Graft copolymer, process for production thereof and resin composition ...

United States Patent [19]

Machida et al.

[ii]

[45]

US005362814A

Patent Number:
Date of Patent:

5,362,814 Nov. 8, 1994

[54] GRAFT COPOLYMER, PROCESS FOR PRODUCTION THEREOF AND RESIN COMPOSITION CONTAINING SAME

[75] Inventors: Shuji Machida; Noriyuki Tani, both of Sodegaura, Japan

[73] Assignee: Idemitsu Kosan Co., Ltd., Tokyo, Japan

[21] Appl. No.: 25,781

[22] Filed: Mar. 3,1993

[30] Foreign Application Priority Data

Mar. 3, 1992 [JP] Japan 4-045626

May 20, 1992 [JP] Japan 4-151247

[51] Int. C1.5 C08F 255/02; C08F 279/02;

C08F 259/02; C08F 259/08; C08F 4/76; C08F

4/642

[52] U.S. CI 525/324; 525/247;

525/268; 525/249; 525/276; 525/289; 525/292;

525/297; 525/316; 525/319; 524/504 [58] Field of Search 525/247, 324, 249, 276,

525/289, 292, 297, 313, 319, 268, 316; 524/504

[56] References Cited

U.S. PATENT DOCUMENTS

4,680,353 7/1987 Ishihara et al 526/138

4,853,436 8/1989 Ohata et al 525/315

5,023,304 6/1991 Takeuchi et al 526/160

5,166,238 11/1992 Nakanoetal 526/347.2

5,247,020 9/1993 Nakano et al 525/285

5,250,629 10/1993 Tanietal 125/268

FOREIGN PATENT DOCUMENTS

0315431 5/1989 European Pat. Off. .

0333878 9/1989 European Pat. Off. .

0389981 10/1990 European Pat. Off. .

0421659 4/1991 European Pat. Off. .

0440014 8/1991 European Pat. Off. .

Primary Examiner—Vasu S. Jagannathan

Attorney, Agent, or Firm—Obion, Spivak, McClelland,

Maier & Neustadt

[57] ABSTRACT

There are disclosed a graft copolymer formed by grafting a styrenic monomer onto a high polymer having double bonds in the side chain to constitute highly syndiotactic polystyrenic chain as the graft component, the graft copolymer having a content of graft component of 0.005 to 99% by weight and a reduced viscosity of 0.01 to 30 dl/g as measured at a concentration of 0.05 g/dl in 1,2,4-trichlorobenzene at 135° C. or a melt index of 0.001 to 500 g/10 minutes as measured at 300" C. under a load of 2.16 kg; a process for efficiently producing the above graft copolymer using a catalyst comprising specific components; and a resin composition comprising the above graft copolymer, a highly syndiotactic styrenic polymer or other thermoplastic resin and, when necessary, an inorganic or organic filler. The above graft copolymer and resin composition are excellent in resistance to heat and chemicals, electrical properties, moldability, compatibility, impact resistance, etc.

17 Claims, 3 Drawing Sheets