US Patent Issued to INEOS STYROLUTION GROUP on May 19 for "Small-cell polystyrene foams, and process for producing same" (German Inventors)

ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,693, issued on May 19, was assigned to INEOS STYROLUTION GROUP GMBH (Frankfurt am Main, Germany).

"Small-cell polystyrene foams, and process for producing same" was invented by Hans-Werner Schmidt (Bayreuth, Germany), Klaus Kreger (Wiesau, Germany) and Bastian Klose (Gottmadingen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a process for producing small-cell foams from a styrene-polymer component (S) and an additive of formula (I), wherein Z represents a C1-C5-alkylene group or an oxygen or sulfur atom, R1 and R2 represent, e.g., a C3-C12-alkyl residue, C3-C12-cycloalkyl residue or benzyl residue; and R3, R4, R5 an...