GB936560A - - Google Patents
Info
- Publication number
- GB936560A GB936560A GB936560DA GB936560A GB 936560 A GB936560 A GB 936560A GB 936560D A GB936560D A GB 936560DA GB 936560 A GB936560 A GB 936560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- urea
- sulphonic acid
- synthetic tannin
- dimethylol
- 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.)
- Active
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
- C14C3/20—Chemical tanning by organic agents using polycondensation products or precursors thereof sulfonated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
936,560. Sulphonated condensation products. BADISCHE ANILIN- & SODA-FABRIK A.G. Feb. 7, 1962 [Feb. 10, 1961], No. 4646/62. Class 2(5) A tanning agent is made by reacting (a) 1 part of a synthetic tannin containing a sulphonic acid group, an aromatic ring system and chemically combined urea, with (b) 1-20 parts of a water-soluble condensation product of at least one compound containing one or more primary and/or secondary amino or amido groups and formaldehyde. Reaction may be effected in the presence of a small amount of formaldehyde. Reactant (a) may be a synthetic tannin as described in Specifications 478,280 or 890,150. The nitrogen-containing component of reactant (b) may be urea, a substituted urea, N,N<SP>1</SP>-ethyleneurea, N,N<SP>1</SP>- propyleneurea, crotonylidene urea, a 5-alkylhexahydro-1,3,5-triazinone-(2), a ureide, melamine, dicyandiamide or butanediol diurethane. Condensation of these nitrogen-containing compounds with formaldehyde is effected in a neutral or weakly alkaline medium and, if desired, in the presence of a bisulphite whereby water-solubilizing sulphonic acid groups are introduced. In examples, a synthetic tannin obtained by condensing phenol sulphonic acid, urea and formaldehyde and condensing the product with formaldehyde and either phenol or 4,4<SP>1</SP>-dihydroxydiphenyl sulphone is reacted with (1) a urea-formaldehyde condensate, (2) trimethylol melamine, (3) dimethylol dicyandiamide, and (4) dimethylol glyoxalmonoureine. The products are spray-dried.
Publications (1)
Publication Number | Publication Date |
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GB936560A true GB936560A (en) |
Family
ID=1753811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB936560D Active GB936560A (en) |
Country Status (1)
Country | Link |
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GB (1) | GB936560A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3852374A (en) * | 1971-11-26 | 1974-12-03 | Basf Ag | Tanning agents |
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0
- GB GB936560D patent/GB936560A/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3852374A (en) * | 1971-11-26 | 1974-12-03 | Basf Ag | Tanning agents |
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