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Thermoplastic resin composition having improved moldability comprising homogeneous blends of the resin with diamides
| Details |
Inventors: Abe, Katsuhiro; Kobayashi, Yoshinobu; Baba, Mitsushige;
Assignee: Mitsubishi Petrochemical Co., Ltd. (Tokyo, JP)
Primary Examiner: Lilling; Herbert J.
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
A composition comprising an amorphous resin (excluding polyphenylene ether) and a specific diamide compound of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are defined in the specification. The moldability of the amorphous resin is improved without reducing its heat resistance. |
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DETAILED DESCRIPTION OF THE INVENTION Various amorphous thermoplastic resins can be used in the present invention.
In the present invention, the "amorphous thermoplastic resins" denote those amorphous thermoplastic polymers which have a crystallinity, determined by X-ray diffraction under normal use conditions, of 20% or less.
Examples of the amorphous thermoplastic resins which can be preferably used in the present invention include polystyrene, high impact polystyrene, styrene copolymers (such as ABS resin), polyvinyl chloride, polymethacrylic acid esters, polyacrylic acid derivatives, polycarbonates, polynorbornene resins, polyarylates, polysulfones and polyether sulfones, and modification products of these thermoplastic resins, such as styrene-grafted polycarbonate.
The present invention can also use blends (polymer alloys) of these thermoplastic resins with each other, for example, an alloy of polycarbonate and polystyrene, an alloy of ABS resin and a vinyl chloride polymer, and an alloy of polycarbonate and a vinyl chloride polymer.
The preferred amorphous thermoplastic resins used in the present invention have a glass transition point of at least 100.
degree.
C.
, especially at least 120.
degree.
C.
Homo- or copolymers of styrene, .
alpha.
-methylstyrene or halogenated styrene, or copolymers of these styrene monomers and vinyl monomers copolymerizable therewith may be used as the polystyrene-type resins.
Modified polystyrene resins obtained by grafting these styrene monomers onto polymers such as polybutadiene can also be used.
Preferred polycarbonate resins are resins represented by the formula ##STR3## wherein R.
sup.
11 and R.
sup.
12 each represents hydrogen or an alkyl group having 1 to 8 carbon atoms, R.
sup.
13 and R.
sup.
14 each represents hydrogen, halogen or an alkyl group having 1 to 6 carbon atoms, and n is at least 20, preferably at least 50.
Preferred polynorbornene resins are resins represented by the formula ##STR4## wherein R.
sup.
15 and R.
sup.
16 each represents hydrogen or a hydrocarbon residue having 1 to 20 carbon atoms, and X
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