Organo-silicone block copolymers

Abstract

Abstract THIS INVENTION RELATES TO BLOCK COPOLYMER COMPOSITIONS COMPRISING AT LEAST ONE SILOXANE BLOCK AND AT LEAST ONE OXYALKYLENE BLOCK, (I) THE SILOXANE BLOCK (A) BEING A SILOXANE POLYMER COMPOSED OF DIFUNCTIONAL SILICON ATOMS OR BOTH DIFUNCTIONAL SILICON ATOMS AND AT LEAST ONE TRIFUNCTIONAL SILICON ATOM (EACH DIFUNCTIONAL SILICON ATOM BEING LINKED TO TWO MONOVALENT HYDROCARBON GROUPS AND TWO OXYGEN ATOMS AND EACH TRIFUNCTIONAL SILICON ATOM BEING LINKED TO A HYDROCARBON GROUP AND THREE OXYGEN ATOMS) THAT ARE JOINED THROUGH SILICON-OXYGEN-SILICON BONDS AND (B) BEING LINKED AT ONE END TO THE OXYALKYLENE BLOCK BY A CARBON-OXYGEN-SILICON BOND AND AT THE OTHER END TO A MEMBER SELECTED FROM THE GROUP CONSISTING OF (1) ANOTHER OF SAID OXYALKYLENE BLOCKS BY A CARBON-OXYGEN-SILICON BOND, (2) A TRIHYDROCARBONSILOXY GROUP AND (3) AN ALKOXY GROUP; AND (II) THE OXYALKYLENE BLOCK (A) BEING AN OXYALKYLENE POLYMER HAVING AT LEAST FIVE OXYALKYLENE UNITS JOINED TOGETHER BY CARBON-OXYGEN-CARBON BONDS AND (B) BEING BONDED AT ONE END TO SAID SILOXANE POLYMER THROUGH A CARBON-OXYGEN-SILICON BOND AND AT THE OTHER END TO EITHER (1) ANOTHER OF SAID SILOXANE BLOCKS BY A CARBONOXYGEN SILICON BOND OR (2) A HYDROXYL GROUP, PROVIDED AT LEAST ONE OXYALKYLENE BLOCK IS BONDED AT ONE END TO A HYDROXYL GROUP. THE BLOCK COPOLYMERS OF THIS INVENTION ARE USEFUL AS LUBRICANTS FOR METALS, FIBROUS GLASS, RUBBER MOLDS AND TEXTILES, HYDRAULIC FLUIDS, EMULSIFYING AGENTS, SURFACE TENSION DEPRESSANTS AND FOAM STABILIZERS FOR POLYURETHANE FOAM.

Inventors

• 👤 Donald L Bailey
• 👤 Francis M O'connor

Bibliographic Details