Janet L Elias

US Patent:

41169190, Sep 26, 1978

Filed:

Sep 6, 1977

Appl. No.:

5/830527

Inventors:

Janet L. Elias - Midland MI
Chi-Long Lee - Midland MI
Myron T. Maxson - Sanford MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

C08L 8304

US Classification:

260 37SB

Abstract:

An improved treatment for reinforcing silica uses both a silazane represented by the formula (RR'R"Si). sub. 2 NH and bis-Si-(1-methyl-1-silacyclopentenyl) amine as filler treatment. The filler treatment may be done either in situ during the manufacture of curable silicone elastomer compositions or as a separate operation. The treatment allows production of an easily extrudable composition with improved durometer and tear strength.