Maleimide/.alpha.-olefin copolymers and their use as light stabi

Details Maleimide/.alpha.-olefin copolymers and their use as light stabi Maleimide/.alpha.-olefin copolymers and their use as light stabi

1996-05-10

1998-01-20

Schofen, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526348, 526 89, C08F22240, C08F21000, C08F 206

Patent

active

057102287

ABSTRACT:
Maleimide/.alpha.-olefin copolymers are composed of structural units I ##STR1## where R.sup.1 is a tetramethylpiperidinyl radical of the formula II ##STR2## R.sup.3 is hydrogen, C.sub.1 -C.sub.6 -alkyl, formyl, C.sub.2 -C.sub.6 -alkanoyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.5 - or C.sub.6 -cycloalkoxy, cyanomethyl, 2-hydroxyethyl, benzyl or a radical of the formula --CR.sup.4 =CH--CO--OR.sup.5, R.sup.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl or a radical of the formula --CO--OR.sup.5, and
R.sup.5 is C.sub.5 -C.sub.18 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.7 -C.sub.18 -aralkyl, phenyl or tolyl, and
up to 8 mol %, based on II, of R.sup.1 may furthermore be hydrogen, C.sub.1 -C.sub.22 -alkyl or C.sub.5 -C.sub.8 -cycloalkyl, and R.sup.2 is a mixture of C.sub.14 -C.sub.28 -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.

REFERENCES:
patent: 4520171 (1985-05-01), Diveley et al.

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