monoalkoxylated polyols, and production thereof

The invention relates to finely divided water-absorbing polymeric particles having high fluid transportation and absorption performance, the Centrifuge Retention Capacity (CRC) being not less than 26 g/g, the absorbency under a load of 4.83 kPa (AUL0.7 psi) not less than 23 g/g and the Transportation Value (TV) not less than 15,000 cms, the Transportation Value (TV) being the product of Saline Flow Conductivity (SFC) and wicking absorption after 60 minutes (DA) multiplied by 10, and wherein the wicking absorption after 60 minutes (DA) is the weight of 0.9% by weight sodium chloride solution absorbed by 70 g of the water-absorbing polymeric particles in 60 minutes, wherein the water-absorbing polymeric particles are situated, during measurement, in a circularly round vessel which has an internal diameter of 6 cm and is sealed at its lower end by a sieve base of 36 &#x3bc;m mesh size, and the sieve base is in atmospheric contact with 0.9% by weight sodium chloride solution, processes for their preparation and also their use in hygiene articles and packaging materials.

Fine-grained water-absorbent particles with a high fluid transport and absorption capacity

A process for postcrosslinking a water-absorbing polymer comprises said polymer being treated with a postcrosslinker and, during or after said treating, being postcrosslinked and dried by temperature elevation, said postcrosslinker being a compound of the formula I where R, R, R, R, R, R, R, Rand Rare each independently hydrogen, C-C-alkyl, C-C-alkenyl or C-C-aryl, wherein C-C-alkyl, C-C-alkenyl or C-C-aryl may be halogen substituted. The liquid-absorbing polymers are useful in hygiene articles and packaging materials.

Growing community of inventors

Ludwigshafen, Germany

Mark Elliott