METHOD OF STABILIZATION OF BUTYLRUBBER Russian patent published in 2002 - IPC

FIELD: rubber industry, chemical technology. SUBSTANCE: main problem in methods of synthesis of unsaturated rubbers, among them and butylrubber, is the selection and addition of antioxidants in the process of synthesis of rubber that ensures to obtain colorless rubber exhibiting the resistance in storage and processing. Invention proposes a method of stabilization of butylrubber involving the addition a stabilizing agent for degassing where butylated product of interaction of para-cresol with dicyclopentadiene (Wingstay-L) with molecular mass 550-750 Da taken in the amount 0.2-1.5 kg/t is used in a mixture of fatty acid salt and metal of the 2-d group of periodic system at the ratio Wingstay-L : fatty acid salt = 0.015-0.3. Feeding fatty acid salt to rubber crumbs before addition of an antioxidant to its is possible. EFFECT: improved method of stabilization. 2 cl, 1 tbl