Patent Number: 6,762,226

Title: Compositions stabilized by dioxopiperazinyl derivatives

Abstract: Polyoxymethylene, blends of polycarbonate with acrylonitrile-butadiene-styrene terpolymer, and coatings based on a functional acrylate resin and a crosslinking agent, which are stabilized by addition of a compound of the formula I ##STR1## wherein s is from the range 1 to 8; R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently of each other, are C.sub.1 -C.sub.4 alkyl, or R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4, together with the carbon atom to which they are bound, form a cyclopentyl or cyclohexyl ring; R.sub.5 is hydrogen; C.sub.1 -C.sub.18 alkyl; oxyl; OH; CH.sub.2 CN; C.sub.1 -C.sub.18 alkoxy; C.sub.5 -C.sub.12 cycloalkoxy; C.sub.3 -C.sub.8 alkenyl; C.sub.3 -C.sub.8 alkynyl; C.sub.7 -C.sub.12 phenylalkyl; C.sub.7 -C.sub.15 phenylalkyl, which is substituted on the phenyl ring by 1, 2 or 3 radicals selected from C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy; C.sub.7 -C.sub.15 phenylalkoxy; C.sub.7 -C.sub.15 phenylalkoxy, which is substituted on the phenyl ring by 1, 2 or 3 radicals selected from C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy; or R.sub.5 is C.sub.1 -C.sub.8 alkanoyl; C.sub.3 -C.sub.5 alkenoyl; C.sub.1 -C.sub.18 alkanoyloxy; glycidyl; or a group --CH.sub.2 CH(OH)-G, in which G is hydrogen, methyl or phenyl; and A is as described in claim 1, show a good resistance against harmful effects of light, oxygen and heat.

Inventors: Zedda; Alessandro (Casalecchio di Reno, IT), Zagnoni; Graziano (Vergato, IT), Sala; Massimiliano (Modena, IT), Lazzari; Dario (Casalecchio di Reno, IT), Andrews; Stephen Mark (New Fairfield, CT)

Assignee: Ciba Specialty Chemicals Corporation

International Classification: C08L 69/00 (20060101); C08K 5/3492 (20060101); C08K 5/00 (20060101); C08L 59/00 (20060101); C08L 55/00 (20060101); C08L 55/02 (20060101); C08L 59/02 (20060101); C07D 403/04 (); C07D 403/14 (); C08K 005/346 (); C08K 005/347 (); C08K 005/349 ()

Expiration Date: 07/13/2021