C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 51/06 (2006.01) B29C 47/00 (2006.01) B29C 47/10 (2006.01) C08K 3/40 (2006.01) C08L 23/12 (2006.01) C08L 51/04 (2006.01)
Patent
CA 2078751
ABSTRACT OF THE DISCLOSURE According to the present invention, there is provided a process for stably producing a compositely reinforced polypropylene resin composition having less warpage deformation and good moldability. The present invention is directed to a process for producing a compositely reinforced polypropylene resin composition containing 10% by weight or more of a glass fiber and 20% by weight or more of a lamellar inorganic filler and having melt flow rate of 10 g/10 minutes (230°C, 10 minutes and a load of 2.16 kg) which is characterized by comprising the steps of using an extruder having three feed inlets, feeding a polypropylene modified by grafting an unsaturated organic acid thereonto, a mixture of resulting modified polypropylene and on unmodified polypropylene, or a mixture of an unsaturated organic acid, an unmodified polypropylene and an organic peroxide, to the extruder through the first feed inlet of the extruder, feeding the lamellar inorganic filler thereto through the second feed inlet disposed at a position where the resin mixture is sufficiently melted and kneaded, feeding the glass fiber thereto through the third feed inlet, and then melting and kneading these materials.
Atsumi Nobukazu
Takei Hiroshi
Yonaiyama Rikio
Yoshimitsu Minoru
Chisso Corporation
Macrae & Co.
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