Lubricant Composition Comprising an Antioxidant Composition

Patent metadata

Field	Value
Publication number	US-2021189280-A1
Application number	US-202017128693-A
Country	US
Kind code	A1
Filing date	Dec 21, 2020
Priority date	Dec 20, 2019
Publication date	Jun 24, 2021
Grant date	—

Abstract

A lubricant composition is disclosed comprising an antioxidant composition and a lubricating oil. The antioxidant composition comprises a phenolic antioxidant having the following structure (I)

and

a phosphite antioxidant having the following structure (II)

wherein,
A is a direct bond or an alkylene; X is —C(O)O—, —OC(O)—, —C(O)N(R 7 )—, —N(R 7 )C(O)—, —C(O)—, —N(R 7 )—, —O—, or —S—; R 1 and R 2 are each independently a C 1 -C 10 alkyl, a C 2 -C 10 alkenyl, a C 2 -C 10 alkynyl, or a C 3 -C 12 aryl; R 3 includes a C 1 -C 80 alkyl, a C 2 -C 80 alkenyl, a C 2 -C 80 alkynyl, or a C 3 -C 12 aryl; R 4 , R 5 , and R 6 are each independently hydrogen, alkyl, alkenyl, alkynyl, or aryl provided that at least one of R 4 , R 5 , and R 6 is not hydrogen; R 7 is H or an alkyl; and m, n, and o are each independently from 1 to 3.

First claim

1 - 37 . (canceled)

38 . A lubricant composition comprising:
an antioxidant composition comprising a phenolic antioxidant having the following structure (I)

and
a phosphite antioxidant having the following structure (II)

wherein,
A is a direct bond or an alkylene;
X is —C(O)O—, —OC(O)—, —C(O)N(R 7 )—, —N(R 7 )C(O)—, —C(O)—, —N(R 7 )—, —O—, or —S—;
R 1 and R 2 are each independently a C 1 -C 10 alkyl, a C 2 -C 10 alkenyl, a C 2 -C 10 alkynyl, or a C 3 -C 12 aryl;
R 3 includes a C 1 -C 80 alkyl, a C 2 -C 80 alkenyl, a C 2 -C 80 alkynyl, or a C 3 -C 12 aryl;
R 4 , R 5 , and R 6 are each independently hydrogen, alkyl, alkenyl, alkynyl, or aryl provided that at least one of R 4 , R 5 , and R 6 is not hydrogen;
R 7 is H or an alkyl; and
m, n, and o are each independently from 1 to 3; and

a lubricating oil.

39 . The lubricant composition of claim 38 , wherein the weight ratio of the phenolic antioxidant to the phosphite antioxidant is from 0.1 to 10.

40 . The lubricant composition of claim 38 , wherein the phenolic antioxidant is present in the lubricant composition in an amount of from 0.01% by weight to 5% by weight.

41 . The lubricant composition of claim 38 , wherein the phosphite antioxidant is present in the lubricant composition in an amount of from 0.01% by weight to 5% by weight.

42 . The lubricant composition of claim 38 , wherein the lubricant composition exhibits a standard RPVOT oxidation induction time of 150 minutes or more as determined according to ASTM D2272-14a and at a temperature of 150° C.

43 . The lubricant composition of claim 38 , wherein the lubricant composition exhibits a standard RPVOT oxidation induction time as determined according to ASTM D2272-14a at a temperature of 150° C. of at least 20% greater than an expected standard RPVOT oxidation induction time.

44 . The lubricant composition of claim 38 , wherein the lubricant composition exhibits a dry RPVOT oxidation induction time of 200 minutes or more as determined according to a modified ASTM D2272-14a and at a temperature of 150° C.

45 . The lubricant composition of claim 38 , wherein the lubricant composition exhibits a dry RPVOT oxidation induction time as determined according to a modified ASTM D2272-14a at a temperature of 150° C. of at least 20% greater than an expected dry RPVOT oxidation induction time.

46 . The lubricant composition of claim 38 , wherein the lubricant composition exhibits a PDSC oxidation induction time of 20 minutes or more as determined at a temperature of 160° C.

47 . The lubricant composition of claim 38 , wherein the lubricant composition exhibits a TEOST 33C deposit of 50 mg or less as determined according to ASTM D6335-16 and a temperature change on a depositor rod from 200° C. to 480° C.

48 . The lubricant composition of claim 38 , wherein R 1 and R 2 are each a C 1 -C 5 alkyl.

49 . The lubricant composition of claim 38 , wherein A is a C 1 -C 8 alkylene.

50 . The lubricant composition of claim 38 , wherein X is —C(O)O—.

51 . The lubricant composition of claim 38 , wherein R 3 includes a C 10 -C 80 alkyl.

52 . The lubricant composition of claim 38 , wherein R 3 includes a C 10 -C 20 alkyl.

53 . The lubricant composition of claim 38 , wherein R 4 , R 5 , and R 6 are each alkyl.

54 . The lubricant composition of claim 38 , wherein R 4 , R 5 , and R 6 are each independently a C 1 -C 10 alkyl.

55 . The lubricant composition of claim 38 , wherein m, n, and o are 1 or m, n, and o are 2.

56 . The lubricant composition of claim 38 , wherein two of m, n, and o are 1 and one of m, n, and o is 2 or one of m, n, and o is 1 and two of m, n, and o are 2

57 . The lubricant composition of claim 38 , wherein the lubricant composition further comprises an alkanolamine.

58 . The lubricant composition of claim 38 , wherein the lubricant composition further comprises a triisopropanolamine n an amount of about 5 wt. % or less.

Assignees

• Si Group Inc

Inventors

• Tang Tom

Classifications

• C10M2223/049

  Phosphite · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10M2207/289

  containing free hydroxy groups · CPC title

• C10N2030/10

  Inhibition of oxidation, e.g. anti-oxidants · CPC title

• C10M141/10 Primary

  at least one of them being an organic phosphorus-containing compound · CPC title