摘要:
A cyclic organic phosphorus compound useful as a stabilizer and a fire retardant for organic substances, particularly, high molecular weight compounds is provided, which compound is expressed by the formula (I): ##STR1## and further a process for producing the above compound (I) is provided, which process comprises reacting a compound expressed by the formula (II): ##STR2## with 1,4-benzoquinone.
摘要:
Phosphorus-containing condensation products are obtained by effecting condensation between an organophosphorus compound of the Formula, ##STR1## wherein X, Y and Z each is hydrogen or halogen, R.sub.1 and R.sub.2 each is hydrogen or methyl and R.sub.3 is hydrogen or an alkyl group and polyhydric alcohols having at least three alcoholic hydroxyl groups.These condensation products are ueful as a flame retardant for various synthetic resins.
摘要:
Alkali metal salts or/and alkaline earth metal salts of cyclic phosphorus compounds expressed by the general formula ##STR1## (wherein X.sub.1 to X.sub.8 each represent hydrogen, halogen, cyano group, acyl group, alkyl group, halogen-substituted alkyl group, aryl group, halogen-substituted aryl group or aralkyl group) are provided. These metal salts impart a specific flame retardancy to organic high molecular weight compounds prepared from alkylidenebisphenols as a raw material, without lowering the characteristic properties of substrates.
摘要:
Herein disclosed is a method for preparing a nuclear-substituted salicylic acid or a metal salt thereof represented by the following general formula (1): ##STR1## [wherein R.sub.1 and R.sub.2 each represents a t-butyl group, a t-amyl group, a t-octyl group, an isononyl group or an isododecyl group, provided that at least one of R.sub.1 and R.sub.2 represents an isononyl group or an isododecyl group; M represents a hydrogen atom or a metal atom; and n is the atomic valency of the metal atom M] which comprises the step of subjecting, to a Kolbe-Schmitt reaction, an alkali metal salt of a nuclear-substituted phenol represented by the following general formula (2): ##STR2## [wherein R.sub.1 and R.sub.2 are the same as those defined above] in which 100 to 50% of the alkali metal salt is potassium salt and 0 to 50% thereof is sodium salt, in a substantially water-insoluble solvent as a reaction medium. The method makes it possible to improve the yield of the specific nuclear-substituted salicylic acid and metal salts thereof and to provide such products having high purity without any post-treatment. The compounds can be used in color developers for pressure-sensitive recording sheets without any additional purification treatment.
摘要:
Herein disclosed are a method for preparing an aqueous developer dispersion which comprises the steps of dissolving, in an organic solvent, a developer which comprises a nuclear-substituted salicylic acid salt represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group having not more than 15 carbon atoms, a cycloalkyl group, a phenyl group, a nuclear-substituted phenyl group, an aralkyl group or a nculear-substituted aralkyl group, or two adjacent groups selected from R.sub.1 to R.sub.4 may be bonded together to form a ring; n is an integer of not less than 1; and M represents magnesium, calcium, zinc, aluminum, iron, cobalt, nickel or a basic ion thereof; emulsifying and dispersing the resulting solution in an aqueous solution of an acrylamide copolymer having a degree of polymerization of not less than 100 obtained by copolymerizing 96 to 70 mole % of acrylamide with 4 to 30 mole % of an alkyl or alkoxyalkyl, having not more than 4 carbon atoms, ester of acrylic acid, methacrylic acid, itaconic acid or maleic acid; then heating the emulsified dispersion to remove the organic solvent by distillation; and optionally finely wet-pulverizing the resulting aqueous dispersion to an extent that reduction in the average particle size of the developer dispersed in the dispersion does not exceed 10%; as well as pressure-sensitive recording paper obtained using the aqueous developer dispersion. The recording paper is substantially improved in the developing density, developing velocity and printability.
摘要:
The present invention provides a color developer composition characterized in that the composition contains a color developer comprising as its main component a nucleus-substituted salicylic acid salt represented by the formula (1) given below, and at least one amide compound selected from the group consisting of the compounds of represented by the formula (2) and formula (3) given below. ##STR1## wherein R.sub.1 to R.sub.10 are as defined in the specification.
摘要:
An engineering plastic composition with excellent flowability, heat stability, and desirable mechanical properties is provided. The composition comprises an engineering plastic material and at least one p-quaterphenyl derivative of specific formula.
摘要:
There is provided a process of producing p-benzoquinone, wherein hydroquinone and hydrogen peroxide are reacted in water, an aqueous inorganic acid solution, an inert organic polar solvent or a mixture of water with an inert organic polar solvent in the presence of a catalyst selected from the group consisting of iodine, hydrogen iodide, and iodine compounds of metals.According to the process, p-benzoquinone can be obtained from hydroquinone with the yield and the quality of the p-benzoquinone being high without requiring any special facilities, equipments and operations.
摘要:
In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the basic dye to form a color when contacted therewith, the recording material characterized in that at least one compound represented by the formula �I! is contained in a heat-sensitive recording layer ##STR1## wherein X is --O-- or --COO--, R.sub.1 to R.sub.4 are each hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl having 6 to 10 carbon atoms, aralkyl having 7 to 9 carbon atoms, chlorine atom, acetyl, propionyl, methoxy, methylthio, methoxycarbonyl, cyano, nitro or cyclohexenyl, substituents R.sub.1 and/or R.sub.2 or substituents R.sub.3 and R.sub.4 may link together to form aromatic ring(s), n is an integer of 1 to 10.
摘要:
A method for preparing a sulfone represented by the following formula: ##STR1## wherein R' represents a lower alkyl group, an aryl group or an aryl group whose nucleus has at least one substituent selected from the group consisting of a halogen atom, nitro group, a lower alkyl group, phenyl group and a phenyl group substituted with a halogen atom, or an alkali metal salt thereof. A sulfonic acid ester of 4-hydroxybiphenyl is condensed at a temperature of 0.degree. to 200.degree. C. in a presence of a Lewis acid or a super-strong acid with a sulfonyl chloride represented by the formula R'SO.sub.2 Cl, wherein R' is the same as that defined above.