US 12,338,374 B2
Pressure sensitive adhesive composition and protective film employing the same
Wen-Pin Tsai, Kaohsiung (TW); Philip Chung-Ming Yang, Kaohsiung (TW); and Hsi-Hsin Shih, Kaohsiung (TW)
Assigned to TSRC CORPORATION, Kaohsiung (TW)
Filed by TSRC CORPORATION, Kaohsiung (TW)
Filed on Dec. 27, 2019, as Appl. No. 16/729,099.
Claims priority of provisional application 62/788,210, filed on Jan. 4, 2019.
Prior Publication US 2020/0216726 A1, Jul. 9, 2020
Int. Cl. C09J 153/02 (2006.01); C08K 5/00 (2006.01); C08K 5/01 (2006.01); C08L 53/02 (2006.01); C09J 7/24 (2018.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); C09J 11/08 (2006.01); C09J 109/06 (2006.01); C09J 125/10 (2006.01)
CPC C09J 153/02 (2013.01) [C08K 5/0016 (2013.01); C08K 5/01 (2013.01); C08L 53/02 (2013.01); C09J 7/241 (2018.01); C09J 7/25 (2018.01); C09J 7/255 (2018.01); C09J 7/387 (2018.01); C09J 11/08 (2013.01); C09J 109/06 (2013.01); C09J 125/10 (2013.01); C09J 153/025 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C09J 2301/408 (2020.08); C09J 2423/006 (2013.01); C09J 2423/04 (2013.01); C09J 2423/10 (2013.01); C09J 2425/00 (2013.01); C09J 2433/006 (2013.01); C09J 2467/006 (2013.01); C09J 2469/006 (2013.01); C09J 2475/006 (2013.01); C09J 2477/006 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pressure sensitive adhesive composition, comprising:
30-45 parts by weight of a tackifier; and
55-70 parts by weight of a polymer, wherein the polymer is a combination of a block copolymer meeting Condition (1) and a block copolymer meeting Condition (2),
wherein the total weight of the tackifier and the polymer is 100 parts by weight,
wherein the block copolymer meeting Condition (1) comprises a vinyl aromatic block polymerized by a vinyl aromatic monomer and a conjugated diene block polymerized by a conjugated diene monomer, and the content of the vinyl aromatic monomer is from 18.29 wt % to 25 wt %, based on the total weight of the block copolymer meeting Condition (1), and the content of the vinyl group of the conjugated diene block is less than or equal to 39.19 wt %, based on the weight of the conjugated diene block, and
the block copolymer meeting Condition (2) comprises the vinyl aromatic block polymerized by the vinyl aromatic monomer and the conjugated diene block polymerized by the conjugated diene monomer, and the content of the vinyl aromatic monomer is from 10 wt % to 15 wt %, based on the total weight of the block copolymer meeting Condition (2), and the content of the vinyl group of the conjugated diene block is less than or equal to 38 wt %, or greater than or equal to 72 wt %, based on the weight of the conjugated diene block.