Maleimide/ alpha -olefin copolymers and their use as light stabilizers and stabilizers for organic material

• Main Authors: AUMUELLER; ALEXANDER, KRAUSE; ALFRED, HETTCHE; ALBERT, TRAUTH; HUBERT, DENZINGER; WALTER
• Format: Patent
• Language: English
• Published: 20.01.1998
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Maleimide/ alpha -olefin copolymers are composed of structural units I (II) where R1 is a tetramethylpiperidinyl radical of the formula II (II) R3 is hydrogen, C1-C6-alkyl, formyl, C2-C6-alkanoyl, C1-C12-alkoxy, C5- or C6-cycloalkoxy, cyanomethyl, 2-hydroxyethyl, benzyl or a radical of the formula -CR4=CH-CO-OR5, R4 is hydrogen, C1-C6-alkyl or a radical of the formula -CO-OR5, and R5 is C5-C18-alkyl, C5-C8-cycloalkyl, C7-C18-aralkyl, phenyl or tolyl, and up to 8 mol %, based on II, of R1 may furthermore be hydrogen, C1-C22-alkyl or C5-C8-cycloalkyl, and R2 is a mixture of C14-C28-alkyl groups, where two of these alkyl groups, which may differ by no more than two carbon atoms, each account for at least 30% of this mixture, having an average molecular weight of from 1,000 to 50,000. The copolymers described are suitable as light stabilizers and stabilizers for organic material, in particular plastics and coatings. Maleimide/ alpha -olefin copolymers are composed of structural units I (II) where R1 is a tetramethylpiperidinyl radical of the formula II (II) R3 is hydrogen, C1-C6-alkyl, formyl, C2-C6-alkanoyl, C1-C12-alkoxy, C5- or C6-cycloalkoxy, cyanomethyl, 2-hydroxyethyl, benzyl or a radical of the formula -CR4=CH-CO-OR5, R4 is hydrogen, C1-C6-alkyl or a radical of the formula -CO-OR5, and R5 is C5-C18-alkyl, C5-C8-cycloalkyl, C7-C18-aralkyl, phenyl or tolyl, and up to 8 mol %, based on II, of R1 may furthermore be hydrogen, C1-C22-alkyl or C5-C8-cycloalkyl, and R2 is a mixture of C14-C28-alkyl groups, where two of these alkyl groups, which may differ by no more than two carbon atoms, each account for at least 30% of this mixture, having an average molecular weight of from 1,000 to 50,000. The copolymers described are suitable as light stabilizers and stabilizers for organic material, in particular plastics and coatings.