Thermal stabilizer composition and synthetic resin composition comprising same

Patent metadata

Field	Value
Publication number	US-10654990-B2
Application number	US-201515506384-A
Country	US
Kind code	B2
Filing date	Aug 4, 2015
Priority date	Aug 27, 2014
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

Provided are: a thermal stabilizer composition which does not generate an odor of a phosphorus-based antioxidant; and a synthetic resin composition comprising the same. The thermal stabilizer composition comprises: 100 parts by mass of a phosphorus-based antioxidant having a phosphite structure; and 0.001 to 10 parts by mass of a phenolic antioxidant having a substructure represented by the following Formula (1):

(wherein, R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; a represents an integer of 0 to 2; and, when a is 2, plural R 3 s are optionally the same or different).

First claim

The invention claimed is:

1. A thermal stabilizer composition, consisting of comprising:
100 parts by mass of a phosphorus-based antioxidant having a phosphite structure;
0.01 to 5 parts by mass of a phenolic antioxidant; and
optionally, one or more resin additives,
wherein said phenolic antioxidant has a substructure represented by the following Formula (2″):

wherein, n represents an integer of 1 to 4;
when n is 1, X represents an alkyl group having 1 to 40 carbon atoms, an alkoxy group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms or a combination thereof;
when n is 2, X represents an alkylidene group having 1 to 40 carbon atoms, an arylene group having 6 to 40 carbon atoms or a group represented by the following Formula (3):

wherein, R 6 and R 7 each independently represent an alkylidene group having 1 to 40 carbon atoms or an arylene group having 6 to 40 carbon atoms;
when n is 3, X represents an alkanetriyl group having 1 to 40 carbon atoms or a trivalent cyclic group having 6 to 40 carbon atoms,
when n is 4, X represents an alkanetetrayl group having 1 to 40 carbon atoms; and
wherein a methylene group in said alkyl group, alkoxy group, arylalkyl group, alkylidene group, alkanetriyl group and alkanetetrayl group is optionally substituted with >C═O, —O—, —S—, —CO—O—, —O—CO—, —O—CO—O—, —NR 5 —, a phosphine, a phosphinite, a phosphonite, a phosphite, a phosphorane, a phosphonate or a combination thereof and optionally branched, and R 5 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
wherein, in formula 2″, X forms a carbon-carbon bond with the phenyl group, and
wherein said phenolic antioxidant has a molecular weight in a range of 300 to 2,000,
wherein said phosphorus-based antioxidant is represented by Formula (4):

wherein, R 8 and R 9 each independently represent an alkyl group having 1 to 40 carbon atoms, R 10 represents a direct bond, b is 1, and T represents an alkyl group having 1 to 40 carbon atoms; and
wherein the one or more resin additives are selected from the group consisting of thioether-based antioxidant, an ultraviolet absorber, a hindered amine-based light stabilizer, a nucleating agent, a flame retardant, a flame retardant aid, a lubricant, a filler, a metallic soap, a hydrotalcite, an antistatic agent, a pigment, a dye, and a combination thereof.

2. The thermal stabilizer composition according to claim 1 , wherein said phosphorus-based antioxidant having a phosphite structure has a melting point of 100° C. or lower.

3. A synthetic resin composition comprising 0.001 to 10 parts by mass of the thermal stabilizer composition according to claim 1 with respect to 100 parts by mass of a synthetic resin.

4. The thermal stabilizer composition according to claim 1 , wherein n in Formula (2″) is an integer of 2 or 3.

5. The thermal stabilizer composition according to claim 1 , wherein said phenolic antioxidant comprises 1,1,3-tris(2-methyl-5-tert-butyl-4-hydroxyphenyl)butane.

6. The thermal stabilizer composition according to claim 1 , wherein said phenolic antioxidant comprises 4,4′-butylidene-bis(3-methyl-6-tert-butylphenol).

Assignees

• Adeka Corp

Inventors

• Negishi Yoshinori
• Honma Yasuhiro
• Segawa Masaki
• Ishizuka Yuto
• Ishii Mariko

Classifications

• C08K5/527

  Cyclic esters · CPC title

• C08K5/524 Primary

  Esters of phosphorous acids, e.g. of H3PO3 · CPC title

• C09K15/08

  containing a phenol or quinone moiety · CPC title

• C08K5/134

  Phenols containing ester groups · CPC title

• C09K15/322 Primary

  containing only phosphorus · CPC title