US Patent Issued to SHIN-ETSU CHEMICAL on April 21 for "Silicone rubber sponge composition and producing method thereof" (Japanese Inventors)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,687, issued on April 21, was assigned to SHIN-ETSU CHEMICAL Co. LTD. (Tokyo).

"Silicone rubber sponge composition and producing method thereof" was invented by Satao Hirabayashi (Takasaki, Japan), Tomoya Minamikawa (Takasaki, Japan), Mikio Iino (Takasaki, Japan) and Nobumasa Tomizawa (Annaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A silicone rubber sponge composition, including: (A) 100 parts by mass of an addition-crosslinkable silicone rubber composition containing a reinforcing silica and being liquid at 25deg C.; (B) 1.0 to 20 parts by mass of expanded resin fine particles having a specific gravity of 0.01 to 0.3, having an averag...