Styrene-isoprene-styrene block copolymer composition and adhesiv

Details Styrene-isoprene-styrene block copolymer composition and adhesiv Styrene-isoprene-styrene block copolymer composition and adhesiv

1992-09-24

1995-01-03

Wu, Shean

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C08L 9100

Patent

active

H00014028

ABSTRACT:
A linear styrene-isoprene-styrene block copolymer composition comprised of linear polymeric blocks wherein the block copolymer composition has a coupling efficiency of 25 to 82 percent, a polystyrene content of from 19 to 27 percent by weight, a polystyrene block molecular weight (peak polystyrene equivalent molecular weight as determined by gel permeation chromatography) of 12,000 to 18,000, and an overall molecular weight (peak polystyrene equivalent molecular weight as determined by gel permeation chromatography) of from 170,000 to 280,000. The invention also contemplates adhesive formulations comprising these block copolymer compositions and a tackifying resin.

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