STORAGE STABLE ORGANOSILOXANE COMPOSITION AND METHOD FOR PREPARING SAME

• Main Authors: MULLAN, STEVEN P, LEE, CHI-LONG, REESE, HERSCHEL H, BILGRIEN, CARL J
• Format: Patent
• Language: English; French
• Published: 13.05.1993
• Edition: 5
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

STORAGE STABLE ORGANOSILOXANE COMPOSITION AND METHOD FOR PREPARING SAME Storage stable and gel-free organosiloxane compositions in the form of flowable powders are prepared by blending a high consistency polydiorganosiloxane into a quantity of fluidized reinforcing filler that is heated to a temperature of from 100 to 200.degree.C. prior to or immediately following introduction of the polydiorganosiloxane. When silica is the reinforcing filler, the filler is typically treated with an anti-creping agent either prior to or during this blending process. The resultant mixture is heated while being subjected to shearing forces that reduce its average particle size to achieve a flowable powder.