polymer displays a tack of 128 g while the comparative polymer displays a tack of only 55 g moreover the peel strength of the inventive isocyanate extended telechelic polymers can be tailored by judicious selection of monomer ingredients and degree of reaction thus the inventive isocyanate extended telechelic polymers can be synthesized to higher molecular weights to retain their strength by dint of the increased molecular weight while also retaining a much high peel strength that heretofore would be expected of much lower molecular weight polymers truly an unusual blend of performance characteristics are demonstrated by these data additional hydroxy functional block copolymers and their chain extended derivatives were synthesized by the procedures described above as follows table 4__________________________________________________________________________example monomers initiator terminator mn mw mw mn__________________________________________________________________________26 ba mma ba 2 h2pn allyl oh 23 000 44 000 1 9 1 8 mmol 110 mmol 27 ba sty ba 2 h2pn pentene oh 23 000 50 000 2 19 1 8 mmol 210 mmol __________________________________________________________________________ sty is styrene table 5__________________________________________________________________________table 5 nco oh chain extension ex no ex no mn mw eq data mw mn__________________________________________________________________________28 26 23 000 44 000 1 2 66 516 281 798 4 24 29 27 23 000 50 000 1 2 74 878 325 715 4 35__________________________________________________________________________ a comparison between the melt viscosities and cohesive strengths of conventional hot melt acrylic polymers and the new hot melt polymers described in table 6 is set forth below table 6 sup a______________________________________ relative melt.