公开(公告)号：US20210139749A1

公开(公告)日：2021-05-13

申请号：US17091855

申请日：2020-11-06

Applicant: TSRC Corporation

Inventor： Hsi-Hsin Shih ,  Wen-Pin Tsai ,  Feng-Yu Yang ,  Tai-Yi Shiu ,  Ching Ting

IPC: C09J7/38 ,  C09J109/06 ,  C09J7/24

Abstract: The present invention provides a polymer composition for pressure sensitive adhesives or films thereof. The polymer composition comprises 20-40 parts by weight of a tackifier; and 60-80 parts by weight of a polymer, wherein the polymer and the tackifier are 100 parts by weight. The polymer comprises at least a first vinyl aromatic based copolymer formed by polymerization of vinyl aromatic monomer and conjugated diene monomer, wherein a vinyl aromatic monomer content of the first vinyl aromatic based copolymer is 16 wt %˜28 wt %, a vinyl structure content of a conjugated diene monomer content in the first vinyl aromatic based copolymer is 32 wt %˜50 wt %; and a melt flow index (MFI) of the first vinyl aromatic based copolymer is 20 g/10 min˜60 g/10 min (230° C., 2.16 kg). The present invention also provides the pressure sensitive adhesives or films made from the polymer composition.