GB628741A - Improvements in or relating to the tanning of leather - Google Patents

Improvements in or relating to the tanning of leather

Info

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
Application number
GB12343/46A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHN R EVANS AND Co
Original Assignee
JOHN R EVANS AND Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JOHN R EVANS AND Co filed Critical JOHN R EVANS AND Co
Publication of GB628741A publication Critical patent/GB628741A/en
Expired legal-status Critical Current

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.
GB12343/46A 1945-09-07 1946-04-24 Improvements in or relating to the tanning of leather Expired GB628741A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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