| 摘要 |
Acrylic based adhesives and constructions are described and claimed. The adhesives comprise on a copolymerized basis, (A) from about 50 to about 90% by weight of at least one alkyl acrylate, alkyl methacrylate, and mixtures thereof, wherein the alkyl group contains at least four carbon atoms, (B) from about 10% to about 30% by weight of at least one ethylenically unsaturated carboxylic acid or anhydride monomer, and (C) from about 0 to about 40% by weight of a monoethylenically unsaturated comonomer selected from styrene and substituted styrenes; alkyl acrylates and alkyl methacrylates containing less than 4 carbon atoms in the alkyl group; vinyl acetate; N-vinyl lactams; acrylonitrile; glycidyl containing monomers; hydroxyalkyl, alkoxyalkyl and phenoxyalkyl acrylates and methacrylates wherein the hydroxyalkyl, alkoxyalkyl and phenoxyalkyl groups contain from 2 to about 12 carbon atoms in the alkyl groups and from 1 to about 6 carbon atoms in the alkoxy groups; cyclic and heterocylic acrylates and methacrylates; and mixtures of two or more thereof. The acrylic based adhesives of the invention exhibit desirable sound/vibration damping properties.
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