公开(公告)号：AU2003250155A1

公开(公告)日：2004-03-11

申请号：AU2003250155

申请日：2003-07-24

Applicant: BASF AG

Inventor： HERFERT NORBERT ,  MITCHELL MICHAEL A ,  AZAD MICHAEL M ,  WOODRUM GUY T ,  CHIANG WILLIAM G-J

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/60 ,  B01J20/12 ,  B01J20/26 ,  C08J3/12 ,  C08J3/24 ,  C08K3/34 ,  A61L15/18

Abstract: Surface-crosslinked superabsorbent polymer (SAP) particles having a clay in the vicinity of the surfaces of the SAP particles a clay are disclosed. The clay is added to SAP particles during surface crosslinking to substantially reduce the generation, and recycling, of SAP fines, and to provide SAP particles having an improved acquisition rate of fluids and an improved permeability of a fluid through the swollen SAP particles. Diaper cores and absorbent articles containing the surface crosslinked SAP particles also are disclosed.

公开(公告)号：DE10054650A1

公开(公告)日：2002-05-08

申请号：DE10054650

申请日：2000-11-03

Applicant: BASF AG

Inventor： VOLLMANN HANS-PETER ,  SKUPIN GABRIEL ,  WITT UWE ,  HERFERT NORBERT ,  YAMAMOTO MOTONORI

IPC: A61F13/15 ,  C08G63/199 ,  C08G63/672 ,  C08J5/18 ,  C08J5/04 ,  C08G63/20 ,  C08J7/04

Abstract: A back sheet for hygiene articles contains a sheet of biodegradable polymer with high water vapor permeability and high flexibility, consisting of partly aromatic polyester based on an acid component comprising 50-70 mol% (cyclo)aliphatic dicarboxylic acid and 30-50 mol% aromatic dicarboxylic acid, plus (cyclo)alkanediol(s) and optional components. A back sheet for hygiene articles contains a sheet of biodegradable polymer (BP) with a water vapor permeability of 100-5000 g/m /24 hours (ASTM F 1249; at 38 deg C and 90% RH) and an elastic modulus of 20-300 MPa (ISO 527; cross-head speed 1 mm/min). The polymer (BP) is a partly aromatic polyester based on (A) an acid component comprising (a1) 50-70 mol% aliphatic and cycloaliphatic dicarboxylic acid(s) (or ester-forming derivatives), (a2) 30-50 mol% aromatic dicarboxylic acid(s) (or ester-forming derivatives) and (a3) 0-5 mol% of a compound with sulfonate groups, (B) 2-12C alkanediol(s) and 5-10C cycloalkanediol(s) and optionally the following: (C) a component selected from (c1) ether function-containing diols of formula HO-((CH2)n-O)m-H (I), (C2) hydroxy-acids of formula (IIa) or (IIb), (c3) 2-12C aminoalkanols and 5-10C aminocyclo-alkanols, (c4) diamino-(1-8C alkanes), (c5) 2,2'-bis-oxazolines of formula (III) and (c6) amino-acids selected from natural amino-acids, polyamides with a mol. wt. of not more than 18000 (by polymerisation of 4-6C diacids with 4-10C diamines), compounds of formula (IVa) or (IVb) and polyoxazolines with repeating units of formula (V) and (D) a component selected from (d1) compounds with at least 3 ester-forming groups, (d2) isocyanates and (d3) divinyl ethers. HO-(-C(O)-G-O-)pH (IIa) n = 2, 3 or 4; m = 2-250; p = 1-1500; r = 1-4; G = phenylene, -(CH2)q-, -CHR- or -CHR-CH2-; q = 1-5; R = methyl or ethyl; R = a single bond, -(CH2)z- or phenylene; z = 2, 3 or 4; s = 1-1500; t = 1-4; T = as for G, except that q = 1-12; R = H, 1-6C alkyl, 5-8C cycloalkyl, phenyl (optionally substituted with up to three 1-4C alkyl groups) or tetrahydrofurfuryl.

公开(公告)号：PL347935A1

公开(公告)日：2002-04-22

申请号：PL34793599

申请日：1999-11-18

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  HERFERT NORBERT ,  ENGELHARDT FRIEDRICH

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/18 ,  A61L15/60 ,  C08F2/44 ,  C08F20/04 ,  C08K3/34

Abstract: The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.

