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US 4,792,585 AGranted
Thermoplastic resin composition
AssigneeJapan Synthetic Rubber Co., Ltd.
InventorsKazuhiko Yamamoto, Kenji Nobuhara, Hodaka Mizuno, Atsuko Yanagawa
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AssigneeJapan Synthetic Rubber Co., Ltd.
InventorsKazuhiko Yamamoto, Kenji Nobuhara, Hodaka Mizuno, Atsuko Yanagawa
Estimating the term…
A thermoplastic resin composition consisting essentially of: (A) 20 to 80% by weight of a polycarbonate having a viscosity-average molecular weight of 14,000 to 27,000, (B) 10 to 70% by weight of a maleimide resin obtained by polymerizing 95 to 35 parts by weight of a monomer mixture consisting of 10 to 70% by weight of a maleimide compound, 25 to 80% by weight of an aromatic alkenyl compound, 5 to 40% by weight of an alkenyl cyanide compound and optionally 50% by weight or less of a monomer copolymerizable therewith, in the presence of 5 to 65 parts by weight of at least one rubber-like polymer selected from the group consisting of an ethylene-propylene-nonconjugated diene rubber, an ethylene-propylene rubber and an acrylic rubber, and (C) 5 to 70% by weight of a styrene resin obtained by polymerizing 95 to 20 parts by weight of a monomer mixture consisting of 5 to 40% by weight of an alkenyl cyanide compound, 10 to 95% by weight of an aromatic alkenyl compound and optionally 0 to 70% by weight of at least one other alkenyl monomer copolymerizable with said compounds, in the presence of 5 to 80 parts by weight of a rubbery polymer. Said resin composition is excellent in balance of properties in respect of heat resistance, moldability, impact resistance and chemical resistance and is suitable for use in automobile parts, electric appliances, household articles, industrial articles, etc.
A thermoplastic resin composition consisting essentially of:
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds ;…:…
Compositions of polycarbonates
Compositions of macromolecular compounds
Term ended 1 Dec 2007 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
Drawings are temporarily unavailable. Open the PDF at USPTO
This invention relates to a thermoplastic resin composition excellent in heat resistance, moldability and impact resistance and particularly in chemical resistance. More particularly, this invention relates to a thermoplastic resin composition consisting essentially of a polycarbonate, a maleimide resin and a styrene resin.
With the recent diversification of their application fields, resin moldings tend to be more complicated and large-sized. In order to respond thereto, the need for highly functional resins has increased. As such highly functional resins, engineering plastics such as polycarbonates and the like have heretofore been used.
It is widely known that polycarbonates have excellent impact resistance and heat resistance. However, they have a high melt viscosity and hence are inferior in moldability.
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:
FIG. 1 is an apparatus which tests the oil resistance of the present thermoplastic resin composition; and
FIG. 2 shows the places at which the dimensions are measured which are required to calculate critical strain as an indication of oil resistance.
According to this invention, there is provided a thermoplastic resin composition consisting essentially of:
(A) 20 to 80% by weight of a polycarbonate having a viscosity-average molecular weight of 14,000 to 27,000,
(B) 10 to 70% by weight of a maleimide resin obtained by polymerizing 95 to 35 parts by weight of a monomer mixture consisting of 10 to 70% by weight of a maleimide compound, 25 to 80% by weight of an aromatic alkenyl compound, 5 to 40% by weight of an alkenyl cyanide compound and optionally 50% by weight or less of a monomer copolymerizable therewith, in the presence of 5 to 65 parts by weight of at least one rubber-like polymer selected from the group consisting of an ethylene-propylene-nonconjugated diene rubber, an ethylene-propylene rubber and an acrylic rubber, and