POLYMER COMPOSITION STABILIZED WITH POLYDIALKYLSILOXANE CONTAINING SILOXY UNIT HAVING SOME LIMITED PENDANT STERICALLY HINDERED PHENOL PART

摘要

PURPOSE: To improve the stability against light, heat, a metallic catalyst residue and the like by adding a polydialkylsiloxane contg. a siloxy unit having a defined pendant sterically hindered phenol moiety to an olefin polymer. ;CONSTITUTION: A polydialkylsiloxane contg. a siloxy unit having a pendant sterically hindered phenol moiety represented by formula I (wherein M represented formula II; D represents formula III; D* represents formula IV; R represents phenyl or lower alkyl; R' represents phenyl, phenethyl, or a 1-8C alkyl; R" represents phenyl, a 1-30C alkyl or an alkoxy; t represents a tert. butyl; n is 0 to about 10; m is about 2 to 10; x is 0 to about 250; and y is 2 to about 250) (e.g. formula V) is provided. This compd. is incorporated as a stabilizer into an olefin polymer (e.g. polyethylene), thereby preparing a polymer compsn. which is stable even when a metallic catalyst used in the preparation of the polymer remains in the compsn.;COPYRIGHT: (C)1990,JPO