| 摘要 |
PURPOSE:The titled composition, having improved adhesive property, heat stability and low-temperature characteristics, and comprising a specific tackifier resin, an ethylenic copolymer and a wax as essential constituents. CONSTITUTION:A composition comprising (A) a tackifier resin consisting of an aromatic hydrocarbon resin having 60-120 deg.C softening point obtained by polymerizing a mixture of (i) 100pts.wt. a fraction with a conjugated diolefin content <=0.7wt% and its ratio* <=3%, indene (alkyl derivative) content <=2wt% and its ratio* <=8% and a vinyltoluene content of 60-90% prepared by distilling a fraction boiling at 140-220 deg.C of a cracked oil fraction with (ii) 5- 40pts.wt. a 9- 20C branched chain aliphatic olefin fraction as a raw material oil in the presence of (iii) 0.1-3.0pts.wt. a phenol and 0.01-5.0wt%, based on the raw material oil, a Friedel-Crafts catalyst at -30-60 deg.C, (B) an ethylenic copolymer and (C) a wax as essential constituents. [X The ratio is defined as follows: Ratio (%)=conjugated diolefin or indence (alkyl derivative) content (wt%) in cracked oil/polymerizable component content (wt%) in cracked oil]. |
