HEAT-STABLE PETROLEUM RESINS, A PREPARATION METHOD THEREFOR, AND USES THEREOF FOR FORMULATING HOT-MELT ADHESIVES

摘要

Resins including a copolymer which essentially comprises 81-99 % wt. of alkenylaromatic units and 1-19 % wt. of terpene units, and further characterized in that they contain 0.1-0.7 % of hydrogens bonded to non-aromatic unsaturated carbons. A method for preparing the resins comprises a first step of treating a cut of alkenylaromatic monomers to remove essentially all the chromophoric compounds which might dye the resin and/or spoil its properties, and a second step of cationically copolymerizing a mixture which comprises (a) 88-99 % wt. of treated cut resulting from the first step, and (b) 1-12 % wt. of a cut which includes at least one terpene monomer. Said resins are useful as components for adhesive formulations.