Patent · US Active

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

US7759422B2 · kind B2 · utility

0Cited by

4References

26Claims

0Family size

Assignee

BASF SE

Inventors

Ulrich Riegel · Landstuhl, DE
Thomas Daniel · Waldsee, DE
Dieter Hermeling · Haßloch, DE
Mark Elliott · Ludwigshafen, DE

Key dates

Filing date	Oct 14, 2005
Grant date	Jul 20, 2010
Priority date	—
Expiry date	Oct 20, 2027

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61L15/60
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

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 cm3s, the Transportation Value (TV) being the product of Saline Flow Conductivity (SFC) and wicking absorption after 60 minutes (DA60) multiplied by 107, and wherein the wicking absorption after 60 minutes (DA60) 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 μm 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.