3
in which
R , R , R , R , independently of each other, represent a C -C -1 2 3 4 1 8
alkyl, C -C -cycloalkyl, C -C -aryl or C -C -aralkyl group,5 6 6 10 7 12
n may be 0 or 1, irrespective of the position,
N is an average number from 0.5 to 5 and
X represents a mono or polynuclear aromatic group with 6 to
30 carbon atoms,
or 0.1 to 20 parts by weight of a mixture of an oligomeric phosphorus compound of the formula
(Ia) and a phosphorus compound of the formula (Ib)
R R5 is methyl and
m is a number of 0 to 5,
where the amount of phosphorus compound of the formula (Ib) in the mixture of phosphorus
compounds is 1 to 50% by weight, relative to 100% by weight of phosphorus compound of the
formulae (Ia) and (Ib);
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Last modified: November 3, 2007