Hot-melt adhesive composition and manufacturing method therefor
AssigneeLG Chem, Ltd.
InventorsSe Kyung Lee, Tae Jung Kim, Hyun Woo Kim, Seong Du Lee
Life of this patent
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Abstract
A hot melt adhesive composition is provided that includes: a diblock copolymer including a styrene-based monomer-derived unit and a conjugated diene-based monomer-derived unit; a triblock copolymer which is a coupled polymer of the diblock copolymer; and a crosslinked block copolymer including a crosslinking agent-derived crosslinked part crosslinked with two or more of the diblock copolymer and the triblock copolymer. The conjugated diene-based monomer-derived unit includes an isoprene-derived unit and an epoxidized isoprene rubber.
Claims13
A hot melt adhesive composition comprising:
- a diblock copolymer including a styrene-based monomer-derived unit and a conjugated diene-based monomer-derived unit;
- a triblock copolymer which is a coupled polymer of the diblock copolymer;
- and
- a crosslinked block copolymer including a crosslinking agent-derived crosslinked part crosslinked with two or more of the diblock copolymers and the triblock copolymers,
- wherein the crosslinking agent-derived crosslinked part is one or more selected from the group consisting of polyalkylene glycol and ethylene glycol, and
- wherein the conjugated diene-based monomer-derived unit includes an isoprene-derived unit and an epoxidized isoprene unit represented by the following chemical formula 1:
A method of preparing a hot melt adhesive composition, comprising:
- polymerizing a styrene-based monomer in the presence of a hydrocarbon solvent and a polymerization initiator to prepare a styrene-based monomer block;
- polymerizing the styrene-based monomer block and isoprene to prepare a diblock copolymer including a styrene-based monomer-derived unit and an isoprene-derived unit;
- coupling two or more of the diblock copolymers and a coupling agent to prepare a triblock copolymer, thereby preparing a block copolymer composition including the triblock copolymer and the diblock copolymer;
- reacting a part of the isoprene-derived unit included in the diblock copolymer and the triblock copolymer and a mixture of hydrogen peroxide and a carboxylic acid to substitute a part of the isoprene-derived unit with an epoxidized isoprene unit;
- and
- crosslinking two or more of the triblock copolymers and the diblock copolymers including the epoxidized isoprene unit with a crosslinking agent to prepare a crosslinked block copolymer,
- wherein the crosslinking agent is one or more selected from the group consisting of polyalkylene glycol and ethylene glycol.
Dependencies are inferred from the claim text.