Thermoplastic resin composition
AssigneeLG Chem, Ltd.
InventorsHyun Mo Lee, Seul Ki Im, Ji Hyun Park, Yun Kon Kim, Seung Jung Yu, Seok Pil Sa, Ki Soo Lee, Eun Ji Shin
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Abstract
The present invention relates to a thermoplastic resin composition including a polyolefin-polystyrene-based multiblock copolymer having a structure in which a polystyrene chain is attached to both ends of a polypropylene and polyolefin chain, and the thermoplastic resin composition according to the present invention has excellent elongation and tensile strength as well as high fluidity properties, and thus, may exhibit excellent molding processability.
Claims17
A thermoplastic resin composition comprising:
- (1) polypropylene;
- and
- (2) a polyolefin-polystyrene-based multi-block copolymer satisfying the following conditions (a) and (b):
- (a) Complex viscosity (η*) at a temperature of 160° C. and a frequency (ω) of 0.5 rad/s:
- 40,000 to 350,000 Pa·s
- (b) Complex viscosity at a temperature of 160° C. and a frequency of 125 rad/s:
- 900 to 3,500 Pa·s.
A method for preparing a polyolefin-polystyrene-based multi-block copolymer, the method comprising:
- (S1) forming a polyolefin block by polymerizing an olefin-based monomer using an organozinc compound as a chain transfer agent in the presence of a catalyst composition including a transition metal compound represented by Formula 1 below:
- in Formula 1 above,
- R1 to R11 are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an arylalkoxy group having 7 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, an alkylsilyl group having 1 to 20 carbon atoms, or an arylalkyl group having 7 to 20 carbon atoms,
- two or more of R1 to R11 adjacent to each other are optionally connected to each other to form an aliphatic ring having 3 to 20 carbon atoms or an aromatic ring having 6 to 20 carbon atoms, and
- X1 and X2 are each independently hydrogen, halogen, a hydroxyl group, an amino group, a thio group, a silyl group, a cyano group, a nitro group, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms, a heteroaryl group having 5 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, an alkylamino group having 1 to 20 carbon atoms, an arylamino group having 6 to 20 carbon atoms, an alkylthio group having 1 to 20 carbon atoms, an arylthio group having 6 to 20 carbon atoms, an alkylsilyl group having 1 to 20 carbon atoms, or an arylsilyl group having 6 to 20 carbon atoms, and
- (S2) forming a polystyrene block by anionic polymerization of the polyolefin block and a styrene-based monomer in the presence of an alkyl lithium compound including silicon atom and a triamine compound.
Dependencies are inferred from the claim text.