초록 ▼

The present invention also relates to a process for preparing these polyisocyanates adducts, to blends of the polyisocyanate adducts with other polyisocyanates that do not contain fluorine and to the use of the polyisocyanate adducts or polyisocyanate blends, optionally in blocked form, in one- or t

The present invention also relates to a process for preparing these polyisocyanates adducts, to blends of the polyisocyanate adducts with other polyisocyanates that do not contain fluorine and to the use of the polyisocyanate adducts or polyisocyanate blends, optionally in blocked form, in one- or two-component coating compositions.

대표청구항 ▼

[ What is claimed is:] [1.] A polyisocyanate adduct containing allophanate groups, fluorine and optionally isocyanurate groups that is prepared by reacting a compound a) whichi) is substantially free of hydroxyl groups and isocyanate groups,ii) has an average of at least two urethane groups per mole

[ What is claimed is:] [1.] A polyisocyanate adduct containing allophanate groups, fluorine and optionally isocyanurate groups that is prepared by reacting a compound a) whichi) is substantially free of hydroxyl groups and isocyanate groups,ii) has an average of at least two urethane groups per molecule andiii) contains 0 to 50% by weight of fluorine, based on the weight of the polyisocyanate adduct, h an excess quantity, based on the equivalents of urethane groups, of a polyisocyanate b), which optionally contains fluorine, to form a polyisocyanate adduct and optionally removing at least a portion of the unreacted excess polyisocyanate b), provided that compound a) and polyisocyanate b) contain a total of at least 0.001% by weight, of fluorine, based on the weight of the polyisocyanate adduct.