Process for dressing leather by a treatment using rubber...

Details Process for dressing leather by a treatment using rubber... Process for dressing leather by a treatment using rubber...

C - Chemistry, Metallurgy

14

C

117/200

C14C 11/00 (2006.01)

Patent

CA 1142817

A Process for Dressing Leather by a Treatment Using Rubber Latices Abstract of the Disclosure Advantages in the dressing of leather, especially of split leather, with a synthetic rubber latex are obtained if in the leather dressing, the rubber latex is reacted with from 0.5 to 50 % by weight, based on solid rubber, of one or more oxides and/or hydroxides of one or more bivalent metals and the leather is treated with a non-polymerised rubber latex which is produced in a one-stage process up to a monomer con- version of from 70 to 95 % by weight, by emulsion polymeri- sation of : (A) from 1 to 10 parts by weight of one or more .alpha.,.beta.-monoethylenically saturated aliphatic carboxylic acids; and (B) from 90 to 99 parts by weight of a mixture of a) from 10 to 90 parts by weight of one or more acylic conjugated dienes having from 4 to 9 carbon atoms; and b) from 10 to 90 parts by weight of one or more vinyl aromatics having from 8 to 12 carbon atoms and/or acrylonitrile and/or methacrylonitrile, whereby the quantity of acrylonitrile and/or methacrylonitrile in the mixture amounts to a maximum of 50 parts by weight. Le A 19 983

364730

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