Pressure-sensitive adhesives based on preferentially tackified i

Details Pressure-sensitive adhesives based on preferentially tackified i Pressure-sensitive adhesives based on preferentially tackified i

1997-08-29

1999-01-05

Nagumo, Mark

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524481, 524485, 524505, 524526, C09J 1108, C09J15302

Patent

active

058563873

ABSTRACT:
A pressure sensitive adhesive of a mutually immiscible first elastomer (styrene-butadiene block copolymer) exhibiting a first glass transition temperature and a second elastomer (e.g., a styrene-isoprene-styrene block copolymer) exhibiting a second glass transition temperature greater than the first is tackified by a tackifying system comprising tackifier preferentially miscible with the second elastomer to provide a dynamic mechanical spectrum plot of tangent delta versus temperature in .degree.C. showing two separate and distinct glass transition temperature peaks. The mixture exhibits excellent processability and ambient and low temperature adhesive properties.

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