RU96106899A

RU96106899A - METHOD FOR OBTAINING SALT-CONTAINING BISMUTH COMPOSITIONS AND THEIR APPLICATION AS CATALYTIC COMPONENTS IN CATHODO SEDICATED VARNISHES FOR ELECTROLACATION BY DIP

Info

Publication number: RU96106899A
Application number: RU96106899/13A
Authority: RU
Inventors: Феола Роланд; Бургманн Бригитте; Курцманн Франц
Original assignee: Вианова Ресинс АГ
Priority date: 1993-09-07
Filing date: 1994-09-02
Publication date: 1998-07-20

Claims

1. A method of obtaining compositions containing salts of bismuth to catalyze the crosslinking reactions of cationic lacquer binders, characterized in that
A) 1.0 mol of bismuth oxide is gradually introduced into the interaction with a total of 4.0 moles of lactic acid, and
Aa) first 1.0 mol of bismuth oxide and 2.0 mol of lactic acid in the presence of water are homogenized at 20-40 ° C for 30-60 minutes,
Ab) obtained by paragraph Aa). after addition of 1.0 mol of lactic acid, the mixture is again homogenized at 30-40 ° C for 30-60 minutes and
A) repeat the process of paragraph AB), and homogenize until the color of the reaction mixture changes from initially yellow to white;
B) then the mixture of bismuth lactate and bismuth lactate obtained by Aa) -Av) is combined with a cationic lacquer binder, the bismuth content, based on the total solids content in the composition, is 25–45 wt.%, Preferably 30–40 wt.% .

2. The method according to p. 1, characterized in that in paragraph B) use stitched due to the transesterification, and / or transamidation, and / or reurethanization, and / or by reaction of terminal double bonds cationic lacquer binders, preferably pigment paste resin, moreover, the compositions preferably have a viscosity in the range of 4000 - 10000 MPa • s at 23 ° C.

3. Application obtained by PP. 1 and 2 compositions, if necessary in the form of pigment pastes, in combination with stitched due to transesterification, and / or transamidation and / or reurethanization, and / or by the reaction of terminal double bonds with cationic lacquer binders, which are identical or different from those contained in the composition of the lacquer binder and, if necessary, are in the form of dispersions, for the preparation of the composition of cathodically deposited varnishes for electropacking by immersion, with the bismuth content in them, based on the solid matter content CTBA the overall coating binder, is 0.5 - 3.0 wt%, preferably 0.8 -. 2.5 wt.%.

4. Cathode-deposited varnishes for electroplating by immersion with a bismuth content calculated on the solids content of the entire lacquer binder, 0.5 to 3.0 wt.%, Preferably 0.8 to 2.5 wt.%, Which contain the resulting pp 1 and 2 compositions, if necessary in the form of pigment pastes, as well as others, crosslinked by transesterification, and / or transamination, and / or reurethanization, and / or by the reaction of terminal double bonds, cationic lacquer binders, and they are identical or different from contained in the composition of the lacquer binder and, if necessary, are in the form of dispersions.