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US 12,441,877 B2Granted
Thermoplastic resin composition
AssigneeLG Chem, Ltd.
InventorsTae Hee Kim, Ki Soo Lee, Eun Ji Shin, Seok Pil Sa, Seul Ki Im, Hyun Mo Lee, Ji Hyun Park, Yun Kon Kim, Seung Jung Yu
Life of this patent
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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 both ends of a polypropylene and polyolefin chain, and the thermoplastic resin composition according to the present invention exhibits high fluidity properties as well as soft feel and high restoring force.
Claims20
A thermoplastic resin composition comprising:
- (1) polypropylene;
- and
- (2) a polyolefin-polystyrene-based multi-block copolymer satisfying the following conditions (a) and (b) in the temperature range of −80 to 40° C. in a graph showing an amount of change in loss tangent (tan δ) (y axis) according to temperature (x-axis) obtained by dynamic mechanical analysis (DMA):
- (a) the height of a tan δ peak is 0.45 to 0.60;
- and
- (b) the half-width of a tan δ peak is 22.5 to 30.0° C.
3 more elements
Dependencies are inferred from the claim text.