VINYL ACETATE COPOLYMER GRAFTED ON BUTYL RUBBERS AS COMPONENT OF POLYMERIC LAYER OF VIBRATION-ABSORBING LAMINATED MATERIAL (VARIANTS), AND COMPOSITION FOR POLYMERIC LAYER OF VIBRATION-ABSORBING LAMINATED MATERIAL Russian patent published in 1997 - IPC

FIELD: chemistry of polymers. SUBSTANCE: claimed invention describes grafted vinyl acetate copolymers on butyl rubbers as component of polymeric layer of vibration-absorbing laminated material and composition for polymer layer of vibration-absorbing laminated material , the component of polymeric layer vibration absorbing laminated material is vinyl acetate copolymer grafted on butyl rubber of general formula: $$$ wherein a=98.0-98.4 mole%; b=1.5-1.8 mole%; c=0.1-0.2 mole%; R is $$$ wherein d=58-116 units; molecular weight of the main chain is $$$, or the component of polymeric layer of vibration-absorbing laminated material is vinyl acetate copolymer grafted on halogenated butyl rubber. Formula of the polymeric component; $$$ wherein $$$ is chlorine or bromine, n=98.5-98.8 mole%; m=1.1-1.3 mole%; I is 0.1-0.2 mole% is grafted vinyl acetate chain of formula: $$$ wherein f is polymerization degree of 58- 116. Molecular weight of the main chain is $$$. The claimed composition also describes composition for polymeric layer of vibration absorbing laminated material. The composition comprises three polymer compounds (wt parts): 60-70 copolymer of butyl acrylate, nitrile of acrylic acid and methacrylic acid and ethylene glycol dimethacrylate; 30-40 butyl methacrylate and methacrylic acid copolymer and 60-300 one of the above- described vinyl acetate copolymers grafted on halogenated butyl rubber. EFFECT: improved properties of the composition.