Organopolysiloxane adhesive and pressure-sensitive adhesive tape containing same

• US 2,814,601 A
• Filed: 04/29/1954
• Issued: 11/26/1957
• Est. Priority Date: 04/29/1954
• Status: Expired due to Term

• Current Assignee: Chester C. Currie, Joseph W. Keil
• Original Assignee: Chester C. Currie, Joseph W. Keil
• Inventors: Currie, Chester C., Keil, Joseph W.
• Application Number:
  US03/426,554
• Time in Patent Office: 1,307 Days
• US Class Current: 528/18
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09J 183/04 Polysiloxanes
• CPC Class Codes: C09J 7/21 Paper; Textile fabrics
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/2852 Adhesive compositions
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Claims

1. A COMPOSITION OF MATTER COMPOSED ESSENTIALLY OF (1) FROM 40 TO 75% BY WEIGHT OF A BENZENE SOLUBLE RESIN COPOLYMER OF SIO2 UNITS AND R3SIO5 UNITS WHERE R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, PROPYL, VINYL AND PHENYL RADICALS, AT LEAST 90% OF THE TOTAL R RADICALS BEING ALIPHATIC AND IN WHICH COPOLYMER THE RATIO OF R3SIO5 UNITS TO SIO2 UNITS IS FROM 0.6:

1 TO 0.9;

1 INCLUSIVE AND (2) FROM 25 TO 60% BY WEIGHT OF A HYDROXYL END-BLOCKED DIORGANOPOLYSILOXANE FLUID OF FROM 5,000 TO LESS THAN 1,000,000 CS. VISCOSITY AT 25*C. IN WHICH FLUID THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, VINYL AND PHENYL RADICALS, AT LEAST 75% OF THE TOTAL NUMBER OF ORGANIC RADICALS BEING ALIPHATIC.