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.
Type:
Grant
Filed:
June 2, 1994
Date of Patent:
June 2, 1998
Assignee:
Ralf Korpman Associates, Inc.
Inventors:
Ralf Korpman, Vera Korpman, Michael Korpman, Dennis Korpman
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. 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.
Type:
Grant
Filed:
February 14, 1995
Date of Patent:
December 24, 1996
Assignee:
Ralf Korpman Associates, Inc.
Inventors:
Ralf Korpman, Vera Korpman, Michael Korpman, Dennis Korpman
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. 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.
Type:
Grant
Filed:
November 17, 1992
Date of Patent:
December 28, 1993
Assignee:
Ralf Korpman Associates
Inventors:
Ralf Korpman, Vera Korpman, Michael Korpman, Dennis Korpman