Hot Melt Adhesive

• US 20110021102A1
• Filed: 09/30/2010
• Published: 01/27/2011
• Est. Priority Date: 03/31/2009
• Status: Abandoned Application

• Current Assignee: Keiko Ide, Kentarou Inoue
• Original Assignee: Keiko Ide, Kentarou Inoue
• Inventors: Ide, Keiko, Inoue, Kentarou
• Application Number:
  US12/894,849
• Publication Number:
  US 20110021102A1
• Time in Patent Office: Days
• US Class Current: 442/327
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 45/02 of coumarone-indene polymers
• CPC Class Codes: C08L 53/025 modified
• CPC Class Codes: C08L 57/02 Copolymers of mineral oil hydrocarbons
• CPC Class Codes: C09J 123/14 Copolymers of propene C09J123/16 takes precedence
• CPC Class Codes: Y10T 442/60 Nonwoven fabric [i.e., nonwoven strand or fiber material]

Abstract

A hot melt adhesive is provided that has low viscosity, a high softening point, superior heat resistance, and a high degree of adhesive strength and adhesion stability at high temperatures. The adhesives of the invention comprise (A) an amorphous alpha olefin, (B) a crystalline poly-alpha olefin and (C) hydrogenated thermoplastic block copolymer which are copolymers with vinyl aromatic hydrocarbons and conjugated diene compounds. The adhesive is particularly useful in the manufacture of articles including laminations.

Claims

1. A hot melt adhesive comprising

(A) a non-crystalline poly-α

-olefin,

(B) a crystalline poly-α

-olefin obtained by polymerizing an α

-olefin in the presence of a metallocene catalyst, and

(C) a hydrogenated thermoplastic block copolymer which is a copolymer of a vinyl-based aromatic hydrocarbon and a conjugated diene compound.

2. The hot melt adhesive of claim 1, wherein the (C) hydrogenated thermoplastic block copolymer is a hydrogenated styrene-isoprene-styrene block copolymer.

3. The hot melt adhesive of claim 1 wherein the (B) crystalline poly-α

-olefin is present in a ratio of 10-40 weight parts of 100 weight parts of the combined (A), (B) and (C).

4. An article comprising the hot melt adhesive of claim 2.

5. The article of claim 4 which is a laminated article.

6. The article of claim 5 comprising a nonwoven sheet bonded to a plastic film.

7. The article of claim 5 which is a vapor permeable laminate.

8. The article of claim 5 which is waterproof laminate.