Aqueous crosslinkable coating compositions

摘要

Aqueous-based corsslinkable coating composition comprising: (A) an aqueous dispersion of at least one hydroxyl-functional polyester oligomer in which: (i) said polyester has an average hydroxyl functionality of >/=2; (ii) said polyester incorporates chain pendant sulphonate anion groups which impart water-dispersibility thereto; (iii) said polyester has a number average molecular weight within the range of from 500 to below 1000,000; (iv) said aqueous dispersion is substantially free of any added amine or ammonia and any amine or ammonium cations; and (B) at least one organic polyisocyanate.