Pressure sensitive adhesive

Details Pressure sensitive adhesive Pressure sensitive adhesive

1994-06-02

1998-06-02

Buffalow, E. Rollins

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

Synthetic resins

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

525 98, 525 99, C08L 5302

Patent

active

057601356

ABSTRACT:
This invention relates to a novel pressure sensitive adhesive formed of a liquid and solid rubber which is substantially resin free. Preferably the adhesive is formed of a weight ratio of solid rubber to liquid rubber of about 1:0.5 to about 1:7. When a thermoplastic rubber is used, an endblock associating resin can also be used with the block copolymer solid rubber composition for improving adhesion and hold properties of the composition. A minor amount of tackifier can be added without affecting the improved properties of the present invention. The adhesive can preferably be cross linked with a sulfur, sulfur-bearing agents, peroxide, isocyanate or an aluminum isopropylate composition. These adhesives exhibit improved adhesion in cold weather and oily surface applications and other properties. The pressure sensitive adhesives can be used in health care, industrial and drug delivery systems. The adhesives can be processed by a hot melt process for providing improved ecological benefits.

REFERENCES:
patent: 2999769 (1961-09-01), Korpman
patent: 4824512 (1989-04-01), Kohleta et al.
patent: 5356994 (1994-10-01), Koch
patent: 5427850 (1995-06-01), Gotoh et al.

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