p-Hydroxybenzoic acid derivatives represented by formula (I),
(wherein R represents an alkyl group having 2 or more carbon atoms or an aralkyl group, and Y represents a sulfur atom or sulfonyl group) have bactericidal and fungicidal activities and are useful as bactericides and fungicides. Further they are useful as intermediates for plasticizers, synthetic resins, dyes, functional polymers, antioxidants, etc.
由式(I)代表的对羟基苯甲酸衍生物(其中 R 代表具有 2 个或多个碳原子的烷基或芳烷基,Y 代表硫原子或磺酰基)具有杀菌和杀真菌活性,可用作杀菌剂和杀真菌剂。 此外,它们还可用作增塑剂、合成树脂、染料、功能性聚合物、抗氧化剂等的中间体。
Silver halide colour photographic material and cyan coupler of the 2-phenylureido-5-acylaminophenol type
申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP0423764A2
公开(公告)日:1991-04-24
There is disclosed a silver halide color photographic material having a silver halide emulsion layer on a base which comprises a novel cyan coupler. According to the disclosure, a silver halide color photographic material containing a cyan coupler that has high coupling reactivity and high color density, resulting color image being hardly susceptible to reduction fading and is excellent in heat fast can be obtained.
Thermochromic solid having reversibly invisible/visible construction enclosed therein
申请人:THE PILOT INK CO., LTD.
公开号:EP1095996A1
公开(公告)日:2001-05-02
A solid has a reversibly invisible/visible thermochromic internal construction enclosed therein which is composed of a solid made of a transparent resin and a fluorescent internal construction showing the internal structure of the solid enclosed therein, wherein a reversible thermochromic layer containing a reversible thermochromic composition is formed on the surface of the solid, or the transparent resin contains a reversible thermochromic composition.
[Object] To provide a reversibly thermochromic composition free from accidental discoloration by heat conducting from the opposite side writing surface or by self-heating due to quick writing; and also to provide a solid writing material and a writing ink composition comprising that composition.
[Means to solve the problem] A reversibly thermochromic composition comprising a combination of: (a) a reversibly thermochromic component capable of being discolored or decolored by heat and (b) a component for controlling heat conducting to the reversibly thermochromic component; and also a solid writing material and a writing ink composition comprising that composition.