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    • 8. 发明授权
    • Color developer for pressure-sensitive recording sheets
    • 压敏记录纸的彩色显影剂
    • US5393332A
    • 1995-02-28
    • US164483
    • 1993-12-09
    • Toranosuke SaitoTakashi IshibashiEiji KawabataMasato TanakaToshio Kimura
    • Toranosuke SaitoTakashi IshibashiEiji KawabataMasato TanakaToshio Kimura
    • C07C51/15C07C65/10C09D11/00
    • C07C51/15
    • Herein disclosed is a method for preparing a nuclear-substituted salicylic acid or a metal salt thereof represented by the following general formula (1): ##STR1## [wherein R.sub.1 and R.sub.2 each represents a t-butyl group, a t-amyl group, a t-octyl group, an isononyl group or an isododecyl group, provided that at least one of R.sub.1 and R.sub.2 represents an isononyl group or an isododecyl group; M represents a hydrogen atom or a metal atom; and n is the atomic valency of the metal atom M] which comprises the step of subjecting, to a Kolbe-Schmitt reaction, an alkali metal salt of a nuclear-substituted phenol represented by the following general formula (2): ##STR2## [wherein R.sub.1 and R.sub.2 are the same as those defined above] in which 100 to 50% of the alkali metal salt is potassium salt and 0 to 50% thereof is sodium salt, in a substantially water-insoluble solvent as a reaction medium. The method makes it possible to improve the yield of the specific nuclear-substituted salicylic acid and metal salts thereof and to provide such products having high purity without any post-treatment. The compounds can be used in color developers for pressure-sensitive recording sheets without any additional purification treatment.
    • 本文公开了一种由以下通式(1)表示的核取代的水杨酸或其金属盐的制备方法:其中R1和R2各自表示叔丁基,t- 戊基,叔辛基,异壬基或异十二烷基,条件是R 1和R 2中的至少一个表示异壬基或异十二烷基; M表示氢原子或金属原子; 并且n是金属原子M的原子价,其包括以下通式(2)表示的核取代苯酚的碱金属盐进行Kolbe-Schmitt反应的步骤:< IMAGE> 2)[其中R1和R2与上述定义相同],其中100〜50%的碱金属盐为钾盐,0〜50%为钠盐,在基本不溶于水的溶剂中作为反应介质 。 该方法可以提高特定的核取代的水杨酸及其金属盐的产率,并提供具有高纯度的这种产品,而不需要后处理。 这些化合物可以用于彩色显影剂,用于压敏记录片材,而无需任何额外的纯化处理。
    • 9. 发明授权
    • Method for preparing aqueous dispersion of developer and
pressure-sensitive recording paper
    • 制备显影剂和压敏记录纸的水性分散体的方法
    • US5204190A
    • 1993-04-20
    • US905834
    • 1992-06-29
    • Toranosuke SaitoShigeru OdaTomoharu ShiozakiMasato Tanaka
    • Toranosuke SaitoShigeru OdaTomoharu ShiozakiMasato Tanaka
    • B41M5/155
    • B41M5/155Y10S428/913Y10T428/26Y10T428/31536Y10T428/31967Y10T428/31996
    • Herein disclosed are a method for preparing an aqueous developer dispersion which comprises the steps of dissolving, in an organic solvent, a developer which comprises a nuclear-substituted salicylic acid salt represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group having not more than 15 carbon atoms, a cycloalkyl group, a phenyl group, a nuclear-substituted phenyl group, an aralkyl group or a nculear-substituted aralkyl group, or two adjacent groups selected from R.sub.1 to R.sub.4 may be bonded together to form a ring; n is an integer of not less than 1; and M represents magnesium, calcium, zinc, aluminum, iron, cobalt, nickel or a basic ion thereof; emulsifying and dispersing the resulting solution in an aqueous solution of an acrylamide copolymer having a degree of polymerization of not less than 100 obtained by copolymerizing 96 to 70 mole % of acrylamide with 4 to 30 mole % of an alkyl or alkoxyalkyl, having not more than 4 carbon atoms, ester of acrylic acid, methacrylic acid, itaconic acid or maleic acid; then heating the emulsified dispersion to remove the organic solvent by distillation; and optionally finely wet-pulverizing the resulting aqueous dispersion to an extent that reduction in the average particle size of the developer dispersed in the dispersion does not exceed 10%; as well as pressure-sensitive recording paper obtained using the aqueous developer dispersion. The recording paper is substantially improved in the developing density, developing velocity and printability.
    • 本文公开了一种制备水性显影剂分散体的方法,其包括以下步骤:在有机溶剂中溶解包含由以下通式(I)表示的核取代的水杨酸盐的显影剂: 其中R1,R2,R3和R4可以相同或不同,表示氢原子,卤素原子,碳原子数不超过15个的烷基,环烷基,苯基,核取代的苯基 ,芳烷基或仲胺取代的芳烷基或选自R 1至R 4的两个相邻基团可以结合在一起形成环; n为不小于1的整数; M表示镁,钙,锌,铝,铁,钴,镍或其碱性离子; 将得到的溶液乳化分散在丙烯酰胺共聚物的水溶液中,聚丙烯酰胺共聚物的水溶液中聚合度不低于100,通过共聚96〜70摩尔%的丙烯酰胺与4〜30摩尔%的烷基或烷氧基烷基不同 4个碳原子,丙烯酸,甲基丙烯酸,衣康酸或马来酸的酯; 然后加热乳化分散液通过蒸馏除去有机溶剂; 并且任选地将得到的水分散体精细地湿粉碎至分散在分散体中的显影剂的平均粒径的降低不超过10%的程度; 以及使用含水显影剂分散体获得的压敏记录纸。 记录纸在显影密度,显影速度和可印刷性方面显着提高。