公开(公告)号：DE10047719A1

公开(公告)日：2002-04-11

申请号：DE10047719

申请日：2000-09-27

Applicant: BASF AG

Inventor： HAEHNLE HANS-JOACHIM ,  BAUMGARTL HORST ,  HERFERT NORBERT

IPC: A61F13/53 ,  A61F13/00 ,  A61F13/15 ,  A61F13/49 ,  A61L15/26 ,  A61L15/42 ,  C08G12/26 ,  C08G12/32 ,  C08J9/28 ,  C08J9/36 ,  C08L61/32 ,  C08J9/22

Abstract: The invention relates to hydrophilic, open-cell, elastic foams consisting of melamine/formaldehyde resins. Said foams can be obtained by (a) heating and cross-linking an aqueous solution or dispersion, containing, respectively, at least one melamine/formaldehyde precondensate, an emulsifier, an expanding agent and a hardener, a foam being formed, (b) subsequently tempering the foam for a period of 1 to 180 minutes at 120 to 300 DEG C, volatile parts being removed, and (c) treating the foam with at least one polymer during or after the tempering process, said polymer containing primary and/or secondary amino groups and having a molar mass of at least 300. The invention also relates to a method for producing the hydrophilic, open-cell, elastic foams and to their use in hygiene products for absorbing, distributing and immobilising bodily fluids.

公开(公告)号：DE19849499A1

公开(公告)日：2000-05-04

申请号：DE19849499

申请日：1998-10-27

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  KLOTZSCHE HELMUT ,  SCHLIWA RONALD ,  STUEVEN UWE

IPC: B01J20/26 ,  B01J20/30 ,  B29B13/06 ,  C08F6/00 ,  C08J3/00 ,  C08J3/12 ,  F26B1/00

Abstract: The present invention relates to a complete drying method for hydrogels, whereby the following steps are carried out successively: a) the hydrogels are contact dried or dried by convection, b) the hydrogels are pre-crushed, c) the pre-crushed hydrogels are ground by means of a coarse crushing mill or a crushing roller mill, d) the damp elastic hydrogel particles are separated, e) the damp elastic hydrogel particles are finally dried.

公开(公告)号：CA2345625A1

公开(公告)日：2000-04-20

申请号：CA2345625

申请日：1999-10-01

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  FUNK RUDIGER ,  HERFERT NORBERT ,  ENGELHARDT FRIEDRICH ,  WANIOR MARIOLA

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  C08F2/10 ,  C08F6/02 ,  C08F6/26 ,  C08F8/00 ,  C08F8/42 ,  C08F20/02 ,  C08F22/00 ,  C08F28/02 ,  C08F30/02 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00

Abstract: The invention relates to a hydrophilic hydrogel with a high swelling capacit y. The inventive hydrogel is based on (co)polymerised monomers or graft (co)polymers and is produced by a) radical (co)polymerisation of one or more hydrophilic monomers or graft (co)polymerisation of one or more hydrophilic monomers to a graft base, the average degree of neutralisation of the monome rs containing the acid groups being 0 to 40 mol. %, b) reducing the acidic hydrogel, c) neutralising the acidic hydrogel to an end degree of neutralisation of 50 85 mol. % by adding a neutralising agent, d) drying, milling, and sieving the hydrogel particles, the hydrogel having a centrifug e retention of at least 29g/g for a 0.9 % aqueous NaCl solution and a swelling height of at least 3.5 cm with vertical absorption (1 g) and an extractable content (16 h-value) of less than 5 % or a centrifuge retention of at least 23g/g for a 0.9 % aqueous NaCl solution and a swelling height of at least 5 cm with vertical absorption (3 g) and an extractable content (16 h-value) of le ss than 5 % t.

公开(公告)号：DE19846413A1

公开(公告)日：2000-04-13

申请号：DE19846413

申请日：1998-10-08

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  SCHLIWA RONALD ,  STUEVEN UWE ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08F8/44 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/00 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08J3/12 ,  C09K3/00 ,  C08F6/02

