US2002164446A1PendingUtilityA1

Pressure sensitive adhesives with a fibrous reinforcing material

49
Priority: Jan 17, 2001Filed: Jan 17, 2001Published: Nov 7, 2002
Est. expiryJan 17, 2021(expired)· nominal 20-yr term from priority
Inventors:Zhiming ZhouAlbert I. Everaerts
C09J 11/08C09J 7/38Y10T428/1486Y10T428/1405B33Y 80/00Y10T428/14A61L 15/58Y10T428/1481C09J 2301/302C08L 2666/02Y10T428/1452C09J 2301/308Y10T428/28C09J 7/10C09J 2433/00C08L 2205/16C09J 133/06Y10T428/24942Y10T428/1462
49
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

This invention is directed to a fiber reinforced adhesive composition comprising a pressure sensitive adhesive matrix and a fibrous reinforcing material within the pressure sensitive adhesive matrix. The adhesive composition has a yield strength and a tensile strength. The tensile strength is at least about 150% of the yield strength. Generally, the adhesive composition exhibits these properties at least 50% elongation when measured according to ASTM D 882-97 at a crosshead speed of 12 inches/minute (30 centimeters/minute).

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . An adhesive composition comprising 
 a pressure sensitive adhesive matrix; and    a fibrous reinforcing material within the pressure sensitive adhesive matrix;    wherein the adhesive composition has a yield strength and a tensile strength, and wherein the tensile strength is about 0.7 MPa or greater, and at least about 150% of the yield strength.    
     
     
         2 . The adhesive composition of  claim 1  wherein the fibrous reinforcing material comprises substantially continuous fibers.  
     
     
         3 . The adhesive composition of  claim 1  wherein the adhesive composition has an elongation at break of at least about 50%.  
     
     
         4 . The adhesive composition of  claim 1  wherein the adhesive composition has an elongation at break of at least about 300%.  
     
     
         5 . The adhesive composition of  claim 1  wherein the adhesive composition has a tensile strength of about 0.8 MPa or greater.  
     
     
         6 . The adhesive composition of  claim 1  wherein the adhesive composition has a yield strength of no less than about 0.1 MPa.  
     
     
         7 . The adhesive composition of  claim 1  wherein the adhesive composition has a yield strength of no less than about 0.2 MPa.  
     
     
         8 . The adhesive composition of  claim 1  wherein the pressure sensitive adhesive comprises about 60 to about 95 weight % of the adhesive composition and the reinforcing material comprises about 5 to about 40 weight % of the adhesive composition.  
     
     
         9 . The adhesive composition of  claim 1  wherein the pressure sensitive adhesive comprises about 70 to about 95 weight % of the adhesive composition and the reinforcing material comprises about 5 to about 30 weight % of the adhesive composition.  
     
     
         10 . The adhesive composition of  claim 1  wherein a ratio of the reinforcing material melt viscosity to the pressure sensitive adhesive melt viscosity is about 0.5 to about 1.2.  
     
     
         11 . The adhesive composition of  claim 1  wherein the fibrous reinforcing material comprises at least one fiber having a diameter of less than about 5 micrometers.  
     
     
         12 . The adhesive composition of  claim 1  wherein the fibrous reinforcing material comprises at least one fiber having an aspect ratio of greater than about 1000.  
     
     
         13 . The adhesive composition of  claim 1  wherein the pressure sensitive adhesive comprises a pressure sensitive adhesive based on at least one of a natural rubber, synthetic rubber, styrene block copolymer, polyvinyl ether, poly(meth)acrylate, polyolefin, silicone or combinations thereof.  
     
     
         14 . The adhesive composition of  claim 1  wherein the pressure sensitive adhesive comprises a polymer derived from at least one alkyl (meth)acrylate ester monomer selected from isooctyl acrylate, 2-ethyl-hexyl acrylate, and n-butyl acrylate; and at least one co-monomer selected from acrylic acid and acrylamide.  
     
     
         15 . The adhesive composition of  claim 1  wherein the reinforcing material comprises an elastomer having a yield strength no greater than about 20 MPa and a tensile strength of at least about 150% of the yield strength.  
     
     
         16 . The adhesive composition of  claim 1  wherein the reinforcing material comprises a semi crystalline polymer.  
     
     
         17 . The adhesive composition of  claim 1  wherein the reinforcing material has a melting point greater than about 70° C.  
     
     
         18 . A substrate at least partially coated with the adhesive composition of  claim 1 .  
     
     
         19 . The substrate of  claim 18  wherein the substrate comprises a release liner.  
     
     
         20 . A tape comprising 
 a backing having a first and second side; and    the adhesive composition of  claim 1  coated on at least a portion of the first side of the backing.    
     
     
         21 . A tape comprising 
 a backing having a first and second side; and    the adhesive composition of  claim 1  coated on at least a portion of the first side of the backing and, optionally, on at least a portion of the second side of the backing.    
     
     
         22 . A stretch removable article comprising the adhesive composition of  claim 1 .  
     
     
         23 . The adhesive composition of  claim 1  wherein the adhesive composition is stretch removable from a substrate.  
     
     
         24 . An adhesive composition comprising 
 a pressure sensitive adhesive matrix; and    a fibrous reinforcing material, having a melting temperature of no less than about 70° C., within the pressure sensitive adhesive matrix;    wherein the adhesive composition has a yield strength and a tensile strength, and the tensile strength is at least about 150% of the yield strength.    
     
     
         25 . A method for making a fiber reinforced adhesive composition comprising 
 (a) forming a mixture comprising a pressure sensitive adhesive with a reinforcing material capable of forming fibers when subjected to an elongating shear force; and    (b) subjecting the mixture to the elongating shear force to form the adhesive composition of  claim 1 .    
     
     
         26 . The method of  claim 25  further comprising quenching the adhesive composition.  
     
     
         27 . The method of  claim 25  wherein the reinforcing material is elastomeric.  
     
     
         28 . The method of  claim 25  wherein the reinforcing material is semi-crystalline.  
     
     
         29 . A medical article comprising the adhesive composition of  claim 1 .  
     
     
         30 . The medical article of  claim 29  which is in the form of a wound dressing, surgical dressing, medical tape, athletic tape, or surgical tape.  
     
     
         31 . The medical article of  claim 29  which is in the form of a sensor, an electrode, or an ostomy appliance.

Join the waitlist — get patent alerts

Track US2002164446A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.