Method of Lubricating Food Processing Equipment and Related Food Grade, High Temperature Lubricants and Compositions

Abstract

Methods of lubricating food processing equipment that include applying a food grade, high temperature lubricant composition to the food processing equipment are described. The composition includes a polyol polyester base oil that is a reaction product of at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid. Also described are methods of preparing a food grade, high temperature composition comprising reacting at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid. The composition may be a lubricant composition. Additionally, the invention provides a food grade, high temperature lubricant composition comprising a polyol polyester base oil that is a reaction product of at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid.

1 . A method of lubricating food processing equipment comprising applying a food grade, high temperature lubricant composition to the food processing equipment, wherein the composition comprises a polyol polyester base oil that is a reaction product of at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid and the composition is capable of achieving an H1 classification. 
   
   
       2 . The method of  claim 1 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol. 
   
   
       3 . The method of  claim 1 , wherein the at least one monocarboxylic acid contains about 5 to about 12 carbon atoms. 
   
   
       4 . The method of  claim 1 , wherein the polyol polyester base oil is a reaction product of at least one neopentyl polyhydric alcohol and at least two monocarboxylic acids that each has a different structure from the other. 
   
   
       5 . The method of  claim 4 , wherein the first of the at least two monocarboxylic acids is straight chained and the second of the at least two monocarboxylic acids is branched. 
   
   
       6 . The method of  claim 6 , wherein the at least one monocarboxylic acid is chosen from a monocarboxylic acid having about 5 to about 10 carbon atoms and a monocarboxylic acid having about 5 or about 7 carbon atoms. 
   
   
       7 . The method of  claim 6 , wherein the at least one monocarboxylic acid comprises 3,5,5 trimethyl hexanoic acid. 
   
   
       8 . The method of  claim 1 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol, and the at least one monocarboxylic acid is chosen from pentanoic acid, heptanoic acid, 3,5,5-trimethyl hexanoic acid and combinations thereof. 
   
   
       9 . The method of  claim 1 , wherein the composition further comprises one or more of an additive chosen from an antioxidant, an antioxidant system, a metal passivating agent, a rheology modifier, a lubricating property modifier and combinations thereof. 
   
   
       10 . The method of  claim 9 , wherein the antioxidant system is chosen from a system having at least three antioxidants and a system having at least five antioxidants. 
   
   
       11 . The method of  claim 9 , wherein the antioxidant or the antioxidant system is present in an amount of about 1% to about 5% by weight of the total composition. 
   
   
       12 . The method of  claim 9 , wherein the antioxidant system comprises at least three antioxidants chosen from (a) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanediyl ester (CAS number [6683-19-8]); (b) alkylated phenyl alpha naphthylamine or N-phenyl-ar-(1,1,3,3,-tetramethylbutyl)-1-naphthalenamine (CAS number [68259-36-9]); (c) benzenepropanoic acid, 3,5-bis(1,1-dimethyl)-4-hydroxy-,1,6-hexanediyl ester (CAS number [35074-77-2]); (d) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,thiodi-2,1-ethanediyl ester (CAS number [41484-35-9]); (e) a mixture containing 1-hydroxy-4-methyl-2,6-di-tert-butylbenzene; (f) N-phenyl-1-naphthyl amine (CAS number [90-30-2]); (g) a liquid diphenylamine-based antioxidant) and (h) mixed octylated and butylated diphenylamine or benzeneamine,-N-phenyl-, reaction product with 2,4,4-trimethylpentane and 2-methylpropene (CAS number [184378-08-3]); and (i) liquid dl-alpha tocopherol; 2H-1-Benzopyran-6-ol, 3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-(CAS number [10191-41-0]). 
   
   
       13 . The method of  claim 12 , wherein the antioxidant system comprises at least four or at least five antioxidants. 
   
   
       14 . The method of  claim 12 , wherein each of antioxidant (a) to (h), if chosen for use in the system, is present independently in an amount of about 0.1% to about 0.5% by weight of the total composition. 
   
   
       15 . The method of  claim 12 , comprising an additive in an amount of about 1% or less by weight of the total composition, wherein the additive is chosen from a lubricating property modifier and a metal passivating agent. 
   
   
       16 . The method of  claim 9 , wherein the rheology modifier is present in an amount of about 0.2% to about 60% by weight of the total composition. 
   
   
       17 . The method of  claim 1 , wherein the composition has a kinematic viscosity at 40° C. of about 60 to about 400 centistokes and a flash point of at least about 270° C. 
   