Abstract: Preparation of a water-swellable hydrophilic polymer (I) involves: (a) radical (co)polymerization of hydrophilic monomer(s) (II), or graft (co)polymerization of (II) onto a substrate, where the average degree of neutralization of acid monomers is 0-40 mol. %, (b) comminuting, (c) post-neutralizing (60-85 mol. %) in a shredder under specific conditions; (d) charging the particles to a band drier, without further mechanical shear; (e) drying; and (f) grinding and sieving. Preparation of a water-swellable hydrophilic polymer (I) involves: (a) radical (co)polymerization of one or more hydrophilic monomer(s) (II), or graft (co)polymerization of one or more (II) onto a substrate (III), where the average degree of neutralization of the monomers containing acid groups is 0-40 mol. %, (b) comminuting the acid hydrogel, (c) post-neutralizing to a final neutralization degree of 60-85 mol. % in a shredder of a system having a screw, rotating knives, damming zones and perforated disks, operating at an output of 1000-6000 Wh/m , energy dissipation density 400-800 W/l, dwell time 5-30 s and free hole surface 20-40% of the perforated disk; (d) charging the neutralized hydrogel particles to a band drier, without application of further mechanical shear force; (e) drying the particles in the band drier; and (f) grinding and sieving the dried hydrogel particles.

公开(公告)号：DE19846412A1

公开(公告)日：2000-04-13

申请号：DE19846412

申请日：1998-10-08

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  FUNK RUEDIGER ,  HERFERT NORBERT ,  WANIOR MARIOLA ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  C08F2/10 ,  C08F6/02 ,  C08F6/26 ,  C08F8/00 ,  C08F8/42 ,  C08F20/02 ,  C08F22/00 ,  C08F28/02 ,  C08F30/02 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08F283/00

Abstract: A new hydrophilic, highly swellable hydrogel (I) is obtained by: (a) radical (co)polymerization of hydrophic monomer(s) (II), or graft (co)polymerization of (II) onto a substrate; (b) comminuting; (c) post-neutralizing; and (d) drying, grinding and sieving, and has characteristic centrifuge retention, swelling height on vertical absorption and extractable content properties. A novel hydrophilic, highly swellable hydrogel (I) is obtained by; (a) radical (co)polymerization of one or more hydrophic monomer(s) (II), or graft (co)polymerization of one or more (II) onto a substrate (III), where the average degree of neutralization of the monomers containing acid groups is 0-40 mol. %; (b) comminuting the acid hydrogel; (c) post-neutralizing to a final neutralization degree of 50-85 mol. %; (d) and drying, grinding and sieving the hydrogel particles. (I) has either: (i) a centrifuge retention for 0.9% aqueous sodium chloride solution of at least 29 g/g, a swelling height on vertical absorption (1 g) of at least 3.5 cm and an extractable content (16 hour value) of less than 5%; or (ii) a centrifuge retention for 0.9% aqueous sodium chloride solution of at least 23 g/g, a swelling height on vertical absorption (3 g) of at least 3.5 cm and an extractable content (16 hour value) of less than 4%.

公开(公告)号：CA2316342A1

公开(公告)日：1999-07-29

申请号：CA2316342

申请日：1999-01-20

Applicant: BASF AG

Inventor： RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  FUNK RUDIGER ,  ENGELHARDT FRITZ ,  DANIEL THOMAS ,  HERFERT NORBERT

IPC: C08J7/04 ,  B01J13/02 ,  B01J20/26 ,  C08F251/00 ,  C08F251/02 ,  C08J3/12 ,  C08L51/00 ,  C08L51/02

Abstract: The invention relates to a hydrogel, comprising a hydrophilic hydrogel with a high swelling capacity which is reversibly coated with a material which delays or prevents the uptake of water or aqueous fluids. The invention also relates to a method for producing the hydrogel and to a method for releasing said hydrophilic hydrogel with a high swelling capacity.

公开(公告)号：AT374047T

公开(公告)日：2007-10-15

申请号：AT03722563

申请日：2003-04-29

Applicant: BASF AG

Inventor： HERFERT NORBERT ,  MITCHELL MICHAEL ,  ENGELHARDT FRIEDRICH

IPC: A61F13/53 ,  A61L15/60 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/42 ,  B32B27/18 ,  B32B27/22 ,  C08K5/04 ,  C08L101/14

Abstract: A flexible absorbent sheet material containing an acidic water-absorbing resin, a basic water-absorbing resin, and a plasticizer, and its method of manufacture, are disclosed. The sheets contain about 60% to 100% by weight of the acidic and basic water-absorbent resin and plasticizer. The absorbent sheets have unexpected flexibility and structural integrity, while exhibiting exceptional water absorption and retention properties.