ACRYL COPOLYMER FOR MANUFACTURE OF VIBRATION-ABSORBING MATERIAL AND PROCESS FOR EFFECTING SAME Russian patent published in 1994 - IPC

FIELD: chemistry. SUBSTANCE: acryl copolymer including 21.5 to 31.9 mole percent vinylacetate, 65.1 to 76.5 mole percent butylacrylate and 1.0 to 4.8 mole percent 1-methacryloyloxy-1-tert-butylperoxyethane has intrinsic viscosity of 0.54 to 1.22 dl/g in acetone at temperature of 20 C. Copolymer is produced by method of water-emulsion polymerization of monomer mixture admitted into reaction zone at constant rate of 28.5 to 50.0 % of total charge per 1 h in presence of 0.8 to 6.0 percent by mass emulsifier and water-soluble initiator charged by equal portions at equal intervals of 24 to 42 min. EFFECT: excellent stock for manufacture of vibration-absorbing materials. 3 cl, 2 tbl