Synergistic ultraviolet absorber compositions containing hydroxy aryl triazines and tetraalkyl piperidines

Claim 2

The composition of Claim 1 wherein said piperidine compound (B) is represented by the formula: Wherein R''' is a saturated or unsaturated, optionally alkyl- or alkenyl-substituted alkylene or cycloalkylene radical having 2 to 20 C-atoms and R' is selected from a group consisting of: -CH₂-CH₂-CN; -CH₂-CH₂-COO-alkyl; -CH₂-CH(CH₃)-COO-alkyl; an acyl radical; and -(CH₂-CH₂O) n H, wherein n is 1 to 10.

Claim 3

The composition of Claim 2 wherein R''' is (a) a group represented by the formula wherein R'' is C₁₂ to C₁₈ alkyl groups; (b) a cycloalkylene group; (c) 1,2-cyclohexanediyl or methyl-substituted 1,2-cyclohexanediyl radical; or (d) a bicyclic divalent aliphatic radical.

Claim 4

The composition of Claim 2 wherein R' of said piperidine is methyl or acetyl.

Claim 5

The composition of Claim 1 wherein the triazine (A) is represented by Formula I-A: wherein R is a linear, branched aliphatic, or cycloaliphatic alkyl moiety of 1 to 12 carbon atoms: (1) interrupted by one or more oxygen atoms; or (2) substituted by one or more hydroxy group or alkoxy groups of 1 to 12 carbon atoms; or (3) both interrupted and substituted by the above groups of (1) and (2).

Claim 6

The composition of claim 5 having a triazine wherein R is a 2-hydroxyethyl, 3-(2-ethylhexyl-1-oxy)-2-hydroxypropyl, 6-hydroxyhexyl, or 2-hexyloxyethoxyethyl groups which triazines are represented, respectively, by Formulae I-C, I-G, I-E, and I-H:

Claim 7

The composition of claim 6 having a triazine wherein R is 6-hydroxyhexyl group and the triazine is represented by Formula I-E: and optionally containing higher oligomers represented by Formula I-F: wherein n is an integer between 1 and 12.

Claim 8

An improved method of stabilizing a polymer by adding into said polymer a UVA and a HALS wherein the improvement comprises: Incorporating into said polymer a stabilizingly and synergistically effective amount of: (A) a hydroxy group-containing aryl triazine ultraviolet absorber represented by Formula I: wherein X,Y,Z are each the same or different aromatic carbocyclic radicals, and at least one of the X, Y, and Z has a hydroxy group substituted ortho to the point of attachment to the triazine ring, and an OR group substituted at a point para to the attachment of the triazine ring, and, wherein the R moiety of the OR group is, independently, a linear, branched aliphatic or cycloaliphatic alkyl moiety containing 1 to 12 carbon atoms and is: (1) interrupted by one or more oxygen atoms; or (2) substituted by one or more hydroxy groups or alkoxy groups of 1 to 12 carbon atoms; or (3) both interrupted and substituted by the above groups of (1) or (2); and wherein R¹ to R⁹ is selected from the group consisting of hydrogen, hydroxy, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, sulfonic, halo, carboxy, haloalkyl, and acrylamino; and (B) a 2,2,6,6-tetraalkylpiperidine compound, or the acid addition salts or complexes with metal compounds thereof.

Claim 9

The method of Claim 8 wherein said hydroxy group-containing triazine (A) is represented by Formula I-A: wherein R is a linear, branched, aliphatic or cycloaliphatic alkyl moiety of 1 to 12 carbon atoms, and is: (1) interrupted by one or more gxygen atoms; or (2) substituted by one or more hydroxy groups or alkoxy groups of 1 to 12 carbon atoms; or (3) both interrupted and substituted by the above groups of (1) and (2).

Claim 10

The method of Claim 9 wherein R group in said hydroxy group-containing triazine is a 2-hydroxyethyl, 3-(2-ethylhexyl-1-oxy)-2-hydroxypropyl, 6-hydroxyhexyl, or 2-hexyloxyethoxyethyl groups which triazines are represented, repectively, by Formulae I-C, I-G, I-E, and I-H: