PREPARATION METHOD FOR POLYCARBONATE RESIN COMPOSITION

    公开(公告)号:US20180355177A1

    公开(公告)日:2018-12-13

    申请号:US15735920

    申请日:2016-05-24

    Abstract: Provided is a method of producing a polycarbonate-based resin composition, comprising using a polycarbonate-based resin containing a polycarbonate-polyorganosiloxane copolymer (A) as a raw material, and the step incorporating at least one of a styrene-based resin (B), a flame retardant (C), a flame retardant aid (D), and an inorganic filler (E) into the resin, wherein the copolymer having the following features: the copolymer has a specific polycarbonate block (A-1) and a specific polyorganosiloxane block (A-2); and in a differential molecular weight distribution curve obtained from measurement of the polyorganosiloxane block (A-2) by gel permeation chromatography using the polystyrene calibration curve, the curve having the axis of abscissa indicating a logarithmic value log(M) of a molecular weight M and the axis of ordinate indicating dw/d log(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight, (1) a dw/d log(M) value becomes maximum in a range of 3.4≤log(M)≤4.0, and (2) a ratio of a value obtained by integrating the dw/d log(M) value over the range of 4.00≤log(M)≤4.50 to a value obtained by integrating the dw/d log (M) value over the entire range of the log(M) in the differential molecular weight distribution curve is 6 to 40%:

    Process for producing polycarbonate

    公开(公告)号:US10059800B2

    公开(公告)日:2018-08-28

    申请号:US15534995

    申请日:2015-12-10

    CPC classification number: C08G64/24 C08G64/186 C08G77/448

    Abstract: A method of producing a polycarbonate, including: introducing a tertiary amine into a reaction process; and performing interfacial polycondensation between an alkali aqueous solution of a dihydric phenol and phosgene in the presence of an organic solvent, in which: (i) a portion into which the tertiary amine is introduced comprises at least a tertiary amine storage tank, a tertiary amine supply pipe, and a diluent solvent supply pipe; (ii) the portion further includes a pressure control valve in the tertiary amine supply pipe on an upstream side of a merging portion with the diluent solvent supply pipe; and (iii) when a pressure P1 of an inside of the tertiary amine storage tank pressurized by a pressurization gas and a pressure P2 in a portion ranging from an outlet of the storage tank to an upstream side of the pressure control valve, a relationship of P1≤P2 is satisfied.

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