LEATHER OR LEATHER ARTICLE AND METHOD FOR PRODUCING SAME, HEXAVALENT CHROMIUM TREATMENT AGENT, METHOD FOR TREATING HEXAVALENT CHROMIUM IN CRUDE LEATHER OR CRUDE LEATHER ARTICLE
申请人:Citizen Watch Co., Ltd.
公开号:EP3178947A1
公开(公告)日:2017-06-14
An object of the invention is to provide a heat-resistant hexavalent chromium removal agent, which is capable of remaining in a leather or leather article for a long period of time and stably detoxifying hexavalent chromium over the long term even when a leather or leather article contains hexavalent chromium, and a leather or leather article, in which the hexavalent chromium content is less than 3 ppm. The leather or leather article of the present invention contains at least: an organic compound (A) having a structure shown in chemical formula (1) and hydroxyphenyl but not aldehyde and carboxyl, which organic compound has a property to reduce hexavalent chromium to trivalent chromium; and trivalent chromium, and the hexavalent chromium content determined in accordance with ISO 17075: 2008-02 is less than 3 ppm.
本发明的目的是提供一种耐热的六价铬去除剂,即使皮革或皮革制品中含有六价铬,该去除剂也能在皮革或皮革制品中长期存留,并长期稳定地对六价铬进行解毒,同时提供一种六价铬含量低于 3ppm 的皮革或皮革制品。本发明的皮革或皮革制品至少含有:一种有机化合物(A),其结构如化学式(1)所示,具有羟基苯基,但不具有醛和羧基,该有机化合物具有将六价铬还原为三价铬的特性;以及三价铬,且根据 ISO 17075: 2008-02 测定的六价铬含量低于 3 ppm。
METHOD FOR PRODUCING REPTILE LEATHER OR LEATHER PRODUCT USING HEXAVALENT CHROMIUM TREATMENT AGENT, AND REPTILE LEATHER OR LEATHER PRODUCT USING HEXAVALENT CHROMIUM TREATMENT AGENT
申请人:Citizen Watch Co., Ltd.
公开号:EP3409795A1
公开(公告)日:2018-12-05
Provided is a method for producing a reptile leather, in which a leather can be treated with a hexavalent chromium treatment agent in the course of leather production without change in the visual appearance of the leather. The method for producing a reptile leather according to the present invention comprises: a chrome tanning step of performing chrome tanning on reptile skin to obtain a leather; a dyeing-fatliquoring step of performing dyeing and fatliquoring simultaneously on the leather subjected to the chrome tanning; and a finishing step of performing finishing on the leather subjected to the dyeing and fatliquoring, the method further comprising a hexavalent chromium treatment step of, prior to the finishing step, applying a hexavalent chromium-reducing compound capable of reducing hexavalent chromium into trivalent chromium to the leather subjected to the chrome tanning in the chrome tanning step.
Leather or leather article and method for producing same, hexavalent chromium treatment agent, method for treating hexavalent chromium in crude leather or crude leather article
申请人:CITIZEN WATCH CO., LTD.
公开号:US10358686B2
公开(公告)日:2019-07-23
An object of the invention is to provide a heat-resistant hexavalent chromium removal agent, which is capable of remaining in a leather or leather article for a long period of time and stably detoxifying hexavalent chromium over the long term even when a leather or leather article contains hexavalent chromium, and a leather or leather article, in which the hexavalent chromium content is less than 3 ppm. The leather or leather article of the present invention contains at least: an organic compound (A) having a structure shown in chemical formula (1) and hydroxyphenyl but not aldehyde and carboxyl, which organic compound has a property to reduce hexavalent chromium to trivalent chromium; and trivalent chromium, and the hexavalent chromium content determined in accordance with ISO 17075: 2008-02 is less than 3 ppm.
本发明的目的是提供一种耐热的六价铬去除剂,即使皮革或皮革制品中含有六价铬,该去除剂也能在皮革或皮革制品中长期存留,并长期稳定地对六价铬进行解毒,同时提供一种六价铬含量低于 3ppm 的皮革或皮革制品。本发明的皮革或皮革制品至少含有:一种有机化合物(A),其结构如化学式(1)所示,具有羟基苯基,但不具有醛和羧基,该有机化合物具有将六价铬还原为三价铬的特性;以及三价铬,且根据 ISO 17075: 2008-02 测定的六价铬含量低于 3 ppm。
Hexavalent chromium treatment agent and leather or leather article produced using the same
申请人:CITIZEN WATCH CO., LTD.
公开号:US10648048B2
公开(公告)日:2020-05-12
Provided is a hexavalent chromium treatment agent capable of penetrating inside of a leather and capable of reducing not only hexavalent chromium present in the vicinity of the surface of the leather but also hexavalent chromium present inside the leather into trivalent chromium. The hexavalent chromium treatment agent of the present invention comprises a hexavalent chromium-reducing compound capable of reducing hexavalent chromium into trivalent chromium, a nonionic surfactant, and an aqueous solvent. The hexavalent chromium-reducing compound preferably comprises an organic compound (A) that has a specific structure capable of acting to reduce hexavalent chromium into trivalent chromium, that has a hydroxyphenyl group, and that has no aldehyde groups and no carboxyl groups.