METHOD AND SYSTEM FOR CONTINUOUS PHOTOMETRY OF PLASTIC MOLDING MATERIAL CONTINUOUSLY

    公开(公告)号:JPH10104078A

    公开(公告)日:1998-04-24

    申请号:JP17845597

    申请日:1997-07-03

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To determine variation in the color of a molten plastic quickly and accurately by introducing a light through a light emitting duct and a sensor head to a molten molding material and transmitting the light reflected therefrom to a spectrometer through a light receiving duct. SOLUTION: Uncolored plastic granules 1 and granules 2 containing a large quantity of coloring agent are fed an extruder 4 having two shafts turning simultaneously at same speed while meshing tightly and heated up to a temperature higher than the melting point while being mixed uniformly. An extrusion molding is delivered to a catcher 5. At the end of the extruder 4 mixed with the free ends of a light emitting duct 7 and a light receiving duct 9, a sensor head 6 projects into the extruder 4 through screw engagement. The light emitting duct 7 is coupled with a light source 8 and the light receiving duct 9 is coupled with a spectrometer 10. Pulse from the spectrometer 10 is delivered to an analyzer 11.

    6.
    发明专利
    未知

    公开(公告)号:DE19927125A1

    公开(公告)日:2000-06-08

    申请号:DE19927125

    申请日:1999-06-15

    Applicant: BASF AG

    Abstract: The invention relates to a shock-resistant polystyrene with a maximum caoutchouc content of 10 wt.- %. The polystyrene has a melt-volume flow rate MVR (200 DEG C/5 kg, measured according to ISO 1133) in the range of 8 to 12 cm /10 min and a Charpy impact test value (according to ISO 179/1eA, notch milled) in the range of 16 to 20 kJ/m .

    8.
    发明专利
    未知

    公开(公告)号:DE3682459D1

    公开(公告)日:1991-12-19

    申请号:DE3682459

    申请日:1986-08-12

    Applicant: BASF AG

    Abstract: Fire retardant polystyrene compsns. contg. (a) halogenated hydrocarbon flame retardant agents together with at least one of (b) a synergist for the (a), (c) stabilisers, (d) antioxidants and (e) additives, are made by a multistage mixing process comprising (1) premixing polystyrene with the (a) and part or all of the (c) at temps. up to 100 deg.C, (2) continuously feeding the premix into a continuously operating single or twin screw extruder or kneader, opt. together with further additives, (3) in a subsequent mixing zone of the extruder, feeding into the prod. stream a monomer- and solvent-free melt of a polystyrene resin at 200-250 deg.C, opt. together with other additives, and (4) extruding and granulating the resulting flame resistant polystyrene compsn..

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