COLOR-FORMING RECORDING MATERIAL
    5.
    发明专利

    公开(公告)号:CA2052738A1

    公开(公告)日:1992-04-05

    申请号:CA2052738

    申请日:1991-10-03

    Abstract: A color-forming recording material containing: (a) an aromatic diamine, (b) an oxidizing agent such as a quinoid type electron-accepting compound, and (c) an acidic substance such as an aromatic carboxylic acid. The araomatic diamine (a) has preferably the formula (1), .........(1) wherein each o-f R1 and R4 Is, independently of the other, a substituted or unsubstituted aryl group, each of R2 and R3 is, independently of the other, a hydrogen atom, a lower alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group, and X is a substituted or unsubstituted arylene group, or the formula (2), .............(2) wherein R1, R2, R3 and X are as defined in the -formula (1), and R is an alkyl group, an aryl group or an aralkyl group. The color-forming recording material is useful for use in a data reading apparatus using visible light and/or near infrared light.

    PROCESS FOR PREPARING HYDROXYNAPHTHALENES

    公开(公告)号:CA1278314C

    公开(公告)日:1990-12-27

    申请号:CA546695

    申请日:1987-09-11

    Abstract: Disclosed in accordance with the present invention are processes for the preparation of hydroperoxides and/or carbinols by liquid phase oxidation of secondary alkylsubstituted naphthalenes with molecular oxygen, wherein the oxidation reaction is carried out by dissolving in the reaction mixture containing the secondary alkylsubstituted naphthalenes at least 0.5 ppm in terms of metal, based on the starting secondary alkyl-substituted naphthalenes, of at least one compound of metal selected from the group consisting of palladium and gold, said metal compound being soluble in the reaction mixture of the secondary alkyl-substituted naphthalenes. When compared with the prior art processes using catalysts of non homogeneous system, therefore, not only the amount of catalyst used can be minimized but also the rate of oxidation can be enhanced, and hence there can be obtained in a short period of time hydroperoxides and/or carbinols in high yields which are the oxidation products in accordance with the present invention. According to the present invention, the desired hydroperoxide can be obtained in high yields as well as in high purity from the hydroperoxides and/or carbinols obtained in the manner as mentioned above.

Patent Agency Ranking