| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multilayer polymer having both superior stress whitening resistance and elongation property (tensile strength) in being contained in a film. <P>SOLUTION: In the multilayer polymer of such a three-layer structure that an elastic polymer layer (B) is disposed on the outer side of an elastic polymer layer (A) and a hard graft layer (C) is disposed on the outer side of the elastic polymer layer (B), the elastic polymer layer (A) is made by polymerizing monomer component (a) which contains alkylacrylate in the range of 50 wt.% to 99.9 wt.% and multi-functional monomer having two or more double bonds radically polymerizable in the range of 0.1 wt.% or more and less than 1 wt.%, the elastic polymer layer (B) is made by polymerizing monomer component (b) which contains alkylacrylate in the range of 50 wt.% to 99 wt.% and multi-functional monomer having two or more double bonds radically polymerizable in the range of 1 wt.% to 10 wt.%, and the hard graft layer (C) is made by polymerizing monomer component (c) primarily comprising alkylmethacrylate. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
