摘要:
The present invention provides a flame-retardant polycarbonate resin composition which is superior in flame retardancy and causes substantially no lowering in mechanical strength (such as impact resistance) which is inherent in a polycarbonate resin. The present invention provides a polycarbonate resin composition which includes (A) a polycarbonate resin, (B) an alkali metal salt or alkaline earth metal salt of an aromatic carboxylic acid, and (C) a fluorine-containing resin, and thereby the composition is superior in flame retardancy and various physical properties. Preferably, the salt of component (B) is an alkali metal salt of an aromatic carboxylic acid having from two to four carboxyl groups. Further, a flame retardant for a polycarbonate resin and a molded article of a polycarbonate resin are also provided.
摘要:
A process comprising the first step of reacting a phosphorus oxytrihalide with a bisphenol A derivative at a specific ratio to prepare a phosphorohalidate, the second step of removing unreacted phosphorus oxytrihalide, the third step of reacting the reaction product obtained in the second step with a monophenol at 120°C or below, and the fourth step of reacting the phosphorohalidate with a monophenol at 120°C or above. The condensed phosphoric esters obtained by this process are extremely lowered in the content of isopropenylphenyl diphenyl phosphate, which is causative of a lowering in the heat resistance of a resin and staining of molds occurring in molding a resin, when the condensed phosphoric ester is used as an additive for the resin.
摘要:
A process for the preparation of condensed phosphoric esters extremely lowered in volatiles content, which comprises the first step of reacting a phosphorus oxytrihalide with a bisphenol to prepare a phosphorohalidate, the second step of removing unreacted phosphorus oxytrihalide, and the third step of reacting the phosphorohalidate with a monophenol at a specific ratio.
摘要:
A process for the preparation of condensed phosphoric acid esters by using bisphenol A derivatives as the raw material, which can give high-purity condensed phosphoric acid esters little containing monomeric phosphoric acid esters which cause lowering in heat resistance and staining of molds when used as additives for resins. This process comprises reacting a bisphenol A derivative with a phosphorus oxytrihalide and a hydroxyl compound in the presence of a decomposition inhibitor.
摘要:
An objective of the present invention is to provide a method for preparing a high-purity, condensed phosphoric ester made of a bisphenol A derivative and having a very low content of monomer-type phosphoric ester that causes reduction in the heat resistance and the contamination of the molds during the molding when the condensed phosphoric ester is used as an additive for a resin. According to the present invention, a bisphenol A derivative, a phosphorus oxytrihalide and a hydroxy compound are reacted in the presence of a decomposition retardant, whereby the above problems can be solved.
摘要:
A condensed phosphoric ester having a very low content of isopropenyl phenyl diphenyl phosphate, which reduces heat resistance and causes the contamination of molds during the molding when the condensed phosphoric ester is used as an additive for a resin, is provided by a process including a first step of reacting a phosphorus oxytrihalide with a bisphenol A derivative at a specific ratio to prepare a phosphorohalidate; a second step of removing unreacted phosphorus oxytrihalide; a third step of reacting the reaction product obtained in the second step with a monophenol-based compound at a temperature equal to or lower than 120°C; and a fourth step of reacting the phosphorohalidate with the monophenol-based compound at a temperature equal to or higher than 120°C.
摘要:
A condensed phosphoric ester having a very low content of volatile components is provided by a process including a first step of reacting a phosphorus oxytrihalide with a bisphenol-based compound to prepare a phosphorohalidate; a second step of removing unreacted phosphorus oxytrihalide; and a third step of reacting the phosphorohalidate with a monophenol-based compound at a specific ratio.