Thermoplastic resin composition, its forming body and machine frame body thereof
A technology of thermoplastic resin and composition, which is applied in the field of thermoplastic resin composition, can solve the problems of rising cost, poor balance of mechanical strength and fluidity, etc., and achieve the effects of improved welding appearance, excellent flame retardancy and formability
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manufacture example 1
[0200] Production Example 1 [Synthesis of polytetramethylene glycol-bis(4-hydroxybenzoate)]
[0201] Under a nitrogen atmosphere, 100 parts by mass of polytetramethylene glycol (PTMG, Mn (number average molecular weight) = 1,000) and 33.4 parts by mass of methylparaben were mixed in the presence of 0.5 parts by mass of dibutyltin oxide at 220°C. Heated and distilled off methanol.
[0202] The inside of the reaction system was reduced in pressure, and excess methyl p-hydroxybenzoate was distilled off. 5.0 parts by mass of the reaction product were dissolved in 30 parts by volume of dichloromethane. 10 parts by volume of an 8% by mass aqueous sodium bicarbonate solution was added to the methylene chloride solution, and the mixture was vigorously mixed for 20 minutes, and then the methylene chloride phase was collected by centrifugation. The dichloromethane phase was concentrated under reduced pressure to obtain a phenol-modified diol, namely polytetramethylene glycol-bis(4-hyd...
manufacture example 2
[0209] Production Example 2 [Synthesis of polytetramethylene glycol-bis(4-hydroxybenzoate)]
[0210] In Production Example 1, except that polytetramethylene glycol (Mn=2,000) was used instead of polytetramethylene glycol (Mn=1,000), the same method as Production Example 1 was used to obtain polytetramethylene glycol-di(4-hydroxybenzoic acid ester).
manufacture example 3
[0211] Production example 3 (manufacture of polycarbonate copolymer)
[0212] (1) PC oligomer synthesis process
[0213] To the sodium hydroxide aqueous solution with a concentration of 5.6% by mass, add sodium dithionite which is 2000 mass ppm relative to the bisphenol A (BPA) dissolved subsequently, dissolve BPA therein so that the concentration of BPA is 13.5% by mass, and prepare the hydroxide solution of BPA. sodium solution. In a tubular reactor with an internal diameter of 6mm and a tube length of 30m, the aqueous sodium hydroxide solution of the above-mentioned BPA is continuously fed with a flow rate of 40L / hr and dichloromethane is continuously fed with a flow rate of 15L / hr. The flow rate of hr is continuously fed into carbonyl chloride. The tubular reactor has a jacket part, and the temperature of the reaction liquid is kept below 40° C. by passing cooling water into the jacket.
[0214] The reaction solution sent out from the tubular reactor is continuously int...
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