Koza Novel Materials Korea Co., Ltd.

Lg Chem, Ltd

Ho Kyung Song

Sle Lee

Jun Man Choi

Jae Sung Hong

Jang Soon Kim

Woo Yeon Kim

Kwang Su Seo

Dong Hoon Lim

Ju Yong Seo

Hu Young Yoon

An adhesive composition and an adhesive film including a cured product thereof is provided.

Adhesive composition and adhesive film including cured product thereof

Provided is a multilayer adhesive tape having excellent step coverage and reworkability. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which the intermediate adhesive layer includes an intermediate adhesive polymer including: a polymerization unit of an alkyl group-containing (meth)acrylate monomer; a polymerization unit of a carboxyl group-containing monomer; and a polymerization unit of an acrylamide-based monomer.

Multilayer adhesive tape

A multilayer adhesive tape is provided, including: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer sequentially. At least one of the first outer adhesive layer and the second outer adhesive layer includes a cured product of an outer adhesive composition including a high molecular weight prepolymer having a weight average molecular weight of 100,000 g/mol or more and 1,500,000 g/mol or less and a low molecular weight prepolymer having a weight average molecular weight of 1,000 g/mol or more and 80,000 g/mol or less.

A multilayer adhesive film is provided including: a first outer adhesive layer; a second outer adhesive layer; and an intermediate adhesive layer disposed between the first outer adhesive layer and the second outer adhesive layer. The multilayer adhesive film has both high step absorbency and excellent reworkability.

Multilayer adhesive film

A multilayer adhesive tape exhibiting high step coverage and having both high reworkability and excellent punchability is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which a glass transition temperature of the intermediate adhesive layer is &#x2212;40&#xb0; C. or more and 0&#xb0; C. or less, a glass transition temperature of each of the first outer adhesive layer and the second outer adhesive layer is &#x2212;60&#xb0; C. or more and &#x2212;20&#xb0; C. or less, and a difference in glass transition temperature between each of the first outer adhesive layer and the second outer adhesive layer and the intermediate adhesive layer is 5&#xb0; C. or more and 25&#xb0; C. or less.

Growing community of inventors

Daejeon, South Korea

Ho Kyung Song