Mitsubishi Chemical Corporation

Mitsubishi Engineering-plastics Corporation

Tomonari Yokoyama

Masanori Yamamoto

Kenji Tsuruhara

Tatsuya Hitomi

Ryuuji Uchimura

Kazuyuki Takahashi

Ryouhei Nishihara

Michio Nakata

Tetsurou Nobuyasu

Yoshitaka Shiraishi

Masahide Shidou

Kiyotaka Hirano

To provide a polycarbonate resin composition excellent in surface hardness and impact strength. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the requirements:

Polycarbonate resin composition, method for producing same and molded article of this resin composition

To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements:

To provide a polycarbonate resin laminate having the surface hardness remarkably improved and being excellent in color and impact resistance. A polycarbonate resin laminate which comprises at least a surface layer (A) and a resin layer (B) and is characterized by satisfying the following conditions: (i) the surface layer (A) is a layer made of a polycarbonate resin composition which comprises at least a polycarbonate resin (a) having at least structural units represented by the following formula (1) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), (ii) the mass ratio of the polycarbonate resin (a) to the polycarbonate resin (b) in the surface layer (A) is within a range of from 45:55 to 99:1, and (iii) the pencil hardness of the polycarbonate resin laminate as specified by ISO 15184 and measured from the surface layer (A) side is at least H: 

Polycarbonate resin laminate

To provide a polycarbonate resin composition having improved flame retardancy and moldability. A polycarbonate resin having a ratio of the melt viscosity &#x3b7;measured at 300&#xb0; C. at a shear rate of 10 secto the melt viscosity &#x3b7;measured at 300&#xb0; C. at a shear rate of 1000 sec(&#x3b7;/&#x3b7;) of at least 3 and at most 8, a branch parameter G=[&#x3b7;]/[&#x3b7;]lin of at least 0.80 and at most 0.94, and a pencil hardness of at least HB.

Polycarbonate resin, composition of said resin, and molded article of said resin

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Hiratsuka, Japan

Tomonari Yokoyama