Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Hironori Suezawa

Kiyoshi Kawakami

Junji Seki

Takeshi Ikematsu

Hiroshi Shirai

A process for producing a styrenic resin with a small content of low molecular weight components, comprising a continuous anionic polymerization process wherein a raw material system having the following composition (A) is continuously fed, either collectively or in a divided manner, from one end of a reactor tank R1 having a back mixing flow and the product system is continuously discharged from the other end of the reactor tank R1, the internal temperature of the reactor tank R1 being controlled to a range of 40-120&deg; C., the average proportion of styrene monomers to the sum total of the styrene monomers, hydrocarbon solvent and styrenic polymers present in the reactor tank R1 being controlled to less than 10 wt. %, and the resulting styrenic polymer solution being devolatilized and dried:

Process for producing styrene resin reduced in content of low-molecular ingredient

A thermoplastic acrylic composition comprising an acrylic particulate composite (B), which could be prepared by a sequential multi-stage polymerization method, and a thermoplastic acrylic resin (A); said composition having a characteristic morphology which is revealed under the observation of a transmission type electron microscope on a sliced specimen stained with a 1% ruthenic acid solution. Said composition shows well-balanced properties and has excellent impact resistance, lowered temperature dependency of haze, good transparency and good weatherability.

Growing community of inventors

Yokohama, Japan

Hironori Suezawa