폴리에스테르-폴리아민 분산제의 합성 및 카본 분산 특성
Synthesis of Polyester-Polyamine Dispersants and Their Carbon Dispersing Properties
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We prepared polyester-polyamines to improve the effect of carbon black dispersibility for use in thermaltransfer ink, and synthesized polymeric dispersing agents by two-step reactions. In the first step, we madepolyester by polycondensing 1,6-hexanediol and adipic acid. The resulting polymers had carboxylic acid, whichwas linked with polyamine via an acid-base reaction. We then characterized the polyester-polyamine structureby NMR spectroscopy and Fourier transform infrared spectroscopy (FT-IR). We also determined the basic characterizationssuch as total acid numbers (TAN) (5.0−67.5 mgKOH/g), hydroxyl values (27.1−67.5 mgKOH/g),and molar masses (Mn = 1.6−8.4 kg mol−1) for the polyester and total base numbers (TBN) (15.3−57.1mgKOH/g), hydroxyl values (33.0−79.8 mgKOH/g), and nitrogen contents (1.02−3.48%) for the polyesterpolyaminepolymers. We thus prepared thermal transfer ink using carbon blacks and the polyester-polyamine dispersingagents, and evaluated the resulting mixtures for printability, adhesive force, storage stability, ink appearance,ink gloss, and processability. These mixtures showed significant dispersibility for carbon black in the ink. Thus, we concluded that the dispersibility of the polymeric materials depended on the polyamine structure andthe hydrophilicity-hydrophobicity distribution of the polymeric dispersants.
Abstract
We prepared polyester-polyamines to improve the effect of carbon black dispersibility for use in thermaltransfer ink, and synthesized polymeric dispersing agents by two-step reactions. In the first step, we madepolyester by polycondensing 1,6-hexanediol and adipic acid. The resulting polymers had carboxylic acid, whichwas linked with polyamine via an acid-base reaction. We then characterized the polyester-polyamine structureby NMR spectroscopy and Fourier transform infrared spectroscopy (FT-IR). We also determined the basic characterizationssuch as total acid numbers (TAN) (5.0−67.5 mgKOH/g), hydroxyl values (27.1−67.5 mgKOH/g),and molar masses (Mn = 1.6−8.4 kg mol−1) for the polyester and total base numbers (TBN) (15.3−57.1mgKOH/g), hydroxyl values (33.0−79.8 mgKOH/g), and nitrogen contents (1.02−3.48%) for the polyesterpolyaminepolymers. We thus prepared thermal transfer ink using carbon blacks and the polyester-polyamine dispersingagents, and evaluated the resulting mixtures for printability, adhesive force, storage stability, ink appearance,ink gloss, and processability. These mixtures showed significant dispersibility for carbon black in the ink. Thus, we concluded that the dispersibility of the polymeric materials depended on the polyamine structure andthe hydrophilicity-hydrophobicity distribution of the polymeric dispersants.
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