GB628741A - Improvements in or relating to the tanning of leather - Google Patents
Improvements in or relating to the tanning of leatherInfo
- Publication number
- GB628741A GB628741A GB12343/46A GB1234346A GB628741A GB 628741 A GB628741 A GB 628741A GB 12343/46 A GB12343/46 A GB 12343/46A GB 1234346 A GB1234346 A GB 1234346A GB 628741 A GB628741 A GB 628741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- melamine
- tanned
- skins
- leather
- tanning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/18—Chemical tanning by organic agents using polycondensation products or precursors thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
628,741. Tanning leather. EVANS & CO., J. R. April 24, 1946, No. 12343. Convention date, Sept. 7, 1945. [Class 76] Animal skins, which may be previously pickled, are tanned by an aqueous solution containing 1-12 per cent free melamine on the basis of the wet weight of the skins, and more than one, but less than three, mols. free formaldehyde per mol. of melamine, the melamine and formaldehyde remaining substantially unreacted at the beginning of the process, the resulting solution having a pH of 4-5.5, and the action being continued for 3-21 hours. Chrome-tanned leather may also be retanned without previous detanning. Several examples are given, referring inter alia to the presence of salt, sodium acetate, acetic acid, and (in one example), basic zirconium acetate in the tanning liquor, and to subsequent fat-liquoring of the tanned skins with a mixture of raw neatsfoot oil and sulphonated oil, and pigmenting with clay and titanium dioxide. Specification 569,419 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US628741XA | 1945-09-07 | 1945-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB628741A true GB628741A (en) | 1949-09-05 |
Family
ID=22045411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12343/46A Expired GB628741A (en) | 1945-09-07 | 1946-04-24 | Improvements in or relating to the tanning of leather |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB628741A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1005234B (en) * | 1954-07-07 | 1957-03-28 | St Lawrence Corp Ltd | Process for tanning skins and skins |
DE1024675B (en) * | 1954-04-03 | 1958-02-20 | Bayer Ag | Process for the production of amphoterically modified tanning agents of vegetable origin |
-
1946
- 1946-04-24 GB GB12343/46A patent/GB628741A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1024675B (en) * | 1954-04-03 | 1958-02-20 | Bayer Ag | Process for the production of amphoterically modified tanning agents of vegetable origin |
DE1005234B (en) * | 1954-07-07 | 1957-03-28 | St Lawrence Corp Ltd | Process for tanning skins and skins |
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