Table A2 U.V. Absorbers and Stabilizers

Used as a u.v. stabilizer in such polymers as polyethylene, polypropylene, ABS, and Nylon-66 

R1 is a Cx 18 alkyl or haloalkyl group R2 is a uni-, -, or ter-valent saturated aliphatic hydrocarbon radical which may be halogen-substituted, or a uni-, -, or ter-valent metal, e.g. an alkali metal, an alkaline-earth metal, Zn, Cd, Sn, Al, or Ni n is an integer from 1 to 3 corresponding to the valency of R2, and X is H, Br, or a group of the formula — CH2P(0)(ORl)a where R1 is as mentioned above 

Ra is a t-butyl group, R1 is a Ci alkyl group provided that one or more is a methyl group x is 1 or 2 

Used especially in the stabilization of ethylene and propylene polymers 

R1 and R2 are the same or different and each is a C 12 alkyl residue, or R1 and R2 together with the carbon atom to which they are bound form a C6 la cycloalkyl residue. Y is , H, a straight or branched Q-go alkyl residue, Cj 12 

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Table A2 U. V. absorbers and stabilizers Class and general formula Organometallics... 

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