| 摘要 |
Adhesive composition comprises a block copolymer having at least one unit of the type ABA or BAB, where A is a homo- or copolymer block with a softening point of -80 to 0 degrees C comprising alkyl (meth)acrylate units and higher alkyl (meth)acrylate units with a molecular weight of 492-30000, B is a homo- or copolymer block with a softening point of 20-175 degrees C, and A and B are immiscible. Adhesive composition comprises a block copolymer having at least one unit of the type ABA or BAB, where A is a homo- or copolymer block with a softening point of -80 to 0 degrees C comprising units derived from alkyl (meth)acrylates of formula (I) and units derived from higher alkyl (meth)acrylates of formula (II) with a molecular weight of 492-30000, B is a homo- or copolymer block with a softening point of 20-175 degrees C, and A and B are immiscible. CH2=CH(R<1>)(COOR<2>) (I) CH2=CH(R<3>)(COOR<4>) (II) R<1>, R<3> = H or Me; R<2> = optionally substituted 1-20C linear, branched or cyclic (un)saturated alkyl; and R<4> = optionally substituted linear, branched or cyclic (un)saturated aliphatic group with more than 30 C atoms. An Independent claim is also included for a process for producing the adhesive composition, comprising preparing the block copolymer by trithiocarbonate-controlled radical polymerization. |
