C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
117/195, 400/742
C08L 75/06 (2006.01) B05D 7/26 (2006.01) C08G 18/42 (2006.01) C08G 18/62 (2006.01) C08G 18/63 (2006.01) C08L 33/14 (2006.01)
Patent
CA 1078986
ABSTRACT OF THE DISCLOSURE The subject of the invention is a process for the pro- duction of coatings from polyhydroxy compounds, based on copoly- mers containing hydroxyl groups, and polyisocyanates in solvents having no active hydrogen atoms, by shaping whilst removing the solvent. The copolymers which are used according to the invention give lower viscosities than the known copolymers. These less viscous copolymer solutions exhibit a better absorption of pig- ment both when using inorganic or organic pigments. The reactive lacquer manufactured therefrom produce high-gloss films. The films of the reactive lacquers used in the process of the invention have the following advantages: better resistance to solvents, higher abrasion resistance and better resistance to weathering in the Florida climate. In addition, the copoly- mers used according to the invention, when combined with poly- isocyanates and diluted as described give lacquers of higher solids content. By the invention, an acrylic resin is provided, contain- ing hydroxyl groups, which, in combination with polyisocyanates, gives the binder foundation for air-drying lacquers and also stoving lacquers which are suitable for top coats of lacquer in the automobile industry; the top lacquer being located directly on top of the stove? primer of electro-coating lacquer or another suitable primer. - 1 -
279206
Dalibor Horst
Kiessling Hans-Joachim
Quednau Peter
Hoechst Aktiengesellschaft
Na
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