Thermoplastic resin composition

• US 5,412,024 A
• Filed: 04/09/1992
• Issued: 05/02/1995
• Est. Priority Date: 04/09/1991
• Status: Expired due to Fees

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Machida, Shuji, Okada, Akihiko
• Primary Examiner(s): Michl, Paul R.
• Assistant Examiner(s): Guarriello, John J.
• Application Number:
  US07/865,457
• Time in Patent Office: 1,118 Days
• Field of Search: 524/577, 524/578, 524/494, 524/496, 525/333.3
• US Class Current: 524/577
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08L 25/06 Polystyrene
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• 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 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence

Abstract

There is disclosed a thermoplastic resin composition which comprises a terminal-modified styrenic polymer having syndiotactic configuration the terminal of which is bonded to a compound having a polar group or a composition of the above terminal-modified styrenic polymer and a terminal-unmodified styrenic polymer having syndiotactic configuration, and an inorganic filler. The composition of the present invention is excellent in resistances to water, impact and heat as well as in mechanical properties and adhesivity with inorganic fillers without impairing the crystallization of the styrenic polymer having syndiotactic configuration.

Claims

1. A thermoplastic resin composition which comprises 100 parts by weight of (A) a terminally-modified styrenic polymer having syndiotactic configuration, and having bonded as terminal modification solely to the terminal ends of the styrenic polymer having syndiotactic configuration a compound having both a polar group and a carbon-carbon double bond or a carbon-carbon triple bond and 1 to 350 parts by weight of (B) an inorganic filler.

2. The composition according to claim 1, wherein said thermoplastic resin composition further comprises a styrenic polymer having syndiotactic configuration.

3. The composition according to claim 1, wherein said component (B) is contained in an amount of 5 to 200 parts by weight.

4. The composition according to claim 1, wherein said compound is at least one compound selected from the group consisting of unsaturated carboxylic acid, unsaturated carboxylic acid anhydride, unsaturated epoxy compound, unsaturated alcohol, unsaturated amine and unsaturated isocyanic acid ester.

5. The composition according to claim 4, wherein said compound is glycidyl methacrylate.

6. The composition according to claim 4, wherein said compound is maleic anhydride.

7. The composition according to claim 1 further comprising a thermoplastic resin other than said component (A).

8. The composition according to claim 1, further comprising a rubbery elastomer.

9. The composition according to claim 1, wherein said component (B) is glass fiber or carbon fiber.

10. The composition according to claim 9, wherein said component (B) is glass fiber the surface of which is treated with a surface treatment agent.

11. The composition according to claim 10, wherein said surface treatment agent is selected from silane-based coupling agent and titanium-based coupling agent.

12. The composition according to claim 11, wherein said silane-based coupling agent is aminosilane.

13. The composition according to claim 1, further comprising an organic filler in addition to said component (B).

14. The thermoplastic resin of claim 1 wherein the compound is bonded to the styrenic polymer having syndiotactic configuration by addition of the compound to the styrenic polymer having syndiotactic configuration in the presence of the catalyst employed for polymerizing the styrenic-monomer required to prepare the styrenic polymer.

15. The thermoplastic resin of claim 14 wherein the styrenic polymer having syndiotactic configuration to which the compound is bonded is polystyrene having syndiotactic configuration.

16. A composition according to claim 8 further comprising a styrenic polymer having syndiotactic configuration.