method for preparation of mixtures with increased kleefkracht on the basis of rubbery polymers of etheen,at least another alpha olefin and possibly one or more polyenen minded and sticky resins.

摘要

A rubbery copolymer of ethylene, =1 other alpha-alkylene (e.g. propylene and/or butene-1) and opt. =1 polyene(s) (e.g. dicyclopentadiene and/or 5-ethylidene norbornene-2) is characterised by a thermogram recorded by differential scanning calorimetry at a cooling rate of 8 degrees C/min. into which the heat of crystallisation is entered as a function of temp. and which has a peak indicating a maximum at between -7 and +11 degrees C. Used in compsns. contg. a tackifier e.g. an alkylated phenolic resin, and which have good self-adhesion.