| 摘要 |
<p>PURPOSE: To obtain an ink having excellent ink performances and biodegradability. CONSTITUTION: This biodegradable ink contains (A) a biodegradable polyester, containing 80-100mol% lactic acid residues therein and having 1-9 molar ratio (L/D) of the L-lactic acid to D-lactic acid, 0.4-1.5dl/g reduced viscosity (ηsp /C) and 35-60 deg.C Tg, (B) an ink pigment and (C) a solvent. Furthermore, the biodegradable ink contains residues of a hydroxy acid other than lactic acid, succinic acid, propylene glycol or glycerol in the biodegradable polyester (A).</p> |
