Silicone pressure-sensitive adhesive tape

• US 2,882,183 A
• Filed: 05/21/1956
• Issued: 04/14/1959
• Est. Priority Date: 05/21/1956
• Status: Expired due to Term

• Current Assignee: Gaylord L. Groff, Herbert M. Bond
• Original Assignee: Gaylord L. Groff, Herbert M. Bond
• Inventors: Bond, Herbert M., Groff, Gaylord L.
• Application Number:
  US03/586,274
• Time in Patent Office: 1,058 Days
• US Class Current: 442/151
• CPC Class Codes: C09J 2421/006 in the substrate
• CPC Class Codes: C09J 2483/00 Presence of polysiloxane
• CPC Class Codes: C09J 2483/005 in the release coating
• CPC Class Codes: C09J 7/201 characterised by the release coating composition on the carrier layer
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/2852 Adhesive compositions
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 442/2754 Pressure-sensitive adhesive

Claims

1. A STABLE PRESSURE-SENSITIVE SILICONE ADHESIVE SHEET MATERIAL, THE PRESSURE-SENSITIVE ADHESIVE SURFACE OF WHICH RETAINS ITS PRESSURE-SENSITIVE ADHESIVE PROPERTIES AFTER PROLONGED STORAGE IN DIRECT CONTACT WITH THE BACK SURFACE OF SAID SHEET MATERIAL, SAID SHEET MATERIAL COMPRISING A BACKING INCLUDING A LAYER OF A FLEXIBLE SILICONE ELASTOMER, A PRESSURE-SENSITIVE SILICONE ADHESIVE FIRMLY ADHERENTLY BONDED TO ONE SIDE OF SAID BACKING, AND A NON-TACKY BARRIER BACKSIZE FILM FIRMLY ADHERENTLY BONDED TO THE OTHER SIDE OF SAID BACKING, SAID BACKSIZE FILM COMPRISING AN IN SITU HEAT-CURED MIXTURE OF COMPONENTS COMPRISING A SILICONE RESIN AND A CATALYTIC CURING AGENT WHICH PROMOTES POLYMERIZATION OF SAID RESIN THROUGH SILCON BONDED HYDROXYL GROUPS THEREOF, SAID SILCONE RESIN BEING AN ORGANOPOLYSILIXANE IN WHICH THE RATIO OF MONOVALENT ORGANIC RADICALS TO SILICON ATOMS IS BETWEEN 1:

1 AND 1.8;

1, THE WEIGHT PERCENT OF SILICON BONDED HYDROCYL GROUPS IS AT LEAST 0.01, AND THE WEIGHT PERCENT OF R2SIO5 GROUPS, WHERE R IS AN ORGANIC RADICAL, IS LESS THAN 10.