A printing or coating composition has a non-volatile liquid vehicle carrying a conductive polymer to be deposited on a substrate and is cleavable by heat or acidification without decomposition of said material, cleavage of said vehicle producing decomposition products that are more volatile than said vehicle and which can be evaporated to dry the composition. Suitably, that vehicle is a carbonic acid diester or a malonic acid diester, e.g. of the formula: wherein R
2
is an organic substituent such that R
2
—OH is a volatile alcohol; R1 is an aliphatic or aromatic substituent of more than three carbon atoms such that is volatile; and R
3
is C
1-3
alkyl.
一种印刷或涂覆组合物具有一种非挥发性液体载体,携带一种导电聚合物沉积在基板上,并可通过热或酸化剂裂解,而不分解该材料,裂解该载体会产生比该载体更挥发的分解产物,这些产物可以蒸发以使组合物变干。适当的是,该载体是
碳酸二酯或马隆酸二酯,例如,式中R2是一种有机取代基,使得R2—OH是一种挥发性醇;R1是一种具有超过三个碳原子的脂肪族或芳香族取代基,使得其挥发性;R3是C1-3烷基。