Back to results
US 12,753,300 B2Granted
Thermoplastic resin composition
AssigneeLG Chem, Ltd.
InventorsJi Hyun Park, Seul Ki Im, Hyun Mo Lee, Yun Kon Kim, Seung Jung Yu, Seok Pil Sa, Ki Soo Lee, Eun Ji Shin
Life of this patent
Estimating the term…
Abstract
The present invention relates to a thermoplastic resin composition including a polyolefin-polystyrene-based multi-block copolymer having a structure in which a polystyrene chain is attached to polyolefin chains, and the thermoplastic resin composition according to the present invention has significantly improved low-temperature and room temperature impact strength properties as well as high fluidity properties, and thus, may exhibit excellent molding processability.
Claims15
A thermoplastic resin composition comprising:
- (1) polypropylene;
- and
- (2) a polyolefin-polystyrene-based multi-block copolymer satisfying the following conditions (a) to (c) measured from Gel Permeation Chromatography (GPC) and the following condition (d) in 13C NMR (500 MHz, tetrachloroethane-d2, standard material TMS) spectrum:
- (a) a weight average molecular weight is 50,000 to 300,000 g/mol,
- (b) a molecular weight distribution is 1.5 to 3.0,
- (c) for gel permeation chromatography measurement results, a Gaussian function modeled from a graph having log Mw as an x-axis and dw/d log Mw as a y-axis is represented by Equation 1 below, wherein in Equation 1 below, each constant value satisfies −0.05<A<0.06, 4.6<B<5.5, 0.9<C<1.1, and 0.5<D<0.9, and
- (d) a polyolefin block included in the polyolefin-polystyrene-based multi-block copolymer includes one or more branching points, wherein a carbon atom of the branching points exhibits a peak of 36 to 40 ppm, and a terminal carbon atom of a branched chain branched from the branching point exhibits a peak of 13 to 15 ppm,
- dw
- d
-
- log
-
- Mw
- =
- A
- +
- C
-
- exp
- (
- -
- 4
-
- ln
-
- (
- 2
- )
-
- (
- log
-
- Mw
- -
- B
- )
- 2
- D
- 2
- )
- D
-
- π
- 4
-
- ln
-
- (
- 2
- )
- [
- Equation
-
- 1
- ]
- wherein in Equation 1 above, Mw represents the weight average molecular weight of a polyolefin-polystyrene-based multi-block copolymer.
53 more elements
A method for preparing a polyolefin-polystyrene-based multi-block copolymer, 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, 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,
- in Formula 1,
- 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 which are 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,
- wherein the organozinc compound is a compound represented by Formula 4:
- in Formula 4,
- A is alkylene having 1 to 20 carbon atoms, arylene having 6 to 20 carbon atoms, or arylene having 6 to 20 carbon atoms substituted with halogen, alkyl having 1 to 12 carbon atoms, cycloalkyl having 3 to 12 carbon atoms, alkoxy having 1 to 8 carbon atoms, or aryl having 6 to 12 carbon atoms, and
- B is arylene having 6 to 12 carbon atoms substituted with alkenyl having 2 to 12 carbon atoms.
7 more elements
Dependencies are inferred from the claim text.