Process for retanning leather with acrylic-based oligomers
CA 1192703 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Wurmli, Albert; Lauton, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for retanning leather with acrylic-based oligomers Abstract of the Disclosure, Known oligomers containing structural units of the formulae, and optionally , and -SO3M1, wherein X1 is -CN -COOR1, -OOCR2 or -CONHR3, Y1 is -COOH or -COOM2, Y2 is -CONH2, -CH2OH, -OCH3 or -OC2H5 each of, Z1, Z2 and Z3 is hydrogen, methyl or ethyl each of M1 and, M2 is an amine cation, an ammonium cation or an alkali metal cation, and each of R1, R2 and R3 is C1-C8alkyl C1-C8-, hydroxyalkyl or alkoxyalkyl containing altogether at most 8 carbon atoms, are suitable for use as tanning agents in a process for retanning chrome-tanned leather. The oligomers are prepared by copolymerising comonomers of the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2002.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.