| 摘要 |
PURPOSE: To improve reproducibility and resolution by using specific compds. in order to suppress the dissolution of a binder in an aq alkaline soln. CONSTITUTION: The good reproducibility and high resolution are obtd. by using the binder or binder mixture which is soluble in the aq. alkaline soln. and is the monoketal of a β-dicarbonyl compd. of formula I. In the formula I; R<1> and R<2> may be the same as or different from each other and respectively signify alkyl, cycloalkyl, aralkyl and, in some cases, aryl substd. with alkyl or halogen. R<2> signifies hydrogen, halogen, alkyl, cycloalkyl, aralkyl, and, in some cases, aryl substd. with alkyl or halogen. Or R<1> together with R<2> , R<1> with R<3> or R<3> with R<2> may form a 5- or 6-membered ring; R<4> and R<5> may be the same as or different from each other and respectively signify alkyl, cycloalkyl or aralkyl or R<4> and R<5> may combine to form a 5- or 5-membered ring. |
