Stabilizer for high polymers

Details Stabilizer for high polymers Stabilizer for high polymers

C - Chemistry, Metallurgy

09

K

31/75

C09K 15/14 (2006.01) C08K 5/134 (2006.01) C08K 5/372 (2006.01) C08K 5/378 (2006.01)

Patent

CA 1245047

ABSTRACT A heat-, light- and oxidation stabilizer for high polymers, e.g. polyolefins, styrene resins, and engineering plastics, comprising a mixture of a phenolic type compound represented by the formula (I), Image (I) wherein R1 represents a C1-C9 alkyl group, R2 represents a C1-C3 alkyl group, R3 represents a hydrogen atom or a methyl group, x represents an integer of 2 to 6, y represents an integer of 1 to 10, and A represents a di- to hexahydric carboxylic acid residue, but it may be simply a single bond when x is 2, and (II) a sulfur-containing compound of the formula (II-1), Image (II-1) wherein R4 represents a C4-C20 alkyl group, or of the formula (II-2), Image (II-2) wherein R5 represents a C3-C18 alkyl group, and R6 and R7 independently represent a hydrogen atom or a C1-C6 alkyl group. The weight ratio of the phenolic type compound (I) to the sulfur-containing compound (II) is 1 to 0.5-15.

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