Claims
- 1. An electroconductive resin composition consisting essentially of
- (A) a high impact polystyrene resin, or a mixture of a polystyrene resin and a high impact polystyrene resin,
- (B) carbon black,
- (C) an olefin resin, and
- (D) at least one block copolymer prepared from styrene and a conjugated diene,
- said electroconductive resin composition containing from 5 to 50 parts by weight of (B) the carbon black per 100 parts by weight of (A),
- and from 1 to 30 parts by weight of (C) the olefin resin and from 0.2 to 10 parts by weight, of (D) the block copolymer prepared from styrene and a conjugated diene, per 100 parts by weight of the total amounts of (A) and (B) the carbon black,
- and said electroconductive resin composition having a surface resistivity of from 10.sup.2 to 10.sup.10 .OMEGA. and a melt flow index of at least 0.1 g/10 min at 200.degree. C. under a load of 5 kg.
- 2. An electroconductive resin composition, consisting essentially of
- (A) a high impact polystyrene resin, or a mixture of a polystyrene resin and a high impact polystyrene resin,
- (B) carbon black,
- (C) an olefin resin, and
- (E) a resin obtained by hydrogenation of a block copolymer prepared from styrene and a conjugated diene and/or a resin obtained by graft polymerization of styrene to a polyolefin,
- said electroconductive resin composition containing from 5 to 50 parts by weight of (B) the carbon black per 100 parts by weight of (A),
- and from 1 to 30 parts by weight of (C) the olefin resin and from 1 to 30 parts by weight, of (E) the resin obtained by hydrogenation of a block copolymerization prepared from styrene and a conjugated diene and/or the resin obtained by graft polymerization of styrene to a polyolefin, per 100 parts by weight of the total amount of (A) and (B) the carbon black,
- and said electroconductive resin composition having a surface resistivity of from 10.sup.2 to 10.sup.10 .OMEGA. and a melt flow index of at least 0.1 g/10 min at 200.degree. C. under a load of 5 kg.
- 3. The electroconductive resin composition according to claim 1, wherein (C) the olefin resin is a polyethylene resin.
- 4. The electroconductive resin composition according to claim 2, wherein (C) the olefin resin is a polyethylene resin.
- 5. An electroconductive resin composition consisting essentially of
- (A) a polystyrene resin, a high impact polystyrene resin, or a mixture thereof,
- (B) carbon black,
- (C) an olefin resin, and
- (D) at least two block copolymers prepared from styrene and a conjugated diene, wherein at least one of them is (D1) a star block copolymer having a styrene content of from 50 to 90 wt %, and at least one of other block copolymers is (D2) a star of linear block copolymer having a styrene content of from 10 to 50 wt %,
- said electroconductive resin composition containing from 5 to 50 parts by weight of (B) the carbon black per 100 parts by weight of (A),
- and from 1 to 30 parts by weight of (C) the olefin resin and from 0.2 to 10 parts by weight, of (D) the block copolymers prepared from styrene and a conjugated diene, per 100 parts by weight of the total amounts of (A) and (B) the carbon black,
- and said electroconductive resin composition having a surface resistivity of from 10.sup.2 to 10.sup.10 .OMEGA. and a melt flow index of at least 0.1 g/10 min at 200.degree. C. under a load of 5 kg.
- 6. An electroconductive resin sheet made of the resin composition as defined in claim 1.
- 7. An electroconductive resin sheet made of the resin composition as defined in claim 2.
- 8. An injection molded product made of the resin composition as defined in claim 1.
- 9. An injection molded product made of the resin composition as defined in claim 2.
- 10. An electroconductive container obtained by thermoforming the electroconductive resin sheet as defined in claim 1.
- 11. An electroconductive container obtained by thermoforming the electroconductive resin sheet as defined in claim 2.
Priority Claims (3)
Number |
Date |
Country |
Kind |
7-10685 |
Jan 1995 |
JPX |
|
7-10686 |
Jan 1995 |
JPX |
|
7-87000 |
Apr 1995 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 08/834,297 filed on Apr. 15, 1997, now U.S. Pat. No. 5,707,699 which is a continuation of Ser. No. 08/578,480 filed Dec. 26, 1995, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
5395890 |
Nakano et al. |
Mar 1995 |
|
5484838 |
Helms et al. |
Jan 1996 |
|
5688317 |
Mackay et al. |
Nov 1997 |
|
5705555 |
Guilfoy et al. |
Jan 1998 |
|
Continuations (2)
|
Number |
Date |
Country |
Parent |
834297 |
Apr 1997 |
|
Parent |
578480 |
Dec 1995 |
|