| abstract |
Block copolymer rubber when tackified with a resin obtained by copolymerising using a Friedel Crafts catalyst a mixture of:n (i) 5 to 55 wt % of a feed comprising C₅ olefines and/or diolefines, and/or C₆ olefines and/or diolefines and/or a mixture of C₅ and C₆ olefines and/or diolefines, (ii) 5 to 55 wt % of a terpene and (iii) 3 to 55 wt % of an olefinically unsaturated aromatic compound said mixture containing less than 2 wt % of cyclopentadiene or diculcopentadiene provide excellent hot melt pressure sensitive adhesives providing the softening point of the resin is below 75° C. |