Patent ID: 7368494
Filing Date: 2008-05-06
Classification: C08F,Y10T

Abstract:
1. An emulsion composition for vibration damping materials which comprises (i) an emulsion obtained by polymerizing a monomer composition containing an unsaturated carboxylic acid monomer as an essential component and (ii) a crosslinking agent, wherein said monomer composition contains 0.1 to 20 mass % of an ethylenically unsaturated carboxylic acid monomer and 99.9 to 80 mass % of other copolymerizable ethylenically unsaturated monomer, said crosslinking agent is at least one oxazoline compound, and is used in the form of an aqueous dispersion with the aid of an emulsifier, wherein the emulsion has a glass transition temperature of −50 to 40° C., and loss factor (loss tangent: tan δ) of a damper formulation formulated by the emulsion composition for vibration damping materials is not less than 0.15.