申请人:——
公开号:US20040241598A1
公开(公告)日:2004-12-02
The developer for a thermal recording material of the present invention comprises a condensed composition consisting of, of condensates represented by the formula (1):
1
wherein R is a hydrogen atom, a hydroxyl group, a lower alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, an aryl group or an aralkyl group, R in the number of m may be the same or different and m is an integer of 0-3, X and Y are each a hydrogen atom, an alkyl group or an aryl group, provided that at least one of X an dY is an alkyl group or an aryl group, and n is an integer of 0-3, a condensate having two cores wherein n=0 or a condensed composition comprising a condensate having two cores wherein n=0 as a main component, and at least one kind of condensate of the formula wherein n=1-3 (3-5 core condensate). The developer for thermal recording materials of the present invention is applied to a heat-coloring layer of thermal recording materials, along with a basic dye (preferably further with a sensitizer).
According to the present invention, a developer for thermal recording materials, which is capable of realizing a thermal recording material capable of affording high colored image density and superior in preservation stability (particularly heat resistance and moisture resistance) of recorded images and non-image areas, while satisfying recent requirements for high sensitivity, can be obtained.
本发明的热敏记录材料显影剂包括由式(1)表示的缩合物组成的缩合组合物:
1
其中R是氢原子、羟基、具有1至5个碳原子的低级烷基、具有1至5个碳原子的烷氧基、芳基或芳烷基,m个数中的R可以相同或不同,且m是0-3的整数,X和Y各自是氢原子、烷基或芳基,条件是X和dY中至少有一个是烷基或芳基,且n是0-3的整数,具有两个芯的缩合物,其中n&等于;0 的缩合物,或由具有两个芯(其中 n=0 为主要成分)的缩合物和至少一种式中 n=1-3 的缩合物(3-5 芯缩合物)组成的缩合组合物。本发明的热敏记录材料用显影剂与碱性染料(最好再加上敏化剂)一起应用于热敏记录材料的热着色层。
根据本发明,可以获得一种用于热敏记录材料的显影剂,这种显影剂能够实现一种热敏记录材料,这种热敏记录材料能够提供高彩色图像密度,并且在记录图像和非图像区域的保存稳定性(特别是耐热性和防潮性)方面具有优势,同时还能满足最近对高灵敏度的要求。