| 摘要 |
Hot melt ink composition comprises an oligourea, having a melting point of at least 65 DEG C and obtainable by reacting an aliphatic or aromatic mono- or diisocyanate with an at least stoichiometric amount of: (i) a primary or secondary monoamine component; or (ii) a primary or secondary monoamine component followed by another different primary monoamine component; or (iii) a primary or secondary monoamine component, followed by a diprimary diamine component followed by a primary or secondary monoamine component; or (iv) a primary or secondary monoamine component, followed by an alcohol component; the diprimary diamine component being used in an amount of not more than 50% of the stoichiometric amount of amine groups required to react with the isocyanate group(s) on the diisocyanate, together with a colourant. |
