C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 163/00 (2006.01) B05D 5/00 (2006.01) C08G 59/04 (2006.01) C08G 59/06 (2006.01) C08J 7/04 (2006.01) C09D 123/28 (2006.01)
Patent
CA 2142688
Aqueous coating composition based on one or more water-borne, self-emulsifying epoxy resins, which coating composition optionally contains pigments, extenders and customary lacquer additives, the coating composition containing A) 1 to 40 wt.% of one or more water-borne self-emulsifying epoxy resins with an epoxy equivalent weight of 250 to 10,000, which may be obtained by condensation of a) 50 to 80 wt.% of one or more epoxy compounds with an average of at least 2 epoxy groups per molecule and an epoxy equivalent weight of 100 to 2,000, b) 17 to 35 wt.% of one or more aromatic polyols and c) 3 to 15 wt.% of a condensation product prepared from one or more aliphatic polyols with a weight-average molecular weight (Mw) of 200 to 20,000 and one or more epoxy compounds with an average of at least 2 epoxy groups per molecule and an epoxy equivalent weight of 100 to 2,000, wherein the equivalent ratio of OH groups to epoxy groups is 1:0.85 to 1:1.5 and the epoxy equivalent weight of this condensation product is at least 50,000, B) one or more chlorinated polyolefins (CPO) in a weight ratio of epoxy resin (component A):CPO (component B) of 10;0.5 to 10:4.5, in each case relative to the weight of resin solids, C) 40 to 90 wt.% of water, - 2 - D) 3 to 30 wt.% of one or more organic solvents, wherein the weight percentages of A), C) and D) relate to the weight of the complete aqueous coating composition and the coating composition contains no crosslinking agents. The coating composition is particularly suitable for repair lacquer coating in the automotive sector.
Hellman Udo
Prescher Michael
Schreiber Peter
Stephan Werner
Herberts Gesellschaft Mit Beschrankter Haftung
Kirby Eades Gale Baker
LandOfFree
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