| 主权项 |
1. A multiphase polymer composition comprising
30-64 parts by weight of a comb-type graft copolymer (A) which is obtainable by polymerizing a comonomer mixture in the presence of at least one macromer selected from the group consisting of polymerizable ethylene-butylene, ethylene-propylene, ethylene-butylene-propylene and isobutylene macromers, and which forms a continuous acrylate phase and a discontinuous hydrocarbon phase Kw; and 36-70 parts by weight of at least two hydrocarbon compounds (B-1) and (B-2) soluble in said hydrocarbon phase Kw of said comb-type graft copolymer (A); wherein the comonomer mixture comprises: 2-7 weight percent, based on the combined weight of the comonomer mixture and of the at least one macromer, of at least one comonomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, itaconic anhydride, maleic acid, maleic anhydride and further monomers whose homopolymers have a static glass transition temperature (Tg), as measured by the DSC method, of more than 40° C.; and 43-97 weight percent, based on the combined weight of the comonomer mixture and of the at least one macromer, of at least two (meth)acrylate comonomers selected from the group consisting of monomers whose homopolymers have a static glass transition temperature (Tg), as measured by the DSC method of 40° C. or less; and wherein the at least two hydrocarbon compounds comprise a hydrocarbon resin (B-1) having a softening point of at least 70° C. and a hydrocarbon resin (B-2) having a softening point of at most 20° C. |
