Patents Assigned to Massachusetts Inst. Tech.
  • Method of making rubber-modified rigid silicone resins and composites produced therefrom
    Patent number: 5830950
    Abstract: Novel rubber-modified rigid silicone resins a novel method of making the same are disclosed. The resins are the copolymerized reaction product of (A) an organosilicon composition selected from the group consisting (I) an organosilicone resin, (II) hydrolyzable precursors of (I), and an hydrolyzate of (II) and (B) an silicone rubber. In the method of the invention, the copolymerization step is carried out in an organic solvent, preferably utilizing a relatively weak condensation catalyst. Thereafter, the solution is devolatilized and the composition cured by heating.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: November 3, 1998
    Assignees: Dow Corning Corporation, Massachusetts Inst. Tech.
    Inventors: Dimitris Elias Katsoulis, John Robert Keryk, Frederick Jerome McGarry, Bizhong Zhu
  • Rubber-modified rigid silicone resins and composites produced therefrom
    Patent number: 5747608
    Abstract: Novel rubber-modified rigid silicone resins are disclosed. The novel resins are the copolymerized reaction product of (A) an organosilicon composition selected from the group consisting (I) an organosilicone resin, (II) hydrolyzable precursors of (I), and an hydrolyzate of (II) and (B) an silicone rubber. The novel rubber-modified rigid silicone resins of the invention show remarkably high fracture toughness, K.sub.Ic, and critical strain energy release rate G.sub.Ic.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: May 5, 1998
    Assignees: Dow Corning Corporation, Massachusetts Inst. Tech.
    Inventors: Dimitris Elias Katsoulis, John Robert Keryk, Frederick Jerome McGarry, Randall Gene Schmidt, Ramnath Subramanian, Harold Lewis Vincent, Bizhong Zhu