公开(公告)号：DE3632638A1

公开(公告)日：1988-03-31

申请号：DE3632638

申请日：1986-09-25

Applicant: HOECHST AG

Inventor： BECKER HERMANN ,  LOTZ WERNER DR

IPC: C14C3/18

Abstract: Use of a mixture of 20 to 80% by weight of a melamine-formaldehyde resin and 80 to 20% by weight of an anionically modified melamine-formaldehyde resin for tanning leather.

公开(公告)号：DE3711458A1

公开(公告)日：1988-10-13

申请号：DE3711458

申请日：1987-04-04

Applicant: HOECHST AG

Inventor： BECKER HERMANN ,  LOTZ WERNER DR ,  KELLER KARLFRIED DR

IPC: C14C3/18 ,  C14C3/20

Abstract: Use of a melamine/formaldehyde resin partially modified with 0.25 to 0.8 mol for tanning leather.

公开(公告)号：DE3765616D1

公开(公告)日：1990-11-22

申请号：DE3765616

申请日：1987-09-18

Applicant: HOECHST AG

Inventor： BECKER HERMANN ,  LOTZ WERNER DR ,  KELLER KARLFRIED DR

IPC: C14C3/18 ,  C14C3/20

Abstract: Use of a resin mixture of, or of a mixed resin from, a melamine-formaldehyde resin and an anionically modified melamine-formaldehyde resin for tanning leather. The anionic modification of the melamine-formaldehyde resin is obtained by preparing the resin in the presence of alkali metal sulfite, alkali metal hydrogensulfite or alkali metal sulfamate. By partial modification it is possible to obtain a mixed resin, while mixing a modified with an unmodified resin gives a resin mixture.

公开(公告)号：DE3660552D1

公开(公告)日：1988-09-22

申请号：DE3660552

申请日：1986-05-02

Applicant: HOECHST AG

Inventor： LOTZ WERNER DR ,  FUCHS KARLHEINZ ,  HALLER SIEGMUND

IPC: C14C1/08 ,  C14C3/06

Abstract: Economy chrome tanning process wherein the pelts are pretreated before the tanning with 0.1 to 2% of an aldehyde- or keto-acid, preferably with glyoxylic acid or pyruvic acid, and are then tanned by customary methods. In this pretreatment, which is preferably carried out in the pickle, the tanning requires a chromium supply of only 1.25 to 1.5% of Cr2O3 on weight of pelt. Despite this reduced amount of chrome tannin the results obtained are boil-resistant leathers with uniform chromium distribution, excellent color levelness and very good physical properties.

公开(公告)号：DE3516842A1

公开(公告)日：1986-11-13

申请号：DE3516842

申请日：1985-05-10

Applicant: HOECHST AG

Inventor： LOTZ WERNER DR ,  FUCHS KARLHEINZ ,  HALLER SIEGMUND

IPC: C14C1/08 ,  C14C3/06 ,  C14C1/00

Abstract: Economy chrome tanning process wherein the pelts are pretreated before the tanning with 0.1 to 2% of an aldehyde- or keto-acid, preferably with glyoxylic acid or pyruvic acid, and are then tanned by customary methods. In this pretreatment, which is preferably carried out in the pickle, the tanning requires a chromium supply of only 1.25 to 1.5% of Cr2O3 on weight of pelt. Despite this reduced amount of chrome tannin the results obtained are boil-resistant leathers with uniform chromium distribution, excellent color levelness and very good physical properties.

公开(公告)号：AT57539T

公开(公告)日：1990-11-15

申请号：AT87113669

申请日：1987-09-18

Applicant: HOECHST AG

Inventor： BECKER HERMANN ,  LOTZ WERNER DR ,  KELLER KARLFRIED DR

IPC: C14C3/18 ,  C14C3/20

公开(公告)号：DE3672718D1

公开(公告)日：1990-08-23

申请号：DE3672718

申请日：1986-08-23

Applicant: HOECHST AG

Inventor： BATHELT HEINRICH DR ,  EHRL WINFRIED DR ,  WEHOWSKY FRANK DR ,  KLEBER ROLF DR ,  LOTZ WERNER DR ,  GLENZ WOLFGANG ,  HERDT HUBERT ,  JAECKEL LOTHAR ,  MAST JAN-HILBERT ,  HINTERMEIER KARL DR ,  MUELLER MANFRED

IPC: C09K3/18 ,  B27K3/38 ,  C07C67/00 ,  C07C239/00 ,  C07C271/06 ,  C07C271/28 ,  C08G65/32 ,  C09K3/00 ,  C14C9/00 ,  D06M13/02 ,  D06M13/224 ,  D06M13/322 ,  D06M13/342 ,  D06M13/345 ,  D06M13/425 ,  D06M13/428 ,  D06M13/463 ,  D06M101/00 ,  D06M101/02 ,  D06M101/10 ,  D06M101/12

Abstract: The novel urethanes correspond to the formula I below in which a denotes a number from 5 to 17 and b denotes a number from 1 to 7. These urethanes are prepared by reacting the corresponding perfluoroalkylethanol/epichlorohydrin adducts with toluelene diisocyanates. The novel aqueous dispersions are essentially composed of the novel urethanes, cationic or betaine emulsifiers and non-ionic emulsifiers, water-insoluble carboxylic and/or dicarboxylic acid esters and alkanediols or polyalkanediols which can be etherified on one or both sides, in water. The novel urethanes and the novel aqueous dispersions are used to impart an oleophobic and hydrophobic finish to textiles, leather and furs. They are also suitable for the treatment of unpainted timber, for example unpainted furniture.

公开(公告)号：AT54661T

公开(公告)日：1990-08-15

申请号：AT86111699

申请日：1986-08-23

Applicant: HOECHST AG

Inventor： BATHELT HEINRICH DR ,  EHRL WINFRIED DR ,  WEHOWSKY FRANK DR ,  KLEBER ROLF DR ,  LOTZ WERNER DR ,  GLENZ WOLFGANG ,  HERDT HUBERT ,  JAECKEL LOTHAR ,  MAST JAN-HILBERT ,  HINTERMEIER KARL DR ,  MUELLER MANFRED

IPC: C07C271/06 ,  C14C9/00 ,  D06M13/322

公开(公告)号：DE3605844A1

公开(公告)日：1987-08-27

申请号：DE3605844

申请日：1986-02-22

Applicant: HOECHST AG

Inventor： BATHELT HEINRICH DR ,  EHRL WINFRIED DR ,  WEHOWSKY FRANK DR ,  LOTZ WERNER DR ,  GLENZ WOLFGANG ,  HERDT HUBERT ,  MAST JAN-HILBERT ,  HINTERMAIER KARL DR ,  MUELLER MANFRED

IPC: B27K3/38 ,  C14C9/00 ,  D06M13/428 ,  C07C125/073

Abstract: The novel urethanes conform to the following formula I: where a is from 5 to 17 and b from 1 to 7. These urethanes are prepared by reacting the corresponding perfluoroalkylethanol-epichlorohydrin adducts with toluylene diisocyanates. The novel aqueous dispersions consist essentially of novel urethanes, cationic or betainic and nonionic emulsifiers, water-insoluble carboxylic and/or dicarboxylic esters and alkanediols or polyalkanediols, which may be etherified in either or both positions, in water. The novel urethanes and the novel aqueous dispersions are used for conferring oleophobic and hydrophobic properties on leather and furs.