Heat-sensitive recording material
一种热敏记录材料、热敏记录的技术,应用在温度记录法、复制/标记方法、印刷等方向,能够解决起雾增加、颜色灵敏度降低等问题,达到高记录密度、背景起雾的发生少、优异记录灵敏度的效果
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[0051] The polyvalent isocyanate compound-containing polymeric component used in the preparation of the composite particles of the present invention is a compound that forms polyurea or polyurea-polyurethane by reacting with water, and may be a single polyvalent isocyanate compound, or a polyvalent isocyanate compound A mixture with a polyol reacted with it, or an adduct of a polyol and a polyvalent isocyanate compound, or a multimer such as a biuret body or an isocyanurate body of a polyvalent isocyanate.
[0052] Examples of polyvalent isocyanate compounds used in the present invention include m-phenylene diisocyanate, p-phenylene diisocyanate, 2,6-benzylidene diisocyanate, 2,4-benzylidene diisocyanate, naphthalene -1,4-diisocyanate, diphenylmethane-4,4'-diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, 5-isocyanato-1-(isocyanatomethyl) -1,3,3-trimethylcyclohexane, 3,3'-dimethyldiphenylmethane-4,4'-diisocyanate, xylylene-1,4-diisocyanate, m-tetramethyl Xylylene diisocyan...
Embodiment 1
[0125] Preparation of Composite Particle Dispersion Liquid (Liquid A) Containing Dye Precursor
[0126] As a dye precursor, 20 parts of 3-bis(n-butyl)amino-6-methyl-7-anilinofluoran was dissolved in 24 parts of dicyclohexylmethane-4,4'-bis Isocyanate (trade name: Desmodur (registered trademark) W; manufactured by Sumika Bayer Urethane Co., Ltd.). This solution was gradually added to 200 parts of an aqueous solution of 6% polyvinyl alcohol (trade name: Poval (registered trademark) PVA217EE; manufactured by Kuraray Co., Ltd.), using a homogenizer (trade name : T.K.ROBO MICS; manufactured by Tokushu Kika Kogyo Co., Ltd.) Stirring at 7,000 rpm for 2 minutes for emulsification and dispersion. Gained emulsion is heated to 90 DEG C, add 20 parts of polyethyleneimine (trade name: Epomin (registered trademark) SP-003) that has the branched structure that contains primary amine, secondary amine and tertiary amine and molecular weight is 300 as reaction accelerator ; manufactured by ...
Embodiment 2
[0134] A thermosensitive recording material was obtained in the same manner as in Example 1, except that, in the preparation of Liquid A, 20 parts of amines having a branched structure containing primary amines, secondary amines, and tertiary amines and having a molecular weight of 600 were used. A 10% aqueous solution of polyethyleneimine (trade name: Epomin (registered trademark) SP-006; manufactured by Nippon Shokubai Co., Ltd.) was used as a reaction accelerator instead of 20 parts having a branched structure containing primary, secondary, and tertiary amines. And a 10% aqueous solution of polyethyleneimine with a molecular weight of 300 (trade name: Epomin (registered trademark) SP-003; manufactured by Nippon Shokubai Co., Ltd.). At this time, the average particle diameter of the composite particles was 1.0 μm.
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