Stabilized polymer composition

Claim 2

A stabilized synthetic polymer composition comprising (1) 100 parts by weight of a synthetic polymer; (2) 0.001 to 5 parts by weight of a poly(alkylated alkenylphenol) composed substantially of monomeric units represented by the following formula (I) ##STR52## wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R 1 represents an alkyl group having 1 to 18 carbon atoms; and R 2 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms; and (3) 0.001 to 5 parts by weight of an auxiliary stabilizer selected from the group consisting of a polyhydric alcohol ester of an alkylthioalkanoic acid, a polyester of a thiodipropionic acid, and an organic phosphite compound.

Claim 3

The composition of claim 1, wherein the synthetic polymer is a polymer of an ethylenically unsaturated monomer, a saturated or unsaturated polyester, a polyamide, a polycarbonate, a polyacetal, a polyurethane, a phenol resin, a urea resin, a melamine resin, an epoxy resin or a silicone resin.

Claim 4

The composition of claim 1, wherein the auxiliary stabilizer is selected from the group consisting of polyhydric alcohol esters of alkylthioalkanoic acids of the formula (II), polyesters of thiodipropionic acids of the formulae (III) and (IV) and organic phosphite compounds of the formulae (V) and (VI) ##STR53## wherein R 3 represents an alkyl group having 1 to 30 carbon atoms; R 4 represents an alkylene group having 1 to 3 carbon atoms; m represents an integer of 2 to 6; A represents a residue of a polyhydric alcohol having 2 to 6 hydroxyl groups, R 5 represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group, an alkylaryl group, an arylalkyl group or an alkylthioalkyl group; G represents a residue of a dihydric alcohol; n represents 1 to 20; R 6 represents an alkyl group having 1 to 18 carbon atoms, an aryl group, an alkylaryl group, an arylalkyl group, a residue of an ethylene glycol monoether, a residue of a diethylene glycol monoether, a polyhydric phenol residue with at least one unesterified hydroxyl group, a polyhydric phenol residue with at least one unesterified hydroxyl group of which one hydroxyl group is in the form of a phosphite ester, a polyhydric alcohol residue with at least one unesterified hydroxyl group, a polyhydric alcohol residue with at least one unesterified hydroxyl group of which one hydroxyl group is in the form of a phosphite ester, R 7 represents an alkyl group having 1 to 18 carbon atoms, an aryl group, an alkylaryl group, an arylalkyl group, a residue of an ethylene glycol monoether, a residue of a diethylene glycol monoether, a polyhydric phenol residue with at least one unesterified hydroxyl group, or a polyhydric alcohol residue with at least one unesterified hydroxyl group; R 8 represents the groups as defined above for R 7 and additionally a hydrogen atom; R 9 represents a hydrogen atom or a ##STR54## group; B represents a residue of a polyhydric alcohol having 2 to 6 hydroxyl groups or a residue of a polyhydric phenol having 2 to 6 hydroxyl groups; l represents 0 or 1; p represents 1 to 10; and q represents 0 to 4.

Claim 5

The composition of claim 2, wherein the polymer of an ethylenically unsaturated monomer is polyethylene, polypropylene, polybutene, an acrylonitrile/butadiene/styrene resin, polyvinyl chloride, isoprene rubber, butadiene rubber, butadiene copolymer or an ethylene/vinyl acetate copolymer.

Claim 6

The composition of claim 2, wherein the polyester is polybutylene terephthalate.

Claim 7

The composition of claim 1, wherein the poly(alkylated alkenylphenol) is poly(tertiary-butylated p-vinylphenol).

Claim 8

The composition of claim 1, wherein the poly(alkylated alkenylphenol) is poly(tertiary butylated p-isopropenylphenol).

Claim 9

The composition of claim 1, wherein the poly(alkylated alkenylphenol) is poly(propylated p-vinylphenol).

Claim 10

The composition of claim 1, wherein the poly(alkylated alkenylphenol) is poly(tertiary butylated 2-methyl-p-vinylphenol).

Claim 11

The composition of claim 3, wherein the polyhydric alcohol ester of an alkylthioalkanoic acid is a compound of the formula: ##STR55##

Claim 12

The composition of claim 3, wherein the polyhydric alcohol ester of an alkylthioalkanoic acid is a compound of the formula: ##STR56##

Claim 13

The composition of claim 3, wherein the polyester of a thiodipropionic acid is a compound of the following formula: ##STR57##

Claim 14

The composition of claim 3, wherein the polyester of a thiodipropionic acid is a compound of the following formula: ##STR58##

Claim 15

The composition of claim 3, wherein the polyester of a thiodipropionic acid is a compound of the following formula: ##STR59##

Claim 16

The composition of claim 3, wherein the organic phosphite compound is a compound of the following formula: ##STR60##

Claim 17

The composition of claim 3, wherein the organic phosphite compound is a compound of the following formula: ##STR61##

Claim 18

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR62##

Claim 19

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR63##

Claim 20

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR64##

Claim 21

The composition of claim 3, wherein the polyhydric alcohol ester of an alkylthioalkanoic acid is a compound of the formula: (C.sub.12 H.sub.25 SCH.sub.2 COOCH.sub.2).sub.4 C

Claim 22

The composition of claim 3, wherein the polyhydric alcohol ester of an alkylthioalkanoic acid is a compound of the formula: ##STR65##

Claim 23

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR66##

Claim 24

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR67##

Claim 25

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR68##

Claim 26

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR69##

Claim 27

The composition of claim 3, wherein the organic phosphite compound is a compound of the formula: ##STR70##