The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 1998
Filed:
Jun. 02, 1994
Ralf Korpman, Bridgewater, NJ (US);
Vera Korpman, Bridgewater, NJ (US);
Michael Korpman, Longwood, FL (US);
Dennis Korpman, Beaumont, TX (US);
Ralf Korpman Associates, Inc., Yalaha, FL (US);
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.