Reinforced thermoplastic resin composition and molded article

• US 8,536,248 B2
• Filed: 09/24/2010
• Issued: 09/17/2013
• Est. Priority Date: 09/24/2009
• Status: Active Grant

• Current Assignee: Techno-Umg Co., Ltd. (JSR Corporation)
• Original Assignee: UMG ABS Ltd.
• Inventors: Nakamoto, Masahito, Tezuka, Koichi
• Primary Examiner(s): SZEKELY, PETER A
• Application Number:
  US13/497,758
• Publication Number:
  US 20120178860A1
• Time in Patent Office: 1,089 Days
• Field of Search: 523/205, 523/206, 523/209, 523215-217, 524/127
• US Class Current: 523/215
• CPC Class Codes: C08K 5/521 Esters of phosphoric acids, e.g. of H3PO4
• CPC Class Codes: C08K 9/04 Ingredients treated with organic substances treated with macromolecular compounds C08K9/08
• CPC Class Codes: C08K 9/08 Ingredients agglomerated by treatment with a binding agent
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 51/04 grafted on to rubbers
• CPC Class Codes: C08L 55/02 ABS [Acrylonitrile-Butadiene-Styrene] polymers
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates

Abstract

The reinforced thermoplastic resin composition of the present invention includes: 50 to 90% by weight of a polycarbonate resin (A); 10 to 50% by weight of a graft copolymer mixture (B) (provided that a total amount of the component (A) and the component (B) accounts for 100% by weight) which is obtained by graft-polymerizing an aromatic alkenyl compound monomer unit (a) and a vinyl cyanide compound monomer unit (b) onto a rubber polymer (B1); and 6 to 22 parts by weight of an inorganic filler (D) which has been surface-treated with a water-soluble polyamide, relative to the total of 100 parts by weight of the polycarbonate resin (A) and the graft copolymer mixture (B). There is provided a reinforced thermoplastic resin composition exhibiting excellent moldability, generates a minimal amount of gas during molding, and also being capable of improving the rigidity of the resulting molded article and the impact resistance when dropping the product.

Claims

1. A reinforced thermoplastic resin composition comprising:

50 to 90% by weight of a polycarbonate resin (A);

10 to 50% by weight of a graft copolymer mixture (B) (provided that a total amount of the component (A) and the component (B) accounts for 100% by weight); and

6 to 22 parts by weight of an inorganic filler (D) which has been surface-treated with a water-soluble polyamide, relative to the total of 100 parts by weight of the polycarbonate resin (A) and the graft copolymer mixture (B),

wherein said graft copolymer mixture (B) contains a graft copolymer (B′

) in which a graft polymer (B2) having an aromatic alkenyl compound monomer unit (a) and a vinyl cyanide compound monomer unit (b) is graft-polymerized onto a rubber polymer (B1); and

a polymer (B″

) having the aromatic alkenyl compound monomer unit (a) and the vinyl cyanide compound monomer unit (b).

2. The reinforced thermoplastic resin composition according to claim 1 further comprising a phosphoric acid ester-based flame retardant (E).

3. The reinforced thermoplastic resin composition according to claim 2,

wherein said phosphoric acid ester-based flame retardant (E) has a weight average molecular weight of at least 326 and not more than 800.

4. The reinforced thermoplastic resin composition according to any one of claims 1 to 3,

wherein said inorganic filler (D) which has been surface-treated with a water-soluble polyamide is a carbon fiber which has been surface-treated with a water-soluble polyamide.

5. A molded article which is formed through molding and processing of the reinforced thermoplastic resin composition according to claim 1.