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公开(公告)号：US10815542B2
公开(公告)日：2020-10-27
申请号：US16410233
申请日：2019-05-13
摘要： A composition including an acetal of an aldehydic tanning agent for tanning hides and/or pelts, as well as a method for tanning hides and/or pelts in order to produce leather, wherein an acetal of an aldehydic tanning agent is used. By reducing the pH, the aldehydic tanning agent can be released, whereby a tanning step is initiated. The composition according to the invention and the method according to the invention are characterized by lower toxicity compared to conventional compositions and tanning methods based on aldehydic tanning agents. Furthermore, improved penetration of the tanning agents into deeper layers of the hide and/or the pelt is possible, so that particularly homogeneous tanning is achieved.
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公开(公告)号：US20190309379A1
公开(公告)日：2019-10-10
申请号：US16410233
申请日：2019-05-13
IPC分类号： C14C3/16
摘要： A composition including an acetal of an aldehydic tanning agent for tanning hides and/or pelts, as well as a method for tanning hides and/or pelts in order to produce leather, wherein an acetal of an aldehydic tanning agent is used. By reducing the pH, the aldehydic tanning agent can be released, whereby a tanning step is initiated. The composition according to the invention and the method according to the invention are characterized by lower toxicity compared to conventional compositions and tanning methods based on aldehydic tanning agents. Furthermore, improved penetration of the tanning agents into deeper layers of the hide and/or the pelt is possible, so that particularly homogeneous tanning is achieved.
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公开(公告)号：US11365456B2
公开(公告)日：2022-06-21
申请号：US16467609
申请日：2017-12-04
IPC分类号： C14C9/00 , C08F220/06 , C08F220/68 , C08L33/02 , C08L33/10 , C14C3/22
摘要： A method of preparing hydrophobicizing leather treatment compositions includes the steps of a) free-radically initiated copolymerization of i) at least one ethylenically unsaturated carboxylic acid or its derivatives, and ii) at least one (meth)acrylate of a primary saturated C8 to C22 alcohol, b) mixing the reaction mixture obtained after step a) with water, c) salting at least some of the carboxyl groups of the reaction mixture obtained after step b) with a base, and d) shearing the reaction mixture obtained after step c) to an average particle size of 0.05-10 μm, wherein step a) is carried out in oil as reaction medium and wherein the atmosphere in step a) contains less than 0.1% by volume of an oxidizing gas.
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公开(公告)号：US20190106758A1
公开(公告)日：2019-04-11
申请号：US16089523
申请日：2017-03-29
IPC分类号： C14C3/16
摘要： A composition including an acetal of an aldehydic tanning agent for tanning hides and/or pelts, as well as a method for tanning hides and/or pelts in order to produce leather, wherein an acetal of an aldehydic tanning agent is used. By reducing the pH, the aldehydic tanning agent can be released, whereby a tanning step is initiated. The composition and the method are characterized by lower toxicity compared to conventional compositions and tanning methods based on aldehydic tanning agents. Furthermore, improved penetration of the tanning agents into deeper layers of the hide and/or the pelt is possible, so that particularly homogeneous tanning is achieved.
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公开(公告)号：US20160160301A1
公开(公告)日：2016-06-09
申请号：US14904722
申请日：2014-07-25
发明人： Jens FENNEN , Eric KIENTZ , Florian DÖPPERT , Nina SCHULTE
CPC分类号： C14C3/28 , C14C3/10 , C14C3/14 , C14C3/20 , C14C3/22 , C14C9/02 , C14C11/006 , D06P3/00 , C09D175/04 , C08L75/08
摘要： The present invention is directed to a process for retanning leather comprising the steps of: a) providing tanned or pre-tanned leather b) treating the tanned leather of step a) with a composition comprising hollow microspheres, preferably as an aqueous composition, the hollow microspheres have a true density of from 0.01 to 0.10 g/cm3 (25° C.) and/or a bulk density of the dry powder of 0.005 to 0.06 g/cm3 (25° C.), c) drying, whereby the temperature of the leather during drying does not exceed 75° C. as well as to leather obtained by said process.
摘要翻译： 本发明涉及一种复鞣皮革的方法，包括以下步骤：a）提供鞣制或预鞣皮革b）用包含中空微球体，优选作为水性组合物的组合物处理步骤a）的鞣制皮革， 微球具有0.01至0.10g / cm 3（25℃）和/或干粉末的堆积密度为0.005至0.06g / cm 3（25℃）的真密度，c）干燥，由此温度 的皮革在干燥过程中不超过75℃，以及通过所述方法获得的皮革。
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公开(公告)号：US20220127687A1
公开(公告)日：2022-04-28
申请号：US17311912
申请日：2019-12-09
IPC分类号： C14C15/00
摘要： The invention relates to a device for reducing the odor of tanned leather, comprising a treatment chamber, which is designed to dry tanned leather and/or treat dried leather, and at least one odor reducing reservoir, wherein the at least one odor reducing reservoir has at least one odor-neutralizing substance, and a gas-exchange connection is provided between the treatment chamber and the odor reducing reservoir.
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公开(公告)号：US10604813B2
公开(公告)日：2020-03-31
申请号：US16089523
申请日：2017-03-29
摘要： A composition including an acetal of an aldehydic tanning agent for tanning hides and/or pelts, as well as a method for tanning hides and/or pelts in order to produce leather, wherein an acetal of an aldehydic tanning agent is used. By reducing the pH, the aldehydic tanning agent can be released, whereby a tanning step is initiated. The composition and the method are characterized by lower toxicity compared to conventional compositions and tanning methods based on aldehydic tanning agents. Furthermore, improved penetration of the tanning agents into deeper layers of the hide and/or the pelt is possible, so that particularly homogeneous tanning is achieved.
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公开(公告)号：US10087497B2
公开(公告)日：2018-10-02
申请号：US14904722
申请日：2014-07-25
发明人： Jens Fennen , Eric Kientz , Florian Döppert , Nina Schulte
摘要： The present invention is directed to a process for retanning leather comprising the steps of: a) providing tanned or pre-tanned leather b) treating the tanned leather of step a) with a composition comprising hollow microspheres, preferably as an aqueous composition, the hollow microspheres have a true density of from 0.01 to 0.10 g/cm3 (25° C.) and/or a bulk density of the dry powder of 0.005 to 0.06 g/cm3 (25° C.), c) drying, whereby the temperature of the leather during drying does not exceed 75° C. as well as to leather obtained by said process.
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