Claims
- 1. A hydrogenated block copolymer comprising:two polymer blocks A mainly comprising vinylaromatic hydrocarbon compound monomer units; and one hydrogenated polymer block B mainly comprising butadiene monomer units, in which at least 90% of olefinically unsaturated double bonds contained in a polymer block mainly comprising butadiene monomer units before hydrogenation have been hydrogenated, wherein a bonding vinylaromatic hydrocarbon compound content in the hydrogenated block copolymer is higher than 13 wt % but lower than 25 wt %, a 1,2-bond content in the unhydrogenated polymer block mainly comprising butadiene monomer units is higher than 40 mol% but lower than 60 mol%, and the copolymer has a quantity of heat of crystal fusion (ΔH) smaller than 0.05 J/g, an order-disorder transition temperature of 200° C. or higher, and a melt flow rate (MFR) value, as determined in accordance with JIS K7210 under the conditions of a temperature of 230° C. and a load of 2.16 kg, of from not smaller than 0.1 g/10 min to smaller than 30 g/10 min.
- 2. A polypropylene resin composition comprising:(1) from 99 to 60 parts by weight of a polypropylene resin; and (2) from 1 to 40 parts by weight of the hydrogenated block copolymer according to claim 1.
- 3. The polypropylene resin composition of claim 2, which further comprises (3) from 1 to 40 parts by weight of an ethylene-α-olefin copolymer rubber.
- 4. The polypropylene resin composition of claim 3, which further comprises (4) from 1 to 30 parts by weight of an inorganic filler.
- 5. The hydrogenated block copolymer of claim 1, which has a melt flow rate (MFR) value, as determined in accordance with JIS K7210 under the conditions of a temperature of 230° C. and a load of 2.16 kg, of from not smaller than 0.1 g/10 min to smaller than 15 g/10 min.
- 6. The hydrogenated block copolymer of claim 1, wherein the unhydrogenated polymer block mainly comprising butadiene monomer units is produced through polymerization in a reactor which, during the polymerization, has a peak internal temperature of 85° C. or lower and a temperature difference (ΔT) of 15° C. or smaller.
- 7. The polypropylene resin composition of claim 2, wherein the polypropylene resin comprises a propylene block copolymer having a melt flow rate (MFR) value, as determined in accordance with JIS K7210 under the conditions of a temperature of 230° C. and a load of 2.16 kg, of 50 g/10 min or higher.
- 8. The polypropylene resin composition of claim 3, wherein the ethylene-α-olefin copolymer rubber is an ethylene-octene copolymer.
- 9. The polypropylene resin composition of claim 3, wherein the ethylene-α-olefin copolymer rubber is an ethylene-octene copolymer which has an octene of 15 wt % or higher.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-157190 |
Jun 1998 |
JP |
|
Parent Case Info
This application is the national phase under 35 U.S.C. § 371 of PCT International Application No. PCT/JP99/02948 which has an International filing date of Jun. 2, 1999, which designated the United States of America.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP99/02948 |
|
WO |
00 |
4/5/2000 |
4/5/2000 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO99/64489 |
12/16/1999 |
WO |
A |
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Entry |
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