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US 8,273,821 B2Granted
Adhesives composition comprising mixtures of multi-block copolymers
AssigneeKorea Kumho Petrochemical Co., Ltd.
InventorsJae Yun Kim, Ok Kil Mun, Eun Kyung Noh
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Abstract
The present invention relates to an adhesive composition comprising a mixture of multi-block copolymers, in particular, an adhesive composition comprising a block copolymer represented by Formula 1, a hydrocarbon adhesive resin and a plasticizer. The adhesive composition according to the present invention can be easily processed due to its low melting point and shows improved adhesive properties such as loop tack, 180° peel strength and holding power.
Claims9
An adhesive composition comprising:
- a block copolymer consisting of a triblock (A-B-A′) and a diblock (B′-A′) represented by the following Formula I,
- a hydrocarbon adhesive resin, and
- a plasticizer
- [A-B-A′]n[B′-A′]m [1]
- wherein A and A′ are vinyl aromatic monomer polymers,
- B and B′ are conjugated diene polymers,
- n and m are independently a weight average mixed ratio of a triblock [A-B-A′] and a diblock [B′-A′] (here, n+m=100 weight %, and n≧m, m≧1),
- wherein the weight average molecular weight of the diblock is smaller than that of the triblock and is larger than that of A constituting the triblock,
- wherein the molecular weight distribution (MWD) of the diblock is larger than 1.1 and smaller than 2.0,
- wherein the diblock has two or more peak molecular weights (Mp).
7 more elements
Dependencies are inferred from the claim text.