Pressure sensitive adhesive composition and protective film employing the same
US12338374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2019 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Jun 1, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2477/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pressure sensitive adhesive composition and a protective film employing the same are provided. The pressure sensitive adhesive composition includes 30-45 parts by weight of a tackifier and 55-70 parts by weight of a polymer. The polymer includes at least one block copolymer. The block copolymer includes a vinyl aromatic block polymerized by a vinyl aromatic monomer and a conjugated diene block polymerized by a conjugated diene monomer. The block copolymer meets one of the following conditions: (1) the content of the vinyl aromatic monomer is from 15 wt % to 25 wt % and the content of the vinyl group of the conjugated diene block is less than or equal to 45 wt % or, (2) the content of the vinyl aromatic monomer is from 10 wt % to 15 wt % and the content of the vinyl group of the conjugated diene block is less than or equal to 45 wt %, or greater than or equal to 60 wt %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.