ADHESIVE COMPOSITIONS WITH AMORPHOUS POLYOLEFINS

摘要

The invention relates to a hot melt adhesive composition that, when used as an elastic attachment adhesive (EAA), provides elastic laminates having an initial creep performance of less than 25%. The composition comprises a selectively hydrogenated, high vinyl block copolymer having the structure SEBS or (SEB)nX amorphous polyolefin such as polyethylene, polypropylene, butylene homopolymers and copolymers, or a mixture of two or more of these, tackifier, and maleated polypropylene oligomer or maleated SEBS.

主权项

1. A composition comprising:
a) 10 to 20 wt. % of a selectively hydrogenated block copolymer having the structure SEBS or (SEB)nX wherein S represents a poly(monoalkenyl arene) block, EB represents a hydrogenated polybutadiene block, n is an integer from 2 to about 30 and X is the residue of a coupling agent, and wherein the block copolymer has a vinyl content of greater than 50% before selective hydrogenation and 10 wt. % or less of diblock polymer is present; b) 40 to 50 wt. % of an amorphous polyolefin; c) 25 to 35 wt. % of a tackifier; and d) 3 to 8 wt. % of a maleated polypropylene oligomer or maleated SEBS where the total composition is 100 wt. %.