Disclosed is a method of coating comprising the steps of: (I) coating a substrate with one or more applications of a pigmented basecoating composition comprising a thermoplastic, non-crosslinked, film-forming polymer having at least two functional groups per molecule which functional groups are co-reactive with acid anhydride moieties, to which basecoating composition has been added within 24 hours prior to coating the substrate, a carboxylic acid anhydride component having at least two cyclic anhydride groups in an amount so as to provide a ratio of equivalents of anhydride groups to equivalents of the co-reactive functional groups of at least 0.10:1.00 to form a basecoat; and (II) coating the basecoat with one or more applications of a transparent, crosslinking, topcoating composition comprising a crosslinkable, film-forming material and a crosslinking agent for the crosslinkable, film-forming material to form a transparent topcoat.
本发明公开了一种涂层方法,包括以下步骤(I) 在基材上涂布一次或多次
颜料基涂层组合物,该组合物包括热塑性、非交联、成膜聚合物,其每个分子具有至少两个官能团,这些官能团与酸酐分子具有共反应性、在涂覆基底前 24 小时内,在该基底涂料组合物中加入至少具有两个环状酸酐基团的
羧酸酐组分,其用量应使酸酐基团与共反应官能团的当量比至少为 0.10:1.00 以形成底涂层;以及 (II) 在底涂层上涂覆一层或多层透明交联面涂层组合物,该组合物包含可交联成膜材料和用于可交联成膜材料的
交联剂,以形成透明面涂层。