C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
117/113, 400/741
C08G 18/38 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C09D 5/44 (2006.01) F23N 3/04 (2006.01) F23N 5/14 (2006.01) F23N 5/18 (2006.01)
Patent
CA 1257736
AQUEOUS SOLUTIONS OR DISPERSIONS OF CATIONIC OLIGO- URETHANES, A PROCESS FOR THE PRODUCTION THEREOF AND THE USE THEREOF TO PRODUCE COATINGS ABSTRACT OF THE DISCLOSURE The present invention is directed to aqueous solu- tions or dispersions which may contain blocked polyiso- cyanates of cationic oligourethanes which are cross- linkable at elevated temperature and contain a) about 0.1 to 3% by weight of ternary or quaternary ammonium ions introduced through Michael adducts of secondary amines having at least one hydroxyl group and specific acrylic acid derivatives, b) up to about 2.8Z by weight of tert. amino nitrogen atoms incorporated through Michael adducts of secondary amines having at least one hydroxyl group and specific acrylic acid derivatives and c) about 0 to 15% by weight of blocked isocyanate groups, provided that the ternary ammonium groups of (a), the tert. nitrogen atoms of (b) and the blocked isocyanate groups are present in an equivalent ratio of (a + b): blocked isocyanate groups of about 1:1 to 1:1.5. The present inven- tion is additionally directed to a process for the preparation of these solutions or dispersions of oligourethanes and to their use for coating heat resistant substrates, particularly by coating metallic substrates by cathodic electrodeposition and subsequently cross-linking these coatings at elevated temperature.
474412
Noll Klaus
Pedain Josef
Potter Terry
Schwindt Jurgen
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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