High flow, hydrogenated styrene-butadiene-styrene block copolymers and applications

摘要

The invention relates to unique applications for the novel high melt flow, low viscosity, selectively hydrogenated styrene-butadiene-styrene (hSBS) or selectively hydrogenated controlled distribution styrene-butadiene/styrene-styrene (hSBSS) block copolymers, wherein the melt flow rate of said block copolymer is at least 100 g/10 min at 230° C. under 2.16 kg mass according to ASTM D1238. These block copolymers are novel and have the highest melt flow rate of any styrenic block copolymer also possessing high strength and elasticity. It has applications that prior to the present invention were not normally possible due to the normal low melt flow rate of styrenic block copolymers. The present invention also encompasses various fields of use such as a fiberglass hSBS or hSBSS reinforced mat, low viscosity hSBS or hSBSS coatings for industrial uses, hot melt adhesives prepared from hSBS or hSBSS blended with polyalpha-olefins, and elastic film, fiber, and nonwoven constructions using hSBS or hSBSS.

主权项

1. A non-pressure sensitive adhesive composition intended for use as a personal hygiene construction adhesive, elastic attachment adhesive, and hot-melt adhesive comprising: a blend of poly-alpha-olefin, styrenic block copolymer, and tackifying resin, said styrenic block copolymer having a melt flow rate greater than about 125 g/10 min at 230° C., and 2.16 kg mass, said styrenic block copolymer being selectively hydrogenated styrene-diene-styrene or selectively hydrogenated controlled distribution styrene-diene/styrene-styrene, where the diene is butadiene, isoprene, or mixtures thereof.