| 摘要 |
PROBLEM TO BE SOLVED: To obtain a paper softener which provides paper with excellent flexibility and excellent printability without reducing paper strength. SOLUTION: The paper softener comprises a specific compound (a) and an alkyl ketene dimer (b) at a mass ratio of the compound (a) to the alkyl ketene dimer (b) of 60/40-95/5. COPYRIGHT: (C)2008,JPO&INPIT
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