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...
Patent
1992-07-27
1994-03-01
Schofer, Joseph L.
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, C09J 1108, C09J15302
Patent
active
052908429
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.
REFERENCES:
patent: 4104327 (1978-08-01), Inoue et al.
patent: 4288480 (1981-09-01), Grywinski et al.
patent: 4325770 (1982-04-01), Korpman
Sax, N. and Lewis, Sr., R., Hawley's Condensed Chemical Dictionary, 11th Ed., pp. 932, 938.
Skeist, I., Handbook of Adhesives, Van Nostrand Reinhold Co., 3rd. Ed., pp. 641-662.
Ercillo Jesse
Sasaki Yukihiko
Avery Dennison Corporation
Delmendo R. H.
Schofer Joseph L.
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