摘要:
An aqueous suspension of a multivalent-metal-modified salicylic acid resin, which is suitable for use in the production of color-developing sheets for pressure-sensitive recording paper sheets, contains a specific multivalent-metal-modified salicylic acid resin at the first-mentioned resin. Fine particles of the specific multivalent-metal-modified salicylic acid is dispersed in an aqueous solution of a dispersant composed of at least one compound selected from the group consisting of:(a) water-soluble anionic high-molecular compounds composed of polyvinyl alcohol derivatives containing sulfonic acid groups in their molecules, and salts thereof,(b) acrylamide-modified polyvinyl alcohols, and(c) water-soluble anionic high-molecular compounds composed of polymers or copolymers comprising particular styrenesulfonic acid derivatives as their essential components.The aqueous dispersion is prepared by finely grinding the specific multivalent-metal-modified salicylic acid in the aqueous solution of the dispersant.
摘要:
A color-developing sheet for pressure-sensitive copying paper sheets is obtained using an aqueous suspension of a color-developing composition containing a multivalent metal salt of a salicylic acid resin obtained from a salicylic acid ester and a mixture of styrenes which include a styrene dimer, which aqueous suspension is obtained by finely wet-grinding the color-developing composition in the presence of at least one anionic, water-soluble, high-molecular weight substance selected from (a) polyvinyl alcohol derivatives containing at least one sulfonic acid group thereof and salts thereof and (b) polymers and copolymers containing as an essential component a styrenesulfonic acid salt.
摘要:
A color-developing composition comprises a multi-valent-metal-modified salicylic acid resin (Resin A) and a polycondensation resin (resin B) at a weight ratio of 90-30 to 10-70. Resin A is composed of 5-35 mole % of a structural unit (I) and 65-95 mole % of at least one structural unit (II) or 65-95 mole % of a coupled structural unit of at least one unit (II) and at least one unit (III) and has a weight-average molecular weight of 350-5,000. Resin B is composed of the unit (II) and/or the unit (III) and has a weight-average molecular weight of 350-5,000. ##STR1## wherein Z represents M/m, M being a metal ion of m valence and m being an integer; R.sub.1 and R.sub.2 represent H or a C.sub.1-12 alkyl, aralkyl, aryl or cycloalkyl group; R.sub.3 and R.sub.6 represent H or a C.sub.1-4 alkyl group; and R.sub.4 and R.sub.5 represent H or CH.sub.3.
摘要:
A color-developing composition comprises a multi-valent-metal-modified salicylic acid resin (Resin A) and a polycondensation resin (resin B) at a weight ratio of 90-30 to 10-70. Resin A is composed of 5-35 mole % of a structural unit (I) and 65-95 mole % of at least one structural unit (II) or 65-95 mole % of a coupled structural unit of at least one unit (II) and at least one unit (III) and has a weight-average molecular weight of 350-5,000. Resin B is composed of the unit (II) and/or the unit (III) and has a weight-average molecular weight of 350-5,000. ##STR1## wherein Z represents M/m, M being a metal ion of m valence and m being an integer; R.sub.1 and R.sub.2 represent H or a C.sub.1-12 alkyl, aralkyl, aryl or cycloalkyl group; R.sub.3 and R.sub.6 represent H or a C.sub.1-4 alkyl group; and R.sub.4 and R.sub.5 represent H or CH.sub.3.
摘要:
Heat-sensitive recording materials contain an electron-donating chromogenic compound and an electron-attracting compound. The recording materials also contain at least one compound represented by the following formula: ##STR1## wherein R.sub.1 and R.sub.3 mean a hydrogen atom or an alkyl, aralkyl or aryl group, R.sub.2 and R.sub.4 denote an alkyl, alkenyl, aralkyl or aryl group, X.sub.1, X.sub.2, Y.sub.1 and Y.sub.2 stand for an oxygen or a sulfur atom, and --Z.sub.1 -- and --Z.sub.2 -- are a specific aromatic group. Also provided are phenol compounds represented by the following formula: ##STR2## wherein R.sub.1, R.sub.2, X.sub.1 and Y.sub.1 have the same meanings as defined above; R.sub.5 and R.sub.6 are a hydrogen or halogen atom or an alkyl, alkoxy, aralkyl, aryl or hydroxyl group; p and q stand for an integer of 1-4; R.sub.5 and R.sub.6 may be either the same or different when p and q represent an integer of 2 or greater; and --Z.sub.3 -- means a specific divalent group.
摘要:
A heat-sensitive recording material comprising a color forming, electron donating compound and a salicylic acid derivative represented by the formula (1): ##STR1## wherein X.sub.1 and X.sub.2 are a hydrogen atom, an alkyl group, an alkoxy group, an aralkyl group, an aryl group or a halogen atom, Y.sub.1 and Y.sub.2 are an oxygen atom or a sulfur atom, R.sub.1 is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group , and R.sub.2 is an alkyl group, an alkenyl group, an aralkyl group or an aryl group, and/or a metal salt of the salicylic acid derivative as an electron accepting compound, is disclosed.
摘要:
A reversible thermochromic material, preferably in the form of a microcapsule, comprising:(a) an electron donative color former;(b) a sulfide, sulfoxide or sulfone containing a hydroxy phenyl radical; and(c) a chemical compound selected from alcohols, esters, ethers, ketones, carboxylic acids or acid amides,chromatizes very brightly and in a dense color, generates a change of chromic hue (colored - colorless) within a narrow temperature range and provides a stable thermochromatism on a long term basis.
摘要:
Heat-sensitive recording materials contain an electron-donating chromogenic compound and an electron-attracting compound. The recording materials also contain at least one compound represented by the following formula: ##STR1## wherein R.sub.1 and R.sub.3 mean a hydrogen atom or an alkyl, aralkyl or aryl group, R.sub.2 and R.sub.4 denote an alkyl, alkenyl, aralkyl or aryl group, X.sub.1, X.sub.2, Y.sub.1 and Y.sub.2 stand for an oxygen or a sulfur atom, and --Z.sub.1 -- and --Z.sub.2 -- are a specific aromatic group. Also provided are phenol compounds represented by the following formula: ##STR2## wherein R.sub.1, R.sub.2, X.sub.1 and Y.sub.1 have the same meanings as defined above; R.sub.5 and R.sub.6 are a hydrogen or halogen atom or an alkyl, alkoxy, aralkyl, aryl or hydroxyl group; p and q stand for an integer of 1-4; R.sub.5 and R.sub.6 may be either the same or different when p and q represent an integer of 2 or greater; and --Z.sub.3 -- means a specific divalent group.
摘要:
Disclosed herein is a novel benzoquinone derivative represented by the following general formula (I): ##STR1## wherein R.sub.1 means an alkyl or cycloalkyl group, R.sub.2 denotes an alkyl or cycloalkyl group, a phenyl group which may optionally contain one or more halogen atoms and/or alkyl, cycloalkyl, alkoxy, alkylene, phenoxy, phenyl and/or biphenylyl groups, or a benzyl or naphthyl group which may optionally contain one or more methyl groups. This compound is useful as an oxidative color-developing agent for recording materials.
摘要:
A process for the preparation of triarylmethane compounds which comprises reacting a benzene or naphthalene compound with a formylating agent for such compounds in the presence of an acid catalyst to form an aromatic aldehyde compound; adding water to the reaction mixture and thereby hydrolyzing the acid catalyst without isolating the aromatic aldehyde compound from the reaction mixture; and uninterruptedly condensing the aromatic aldehyde compound with an aromatic compound in the resulting mixture.