申请人:AGFA-GEVAERT
naamloze vennootschap
公开号:EP0643326A1
公开(公告)日:1995-03-15
New types of polymer latices and their use in photographic materials are disclosed. They are obtained by subjecting to radical emulsion polymerisation one or more radical-polymerisable monomers, whose emulsifier-free homopolymers or copolymers possess a glass transition temperature below 65 °C, preferably below 30 °C, in the presence of a water-soluble polymer of a particular chemical formula.
These new types of latices are preferably used in graphic arts contact materials, e.g. daylight materials They can be used in relative high amounts thus improving dimensional stability without deteriorating the scratch resistance too strongly.
A preferred radical-polymerisable monomer mixture comprises n.-butyl acrylate, methyl methacrylate and acrylic acid.
本发明公开了新型聚合物乳液及其在照相材料中的应用。它们是通过将一种或多种可自由基聚合的单体进行自由基乳液聚合而得到的,这些单体的无乳化剂均聚物或共聚物在特定化学式的水溶性聚合物存在下,其玻璃化温度低于 65 °C,最好低于 30 °C。
这些新型乳胶可用于印刷接触材料,如日光材料,它们的用量相对较高,从而提高了尺寸稳定性,同时又不会使抗划伤性过于恶化。
首选的可自由基聚合的单体混合物包括丙烯酸正丁酯、甲基丙烯酸甲酯和丙烯酸。