Abstract:
The present invention discloses a decolorizable toner wherein a cationic dye having absorbance from the visible region to the near infrared region is contained in a binder resin together with a decolorant and anti-discoloration agent. In addition, the present invention also discloses a production process of a decolorizable toner that contains a step wherein cationic dye having absorbance from the visible region to the near infrared region, decolorant, binder resin and anti-discoloration agent are uniformly dissolved or dispersed in an organic solvent to prepare a mixed solution; a step wherein the solvent is removed from this mixed solution followed by drying; and, a step wherein the resulting dried mixture is pulverized to produce a toner.
Abstract:
A sheet of paper, plastic or the like on which an image has been formed using a toner that is photochemically decolorizable by absorption of near infrared rays is illuminated with near infrared rays under the state wherein the image is heated to a temperature equal to or higher than the glass-transition temperature of a binding resin of the toner. The color of the toner can thereby be easily and rapidly eliminated. This enables the reuse of the sheet to be realized easily and at a low cost.
Abstract:
A fluoran derivative useful for a heat-sensitive recording material, having the following general formula I; ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, stand for an alkyl group having 1 to 9 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, a phenyl group or a phenyl group substituted by an alkyl group having 1 to 4 carbon atoms, and R.sub.3 and R.sub.4, which may be the same or different, stand for an alkyl group having 1 to 6 carbon atoms or a phenyl group or R.sub.3 and R.sub.4 may form a 5- to 8-membered cycloalkane together with the carbon atom to which they are bonded.
Abstract:
The present invention relates to epoxy resin coating composition which comprises, at least, epoxy resin, a thiol-type curing agent and a curing assistant, being composed of two liquids of liquid (A) containing epoxy resin and a thiol-type curing agent and liquid (B) containing a curing assistant, which liquids are mixed just before using, wherein the thiol-type curing agent contains a branched compound containing a thiol group (P), which compound is an ester of polyhydric alcohol with thiol group-containing carboxylic acid represented by formula (1) HOCO(CH2)nCR1R2SH (1) (in the formula, R1 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms, R2 represents a linear or branched alkyl group having 1 to 10 carbon atoms, and n represents an integer of 1 to 4), which exhibits a suitable pot life, excellent curability particularly at low and ordinary temperature and low toxicity.
Abstract:
There is provided a method of molding which is capable of more highly precisely molding a molded article to be molded such as a lens than conventional technologies.A molded article such as a lens array and a mold for nanoimprinting is molded by repeating multiple times a transfer step including: a transformation step of bringing a light curable composition containing a compound having a polymerizable functional group and a polymerization initiator into contact with a transfer member 62 on which a transfer shape portion shaped equally to or reversely to an aspherical lens portion 312 is formed to transform the light curable composition to the transfer shape of the transfer member 62; a curing step of irradiating at least a transformed portion of the transformed light curable composition with light by a light irradiation unit 60 to cure the light curable composition; and a separation step of separating the cured light curable composition and the transfer member.
Abstract:
An object of the present invention is to provide a novel photobase generator which can sensitively generate a base even by h-ray in place of a conventional 2-nitro-4,5-dimethoxybenzyloxycarbonylamine compound. Disclosed is an N-(α-aromatic group-substituted-2-nitro-4,5-dialkoxybenzyloxycarbonyl)amine compound represented by the following general formula (I). (In the above formula (I), R1 to R9 denote specific groups.)
Abstract:
It is an object of the present invention to provide a urethane compound capable of providing a cured product which is excellent in surface hardness, scratch resistance, flexibility and bending property, has reduced curling property and also has good transparency, a curable composition containing the same and a cured product thereof. The curable composition of the present invention is characterized by containing a specific urethane compound having an isocyanurate ring skeleton and a polymerization initiator.
Abstract:
(1) A metal oxide dispersion for a dye-sensitized solar cell, which contains metal oxide fine particles, a binder composed of a polymer compound having an action to bind to the fine particles and a solvent; (2) a method for producing a photoactive electrode for a dye-sensitized solar cell by coating a dispersion containing the above-mentioned binder and metal oxide fine particles on a sheet-shaped electrode; (3) a photoactive electrode for a dye-sensitized solar cell, obtained by the method, which electrode has metal oxide containing the above-mentioned binder and metal oxide fine particles; and (4) a dye-sensitized solar cell with the above-mentioned photoactive electrode. According to the present invention, a porous metal oxide film can be formed without performing sintering at high temperatures, so that a flexible, inexpensive dye-sensitized solar cell can be obtained in which a resin material which has high transparency, is inexpensive and light in weight and has freedom in shape can be used as a sheet-shaped electrode substrate.
Abstract:
An ultraviolet and/or visible light curing photopolymerizable composition comprising as essential components: (a) a thermoplastic polymer obtained by copolymerization of at least one monomer selected from among .alpha.,.beta.-unsaturated carboxyl group-containing monomers and another monomer, (b) a crosslinking monomer with at least two ethylenic unsaturated groups per molecule and (c) an ultraviolet and/or visible light polymerization initiator comprising a quaternary boron salt and a sensitizing dye, as well as a dry film resist containing the composition as its main component.
Abstract:
A decolorizable toner including a resin binder, a near infrared ray-absorbing dye, a decolorizing agent and a light fastness stabilizer, and a process for preparing the decolorizable toner, which includes the steps of mixing the near infrared ray-absorbing dye and the light fastness stabilizer with the resin binder, and then mixing the decolorizing agent therewith. The decolorizable toner has excellent light stability during its production or storage and excellent decolorizing property.