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US 5,623,045 AGranted
Process for the preparation of coatings
AssigneeBayer Aktiengesellschaft
InventorsChristian Zwiener, Reinhard Halpaap, Josef Pedain, Wolfgang Kiel
Life of this patent
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Abstract
A process for the preparation of coatings using a coating composition having a binder containing a two-component system of a) a polyisocyanate component and b) an isocyanate-reactive component b) which is essentially free from hydroxyl groups and contains b1) 5 to 95 parts by weight of a polyamine containing ester groups and secondary amino groups and b2) 5 to 95 parts by weight of polyketimines.
Claims11
A process for the preparation of coatings by coating a substrate with a coating composition having a two-component binder containing
- a) a polyisocyanate component and
- b) an isocyanate-reactive component which is essentially free of hydroxyl groups and contains
- b1) 5 to 95 parts by weight of compounds having the formula ##STR7## wherein X represents an n-valent radical which is inert towards isocyanate groups and obtained by removing the primary amino groups from an organic polyamine having a number average molecular weight (M.sub.n) of 60 to 6000 and containing n (cyclo)aliphatically bound amino groups,
- R.sup.1 and R.sup.2 represent the same or different alkyl radicals having 1 to 18 carbon atoms, n represents a whole number of at least 2
- and
- b2) 5 to 95 parts by weight of compounds having a number average molecular weight (M.sub.n) of 140 to 6500 and having at least two ketimine units per molecule corresponding to the formula ##STR8## wherein the sum of the parts by weight of components b1) and b2) is 100, based on the weight of component b1) and b2).
3 more elements
Dependencies are inferred from the claim text.