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公开(公告)号：YU43898B
公开(公告)日：1989-12-31
申请号：YU74786
申请日：1986-05-08
Applicant: HOECHST AG
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.
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Patent Agency Ranking
公开(公告)号：NZ217383A
公开(公告)日：1989-10-27
申请号：NZ21738386
申请日：1986-08-28
Applicant: HOECHST AG
Inventor： BATHELT H , EHRL W , WEHOWSKY F , KLEBER R , LOTZ W , GLENZ W , HERDT H , JACKEL L , MAST J-H
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 , C07C125/073 , D06M13/38
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.
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公开(公告)号：YU74786A
公开(公告)日：1987-12-31
申请号：YU74786
申请日：1986-05-08
Applicant: HOECHST AG
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.
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公开(公告)号：ZA756305B
公开(公告)日：1976-10-27
申请号：ZA756305
申请日：1975-10-06
Applicant: HOECHST AG
Abstract: The specification discloses flame retarding plastic materials which contain, as the flame retarding agent, an alkali salt or a group II or III metal salt of a phosphinic, diphosphinic or tri-phosphinic acid derived from 2-alkyl-2,5-dioxo-1,2-oxophospholane and an organic monoamine or diamine or triamine, respectively.
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