HOT MELT ADHESIVE

To provide an olefin hot melt adhesive which is excellent in balance of initial adhesive strength, holding power and releasability and useful as an adhesive.SOLUTION: There is provided a hot melt adhesive containing (A) a metallocene-based propylene homopolymer, (B) a metallocene-based ethylene-α-ol...

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Hauptverfasser: MAEDA NAOHIRO, TSUNODA ATSUSHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide an olefin hot melt adhesive which is excellent in balance of initial adhesive strength, holding power and releasability and useful as an adhesive.SOLUTION: There is provided a hot melt adhesive containing (A) a metallocene-based propylene homopolymer, (B) a metallocene-based ethylene-α-olefin copolymer, (C) a tackifier resin and (D) a plasticizer, where the (D) plasticizer contains (D1) oil and (D2) at least one polymer selected from a polybutene, a polybutadiene, a polyisobutylene and polyisoprene. The hot melt adhesive has initial adhesiveness large enough to easily stick an adhesive body to a member, as a result, can firmly hold the adhesive body to the member and is further excellent in releasabilty and thus generates no paste residues on the member when peeling off the adhesive body from the member.SELECTED DRAWING: None 【課題】初期接着強度、保持力、剥離性のバランスに優れ、粘着剤として有用なオレフィンホットメルト接着剤を提供する。【解決手段】(A)メタロセン系プロピレンホモポリマー、(B)メタロセン系エチレン/α−オレフィンコポリマー、(C)粘着付与樹脂および(D)可塑剤を含み、(D)可塑剤が、(D1)オイルと、(D2)ポリブテン、ポリブタジエン、ポリイソブチレンおよびポリイソプレンから選択される少なくとも1種の重合体を含む、ホットメルト接着剤である。このホットメルト接着剤は、粘着体を部材へ容易に貼り付けることが可能な大きさの初期接着性を持ち、その結果、粘着体を部材へしっかり保持できるが、さらに剥離性にも優れるので、粘着体を部材から剥がす際に部材に糊残りを生じない。【選択図】なし