| abstract |
PURPOSE: To obtain the titled composition having excellent color tone, transparency and discoloration resistance and suitable for heat-shrinkable label, etc., by compounding a polymer composed of a conjugated diene and a vinyl aromatic hydrocarbon with specific amounts of an inorganic acid and/or organic acid and a phenolic compound. n CONSTITUTION: A polymer having a weight-average molecular weight of 5,000W5,000,000 and produced by polymerizing a conjugated diene and/or a vinyl aromatic hydrocarbon in the presence of an organic lithium compound as an initiator is compounded with (A) 0.05W5 equivalent (based on the above organic lithium compound) of one or more kinds of inorganic acid (e.g. hydrochloric acid) and/or organic acid (e.g. octylic acid) and (B) 0.05W5pts.wt. (based on 100pts.wt. of the polymer) of one or more compounds selected from phenolic compounds expressed by formulas IWIII (R 1 is 1W4C alkyl; R 2 is 2W4C alkenyl; R 3 is tert-butyl, etc.; R 4 is H, etc.). n COPYRIGHT: (C)1988,JPO&Japio |