Samsung patents adhesive film that stays flexible in heat and cold
This patent describes a specific type of glue film designed to keep its flexibility across a wide temperature range, from -20°C to 80°C. The material is made from a mixture of chemical building blocks that create a polymer with a very low freezing point, ensuring it does not become brittle or stiff when heated or cooled.
In the filing’s own words
An adhesive film has an average slope of about −9.9 to about 0, as measured over a temperature range of about −20° C. to about 80° C. in a graph depicting a temperature-dependent storage modulus distribution of the adhesive film where the x-axis represents temperature (° C.) and the y-axis represents storage modulus (kPa). The adhesive film also has a storage modulus at about 80° C. of about 10 kPa to about 1,000 kPa.
What exactly they claim (claim 1)
1. An adhesive film having an average slope of −5.0 to 0, as measured over a temperature range of −20° C. to 80° C. in a graph of storage modulus versus temperature in which the x-axis represents temperature (° C.) and the y-axis represents the storage modulus (kPa), the adhesive film having a storage modulus at 25° C. of 10 kPa to 500 kPa, and the adhesive film having a storage modulus at 80° C. of 10 kPa to 1,000 kPa, wherein the adhesive film is formed from an adhesive composition comprising a monomer mixture configured to form a (meth)acrylic copolymer having a glass transition temperature of about −150° C. to about −13° C., at least one of an initiator or a crosslinking agent, and optionally organic particles, the monomer mixture consists of a hydroxyl group-containing (meth)acrylate monomer and a comonomer, a homopolymer of the comonomer has a glass transition temperature of about −150° C. to about 0° C., and optionally a carboxyl group-containing monomer, and wherein the comonomer is selected from the group consisting of linear or branched alkyl (meth)acrylate monomers, ethylene oxide-containing monomers, propylene oxide-containing monomers, amine group-containing monomers, alkoxy group-containing monomers, phosphoric acid group-containing monomers, sulfonic acid group-containing monomers, phenyl group-containing monomers, silane group-containing monomers, and combinations thereof.
Facts
- Company
- Samsung (SAMSUNG ELECTRONICS CO., LTD.)
- Official title
- Adhesive composition, adhesive film prepared from the same and display member including the same
- Patent number
- US12747374B2
- Application number
- 17682818
- Filed
- Feb 28, 2022
- Granted
- Sep 29, 2026
- Inventors
- 12
- Claims
- 26
Classified under
C09J 7/10 Chemistry & metalsC08L 53/02 Chemistry & metalsC09J 7/00 Chemistry & metalsC09J 7/22 Chemistry & metalsC09J 7/38 Chemistry & metalsC09J 133/066 Chemistry & metalsMore from Samsung in Materials & manufacturing
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.