| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P1-65112
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P3-3008 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06P3-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06P1-651 |
| filingDate |
1980-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_605098fa8d7511a72978b6577853d700
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6f1affaf50051c37db158fcafd92433
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2800e423ce926435c7c052fa5c960719 |
| publicationDate |
1981-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-3001301-A1 |
| titleOfInvention |
METHOD FOR PREPARING ANIONICALLY TANNED OR RE-TANED LEATHER |
| abstract |
Treatment of anionically tanned or retanned leather prior to dyeing with anionic dyes in aq. soln. is carried out by treating the leather with a NH4 salt (I) and an aldehyde or dialdehyde (II) at a pH of 3-8 (pref. 4.5-6). (I) is suitably (NH4)2SO4, NH4Cl or NH4 formate or acetate. (II) is pref. glutaraldehyde. The treatment is pref. effected at 20-70 (esp. 40-50) deg.C for 10-120 (esp. 20-50) min using 50-200%, based on leather wt., of an aq. soln. contg. (I) and (II) in a (I):(II) equiv. ratio of 1-2:1. The amt. of (I) used is pref. equiv. to 1.5-3 wt.% (NH4)2SO4, based on leather wt. The treatment improves the depth of colour achievable with anionic dyes, giving intense even shades with good fastness. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6916348-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6251414-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0220897-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0554217-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-10044642-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0554216-A1 |
| priorityDate |
1980-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |