PRODUCTION OF AQUEOUS POLYMER COMPOSITIONS

摘要

Process for making organic solvent-free aqueous cross-linkable polymer composition comprising: a) preparing an aqueous solution of an acid-functional oligomer with Tg 10 to 125 DEG C and having cross-linker functional groups; b) conducting an aqueous emulsion polymerisation to make an aqueous emulsion of an olefinic hydrophobic polymer in the presence of the aqueous oligomer solution, the hydrophobic polymer having Tg at least 25 DEG C below that of the oligomer and optionally crosslinker funtional groups, and c) combining with a crosslinking agent reactable with the crosslinker groups of the oligomer and polymer, said composition having Koenig hardness of >/= 40 sec. and minimum film forming temperature (MFFT)