Flatting agents

摘要

Silica flatting agents having improved flatting and settling characteristics and which impart improved mar resistance to certain coatings are prepared by treating a silica hydrogel in the absence of dispersion or emulsifying agents with up to 14 parts by weight of specific mixtures of microcrystalline waxes and synthetic waxes in the respective ratios of from 1:1.5 to 1:12.