초록 ▼

An improved hot-melt pressure-sensitive adhesive (HMPSA) composition contains an elastomeric component, such as a blend of SIS and SB block copolymers, and a tackifying component comprising one or more intermediate softening point resins (ISPRs) having a ring and ball softening point of from 35 to 6

An improved hot-melt pressure-sensitive adhesive (HMPSA) composition contains an elastomeric component, such as a blend of SIS and SB block copolymers, and a tackifying component comprising one or more intermediate softening point resins (ISPRs) having a ring and ball softening point of from 35 to 60.degree. C. The improved adhesive compositions are characterized by reduced volatility, less bleed and staining tendencies, and improved overall adhesive performance. The invention also provides improved label constructions in which a release liner is coated with an HMPSA composition and laminated to a flexible facestock. Notably, even when low basis weight paper facestocks are used, the construction can be converted at high speeds.

대표청구항 ▼

[ What is claimed is:] [1.]1. A hot melt pressure-sensitive adhesive (HMPSA) composition, comprising:(a) one or more styrene-butadiene (SB) block copolymers;(b) one or more styrene-isoprene-styrene (SIS) block copolymers, or a mixture of SIS and styrene-isoprene (SI) block copolymers; and(c) a tacki

[ What is claimed is:] [1.]1. A hot melt pressure-sensitive adhesive (HMPSA) composition, comprising:(a) one or more styrene-butadiene (SB) block copolymers;(b) one or more styrene-isoprene-styrene (SIS) block copolymers, or a mixture of SIS and styrene-isoprene (SI) block copolymers; and(c) a tackifying component having a ring and ball softening point of from about 35 to 60.degree. C. and an aromatic content of from about 5 to 25% by weight, made by copolymerizing at least one C.sub.5 monolefin or diolefin with at least one C.sub.8 or C.sub.9 monoalkenyl aromatic hydrocarbon; andwherein the weight ratio of (a):(b) ranges from about 0.5:1 to 2:1.