Polymerisation process for production of polymer microparticles of high refractive index and coating compositions containing them
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0031997A1
公开(公告)日:1981-07-15
The production is described of polymer microparticles, which may optionally be crosslinked, by dispersion polymerisation in aliphatic hydrocarbon liquid of a monomer mixture which comprises up to 50%of styrene or a substituted derivative thereof and up to 50% by weight of a derivative of maleic acid or fumaric acid which is soluble in the hydrocarbon liquid at the polymerisation temperature. The microparticles have a high refractive index and are suitable for incorporation in coating compositions which are based on a film-forming polymer, such as a thermosetting acrylic resin or an alkyd resin, containing a significant proportion of aromatic residues, and which are intended to be used either unpigmented or when containing only light-absorbing pigments.
聚合物微粒的生产方法是在脂肪烃液体中分散聚合一种单体混合物,这种单体混合物包括高达 50% 的苯乙烯或其取代衍生物,以及高达 50% 的马来酸或富马酸衍生物(在聚合温度下可溶于烃液体)。这种微粒具有高折射率,适用于加入以成膜聚合物(如热固性丙烯酸树脂或醇酸树脂)为基料的涂料组合物中,这种成膜聚合物含有相当比例的芳香族残留物,用于未着色或仅含有光吸收颜料的情况。