ONE- OR TWO-PACKAGE POLYURETHANE COATING MATERIAL

One- or two-component polyurethane coating materials (PUCM), contg. at least one component which is reactive towards polyisocyanates, contain a cpd. (A) with a NCO gp., a urethane, thiourethane or urea gp. and two capped gps. which are reactive towards isocyanate. Also claimed are (i) addition prods. of 1 mole di-isocyanate and 1 mole of a dioxolane or dioxan cpd., and (ii) substrates coated with PUCM. Cpd. (A) is the addition prod. of 1 mole di-isocyanate and 1 mole of a cpd. of formula (I), in which R , R = H or 1-10C alkyl; X, Y = O, S or NR ; R = 1-5C alkylene, and the heterocyclic ring may be substd. with other gps. R and R , where one of the gps. R , R or R is or contains a NCO-reactive gp. such as OH, SH or prim. or sec. amino, and the others (if present) contain no NCO-reactive gps. Pref. (I) are dioxolanes of formula (II), dioxans of formula (III) or oxazolidine derivs. of formula (IV), in which R , R , R = H or 1-10C alkyl; R = 1-30C aliphatic or aromatic residue substd. with a NCO-reactive gp. such as OH, SH or prim. or sec. amino, and opt. contg. ether gps. in the aliphatic type. 1-100 wt% of the reactive component in the PUCM consists of cpds. (A).