Invention Grant
- Patent Title: Tanning process for obtaining leather
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Application No.: US15025854Application Date: 2014-09-30
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Publication No.: US10731230B2Publication Date: 2020-08-04
- Inventor: Wagner Célio Ferraz Lourenço
- Applicant: TECHPOLYMERS INDUSTRIA E COMERCIO Ltda
- Applicant Address: BR Sao Bernardo do Campo
- Assignee: TECHPOLYMERS INDUSTRIA E COMERCIO Ltda
- Current Assignee: TECHPOLYMERS INDUSTRIA E COMERCIO Ltda
- Current Assignee Address: BR Sao Bernardo do Campo
- Agency: Osha Liang LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@5949d843
- International Application: PCT/IB2014/001956 WO 20140930
- International Announcement: WO2015/044765 WO 20150402
- Main IPC: C14C3/06
- IPC: C14C3/06 ; C14C1/08

Abstract:
The invention concerns a process for tanning hide to obtain leather. The general process for obtaining the intermediary wet blue stage comprises the following steps: a) a picking step with acid and salt, followed by b) a tanning step with chromium salt, followed by c) a basification step. The invention is characterized in that the bath of the pickling step comprises organic acids selected from 2-Methyl glutaric acid (MGA), ethyl succinic acid (ESA) and mixture thereof instead of the traditional strong acid, generally sulfuric acid This process requires less basification agent and enables an increase of the up-taking of the re-tanning products. This invention provides leather with improved mechanical properties.
Public/Granted literature
- US20160244854A1 TANNING PROCESS FOR OBTAINING LEATHER Public/Granted day:2016-08-25
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