发明名称 |
PROCESS FOR THE PROVISION OF A PLANT EXTRACT CONTAINING CONDENSED TANNINS, WITH ASTRINGENT CHARACTERISTICS, MODIFIED BY COPOLYMERIZATION, FOR USE IN TANNING AND RETAINNING OF SKINS, A PLANT EXTRACT WITH ASTRINGENT CHARACTERISTICS, MODIFIED BY COPOLYMERIZATION, AND USE OF A MODIFIED PLANT EXTRACT CONTAINING TANNINGS |
摘要 |
A process for obtaining a plant extract containing condensed tannins, with astringent characteristics, and modified by copolymerization, produces a material suitable for the tanning and retanning of skins. The process includes adding water to a reactor, adding a copolymerization agent, adding thioglycolic acid and allowing to react, adjusting pH, mixing a powdered extract of a plant or tannin to a desired concentration, raising the temperature, adding sodium bisulfite, and keeping the reaction heated and at pressure for about 4 hours.
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申请公布号 |
US6955826(B2) |
申请公布日期 |
2005.10.18 |
申请号 |
US20030446109 |
申请日期 |
2003.05.28 |
申请人 |
TANAC S.A. |
发明人 |
LAMB LUIZ HENRIQUE;DECUSATI OTAVIO |
分类号 |
C14C3/10;C14C3/12;(IPC1-7):A61K35/78 |
主分类号 |
C14C3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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