HYDROPHILIC, HIGHLY SWELLABLE HYDROGEL

Title:

HYDROPHILIC, HIGHLY SWELLABLE HYDROGEL

Document Type and Number:

Japanese Patent JPH0884927

Kind Code:

A

Abstract:

To obtain absorbents for aq. liquid without fines at all and having abrasion-fastness and high swellability by coating with non-reactive, water- insoluble film-forming polymers in hydrophilic, highly swellable hydrogels used as absorbents in hygiene products.

The absorbents for aq. liquid are formed by coating hydrophilic, highly swellable hydrogels with non-reactive, water-insoluble film-forming polymers. Preferable polymers have the film-forming ability within the range from -1 to 130°C and are water-insoluble but permeable in water or swellable in an aq. soln. In particular, those forming polymer films having tensile strength of 0.5-15 Newton/mm and elongation at break of 100%-1,000% are used. As these polymers, there may be mentioned homo- or copolymers of vinyl esters, homo- or copolymers of acrylic or methacrylic esters and polyacetals or the like.

Inventors:

ENGELHARDT FRITZ DR (DE)
HERFERT NORBERT DR (DE)
STUVEN UWE (DE)
RIEGEL ULRICH (DE)
FUNK RUDIGER DR (DE)
SEIP DETLEV DR (DE)

Application Number:

JP18745195A

Publication Date:

April 02, 1996

Filing Date:

July 24, 1995

Export Citation:

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Assignee:

HOECHST AG

International Classes:

A61F13/15; A61F13/49; B01D15/00; B01J20/26; C08G59/40; C08J3/12; C08J7/04; C08L1/00; C08L1/02; C08L3/00; C08L3/04; C08L33/04; C08L33/08; C08L33/10; C08L51/00; C08L59/00; C08L63/00; C08L67/00; A61F13/53; C08L67/02; C08L69/00; C08L75/00; C08L75/02; C08L75/04; C08L83/02; C08L83/04; C08L101/00; (IPC1-7): B01J20/26; A61F13/46; A61F13/15; B01D15/00; C08J7/04; C08L1/02; C08L3/04; C08L33/04; C08L33/08; C08L33/10; C08L51/00; C08L59/00; C08L63/00; C08L67/02; C08L69/00; C08L75/02; C08L75/04; C08L83/04

Attorney, Agent or Firm:

Mitsufumi Ezaki (3 others)

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