GB790933A - Tanning, retanning and filling processes - Google Patents
Tanning, retanning and filling processesInfo
- Publication number
- GB790933A GB790933A GB22112/55A GB2211255A GB790933A GB 790933 A GB790933 A GB 790933A GB 22112/55 A GB22112/55 A GB 22112/55A GB 2211255 A GB2211255 A GB 2211255A GB 790933 A GB790933 A GB 790933A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mols
- formaldehyde
- compounds
- dicyandiamide
- mol
- 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
- C14C3/28—Multi-step processes
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)
- Compositions Of Macromolecular Compounds (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
Water-soluble cationic resins suitable for making leather are prepared by condensing organic nitrogen compounds containing amino or imino groups with oxo compounds. Specifically mentioned nitrogen compounds are urea, thiourea, methylenediurea, cyanamide, guanidine, alkylguanidines, dicyandiamide, dicyandiamidine guanamine, ammeline, ammelide and melamine. Oxo compounds specified are formaldehyde, acetaldehyde (or corresponding aldehyde-yielding compounds) acrolein, furfural and methylethylketone. Increased cationic character can be given to resins obtained from said components by further condensation with e.g. polyamino compounds such as polyalkylenepolyamines, e.g. triethylenetetramine, tetraethylenepentamine, hydroxyalkylamines such as dimethylaminoethanol, diethylamine, oxazolidine, and polyphenyldiguanides. Examples refer to the use of a resin consisting of 0.5 mols. of dicyandiamide, 0.5 mols. of guanidine hydrochloride and 3 mols. of formaldehyde; of 1 mol. of melamine and 3 mols. of formaldehyde; of 1 mol. of dicyandiamide and 5 mols. of formaldehyde; and of 1 mol. of guanylurea hydrochloride and 5.3 mols. of formaldehyde. Insoluble, neutral, salt-like compounds of these condensation products are produced in the leather by previously or subsequently treating it with a solution of a salt (e.g. an alkali metal, ammonia or organic base salt) of a polymeric silicic, phosphoric, acrylic or methacrylic acid.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE790933X | 1954-08-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB790933A true GB790933A (en) | 1958-02-19 |
Family
ID=6702654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22112/55A Expired GB790933A (en) | 1954-08-13 | 1955-08-02 | Tanning, retanning and filling processes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB790933A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2304999A1 (en) * | 1972-02-05 | 1973-08-09 | Stamicarbon | MELAMINE FORMALDEHYDE RESIN SOLUTIONS |
EP2580356A1 (en) * | 2010-06-14 | 2013-04-17 | Basf Se | Process for producing leather |
CN105803134A (en) * | 2014-12-29 | 2016-07-27 | 焦作隆丰皮草企业有限公司 | Sheep leather tanning method |
-
1955
- 1955-08-02 GB GB22112/55A patent/GB790933A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2304999A1 (en) * | 1972-02-05 | 1973-08-09 | Stamicarbon | MELAMINE FORMALDEHYDE RESIN SOLUTIONS |
EP2580356A1 (en) * | 2010-06-14 | 2013-04-17 | Basf Se | Process for producing leather |
EP2580356A4 (en) * | 2010-06-14 | 2014-01-01 | Basf Se | Process for producing leather |
CN105803134A (en) * | 2014-12-29 | 2016-07-27 | 焦作隆丰皮草企业有限公司 | Sheep leather tanning method |
CN105803134B (en) * | 2014-12-29 | 2017-10-10 | 焦作隆丰皮草企业有限公司 | A kind of process for tanning of sheepskin |
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