公开(公告)号：DE3272390D1

公开(公告)日：1986-09-04

申请号：DE3272390

申请日：1982-12-16

Applicant: BASF AG

Inventor： HOEHR LOTHAR DR ,  LACH DIETRICH DR ,  STREICHER ROLF

IPC: C14C3/22 ,  C14C3/28

Abstract: An amino-containing and carboxyl-containing polymer tanning agent containing more carboxyl groups than amino groups, when used for retanning mineral-tanned leather, gives, alone or in combination with conventional anionic retanning agents, leather which is readily dyeable and has good sensory properties.

公开(公告)号：DE3260040D1

公开(公告)日：1984-03-15

申请号：DE3260040

申请日：1982-02-27

Applicant: BASF AG

Inventor： HAHN ERWIN DR ,  LACH DIETRICH DR ,  SCHNEIDER KURT DR ,  STRICKLER RAINER DR ,  STREICHER ROLF

IPC: C14C1/08

Abstract: Conventionally limed hides are delimed for from one to six hours under conventional deliming conditions in respect of liquor length, temperature and pH of the liquor, by a process in which a cyclic carbonate of a polyhydric aliphatic alcohol of 2 to 6 carbon atoms is employed as the active agent.

公开(公告)号：DE3062049D1

公开(公告)日：1983-03-24

申请号：DE3062049

申请日：1980-09-09

Applicant: BASF AG

Inventor： HAHN ERWIN DR ,  LACH DIETRICH DR ,  STREICHER ROLF

IPC: C14C1/04

Abstract: An auxiliary for the soaking of hides and skins, which consists of a salt of the formula I M+[O3S-S-R]- I where R is an organic radical of 1 to 8 carbon atoms, which may carry one or more functional groups, and M+ is one equivalent of a cation, mixtures thereof with other conventional soaking auxiliaries, and processes for their use. Using the novel auxiliary avoids all toxicity hazards and odor nuisance, as well as avoiding oxidation losses, and achieves good loosening of the hair.

公开(公告)号：AU527869B2

公开(公告)日：1983-03-24

申请号：AU5422779

申请日：1979-12-28

Applicant: BASF AG

Inventor： LACH DIETRICH ,  STREICHER ROLF ,  FEICHTMAYR FRANZ

IPC: D06P1/41 ,  D06P1/60 ,  D06P3/32 ,  C08L71/02 ,  D06P1/607 ,  D06P1/613

Abstract: A process for dyeing grain leather with anionic dyes under the conventional conditions for exhaustion methods, in the presence of two specific surfactants. The combined use of the two surfactants results, in the case of cationically tanned (essentially mineral-tanned) leather, in an improvement in the levelness and dye penetration and in the case of anionically tanned (synthetics-tanned or vegetable-tanned) or retanned leather, in an increase in depth of the color. The two surfactants are (a) an aliphatic alcohol of 9 to 24 carbon atoms oxyethylated with from 3 to 120 ethylene oxide units and (b) an aliphatic amine of 8 to 20 carbon atoms oxyethylated with from 6 to 80 ethylene oxide units, and they are used in a weight ratio of a:b of from 1:4 to 4:1 and in a total amount of from 0.3 to 3%, based on shaved weight.

公开(公告)号：DE3115646A1

公开(公告)日：1982-11-18

申请号：DE3115646

申请日：1981-04-18

Applicant: BASF AG

Inventor： LACH DIETRICH DIPL CHEM DR ,  STREICHER ROLF ,  BOLZ GERHARD DIPL CHEM DR

IPC: C14C3/08 ,  C08G12/40 ,  C14C3/06 ,  C14C3/16 ,  C14C3/20 ,  C14C3/28

Abstract: Water-soluble or self-dispersing resin tanning agents are prepared by heating from 5 to 30% by weight of melamine, from 15 to 45% by weight of urea, from 20 to 35% by weight (calculated as anhydrous material) of formaldehyde and from 15 to 55% by weight of sodium bisulfite or of a corresponding amount of some other salt of sulfurous acid for from two to twelve hours in aqueous solution at 40 DEG -120 DEG C. and a pH of from 5 to 9.

公开(公告)号：DE3108428A1

公开(公告)日：1982-09-23

申请号：DE3108428

申请日：1981-03-06

Applicant: BASF AG

Inventor： HAHN ERWIN DIPL CHEM DR ,  LACH DIETRICH DIPL CHEM DR ,  SCHNEIDER KURT DIPL CHEM DR ,  STRICKLER RAINER DIPL CHEM DR ,  STREICHER ROLF

IPC: C14C1/08

Abstract: Conventionally limed hides are delimed for from one to six hours under conventional deliming conditions in respect of liquor length, temperature and pH of the liquor, by a process in which a cyclic carbonate of a polyhydric aliphatic alcohol of 2 to 6 carbon atoms is employed as the active agent.