Aqueous dispersions, containing hydrazine derivatives, of carbonyl-containing copolymers

• US 4,250,070 A
• Filed: 01/16/1979
• Issued: 02/10/1981
• Est. Priority Date: 01/26/1978
• Status: Expired due to Term

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Ley, Gregor, Penzel, Erich, Bott, Kaspar, Rebafka, Walter
• Primary Examiner(s): Hoke, V. P.
• Application Number:
  US06/003,965
• Time in Patent Office: 756 Days
• Field of Search: 260/29.6 MM, 260/29.6 MN, 260/45.9 NN, 525/376
• US Class Current: 524/555
• CPC Class Codes: C08K 5/24 Derivatives of hydrazine
• CPC Class Codes: C08L 101/06 containing oxygen atoms C08L101/025 takes precedence
• CPC Class Codes: C08L 33/04 Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: C14C 11/003 using macromolecular compounds

Abstract

Aqueous dispersions of carbonyl-containing copolymers, which dispersions contain from 0.02 to 1 mole, per mole of carbonyl group, of organic hydrazine derivatives possessing 2 or more hydrazine radicals, and from 0.0002 to 0.02 mole, per mole of the hydrazine derivatives, of heavy metal ions give coatings, impregnations and finishes which are particularly easy to cross-link.

Claims

1. An aqueous dispersion of a copolymer of olefinically unsaturated monomers containing keto and/or aldehyde ##STR6## groups, which dispersion contains as a crosslinking agent for the keto and/or aldehyde groups of the copolymer from 0.02 to 1 mole of an organic hydrazine derivative from the group consisting of dihydrazides of aliphatic dicarboxylic acids of 2 to 10 carbon atoms and bis-semi-carbazides of the general formula ##STR7## in which R is an aliphatic radical of 2 to 7 carbon atoms or a carbocyclic radical of 6 to 8 carbon atoms, and from 0.0002 to 0.02 mole of heavy metal ions per mole of the hydrazine derivative.

2. The dispersion of claim 1 which contains from 0.0002 to 0.02 mole of copper, iron, manganese, vanadium, zinc, lead and/or cobalt ions per mole of a dihydrazide of an aliphatic dicarboxylic acid of 2 to 10 carbon atoms.