| 摘要 |
<p>The invention comprises a hydrogenated hydrocarbon resin suitable as tackifier for acrylic adhesive polymers, having greater than 20 % aromatic protons after hydrogenation, a z-average molecular weight of less than about 1800, a narrow molecular weight distribution, typically of less than or equal to 2.1, and a softening point of from 40 °C to about 120 °C. It additionally comprises a method for preparing a hydrogenated aromatic tackifier resin suitable as tackifier for acrylic adhesive polymers comprising the steps of: a) polymerizing under Friedel-Crafts polymerization conditions steam-cracked petroleum distillates, or fractions thereof, having boiling points between about 135 °C and 220 °C and containing at least 40 % of by weight vinyl aromatic monomer contents, in the presence of a chain transfer agent: and b) catalytically hydrogenating the results of a) such that at least 75 % of the aromticity is retained. The invention also comprises the use of this hydrogenated hydrocarbon resin as tackifier for an adhesive composition comprising one or more adhesive base polymers selected from acrylic copolymers, styrene block copolymers and ethylenevinyl ester copolymers wherein improved adhesive properties are observed.</p> |