   
       18 . The method of  claim 1 , wherein application of the composition to the equipment is accomplished by a process chosen from spraying and dipping. 
   
   
       19 . The method of  claim 1 , wherein application of the composition to the equipment is accomplished by a process chosen from brushing, sponging, wiping, flushing, and irrigating. 
   
   
       20 . A method of preparing a food grade high temperature lubricant comprising reacting at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid, and the lubricant composition is capable of achieving an H1 classification. 
   
   
       21 . The method of  claim 20 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol. 
   
   
       22 . The method of  claim 20 , wherein the at least one monocarboxylic acid contains about 5 to about 12 carbon atoms. 
   
   
       23 . The method of  claim 20 , wherein the polyol polyester base oil is a reaction product of at least one neopentyl polyhydric alcohol and at least two monocarboxylic acids that each has a different structure from the other. 
   
   
       24 . The method of  claim 23 , wherein the first of the at least two monocarboxylic acids is straight chained and the second of the at least two monocarboxylic acids is branched. 
   
   
       25 . The method of  claim 23 , wherein the at least one monocarboxylic acid is chosen from a monocarboxylic acid having about 5 to about 10 carbon atoms and a monocarboxylic acid having about 5 or about 7 carbon atoms. 
   
   
       26 . The method of  claim 20 , wherein the at least one monocarboxylic acid comprises 3,5,5 trimethyl hexanoic acid. 
   
   
       27 . The method of  claim 20 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol, and the at least one monocarboxylic acid is chosen from pentanoic acid, heptanoic acid, 3,5,5-trimethyl hexanoic acid and combinations thereof. 
   
   
       28 . The method of  claim 20 , wherein the composition further comprises one or more of an additive chosen from an antioxidant, an antioxidant system, a rheology modifier, a metal passivating agent, a lubricating property modifier, and combinations thereof. 
   
   
       29 . The method of  claim 28 , wherein the antioxidant system comprises at least three different antioxidants. 
   
   
       30 . The method of  claim 29 , wherein the antioxidant system comprises at least three antioxidants chosen from (a) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanediyl ester (CAS number [6683-19-8]); (b) alkylated phenyl alpha naphthylamine or N-phenyl-ar-(1,1,3,3,-tetramethylbutyl)-1-naphthalenamine (CAS number [68259-36-9]); (c) benzenepropanoic acid, 3,5-bis(1,1-dimethyl)-4-hydroxy-,1,6-hexanediyl ester (CAS number [35074-77-2]); (d) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,thiodi-2,1-ethanediyl ester (CAS number [41484-35-9]); (e) a mixture containing 1-hydroxy-4-methyl-2,6-di-tert-butylbenzene; (f) N-phenyl-1-naphthyl amine (CAS number [90-30-2]); (g) a liquid diphenylamine-based antioxidant) and (h) mixed octylated and butylated diphenylamine or benzeneamine,-N-phenyl-, reaction product with 2,4,4-trimethylpentane and 2-methylpropene (CAS number [184378-08-3]); and (i) liquid dl-alpha tocopherol; 2H-1-Benzopyran-6-ol, 3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-(CAS number [10191-41-0]). 
   
   
       31 . The method of  claim 30 , wherein the antioxidant system comprises at least four or at least five antioxidants. 
   
   
       32 . The method of  claim 30 , wherein each of antioxidant (a) to (h), if chosen for use in the system, is present independently in an amount of about 0.1%to about 0.5% by weight of the total composition. 
   
   
       33 . The method of  claim 28 , wherein the antioxidant or the antioxidant system is present in an amount of about 1% to about 5% by weight of the total composition. 
   
   
       34 . The method of  claim 28 , comprising an additive in an amount of about 1% or less by weight of the total composition, wherein the additive is chosen from a lubricating property modifier and a metal passivating agent. 
   
   
       35 . The method of  claim 28 , wherein the rheology modifier is present in an amount of about 0.2% to about 60% by weight of the total composition. 
   
   
       36 . The method of  claim 20 , wherein the composition has a kinematic viscosity at 40° C. of about 60 to about 400 centistokes and a flash point of at least about 270° C. 
   
   
       37 . A food grade, high temperature lubricant composition comprising a polyol polyester base oil that is a reaction product of at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid. 
   
   
       38 . The composition of  claim 37 , further comprising an antioxidant system comprising at least three antioxidants chosen from (a) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanediyl ester (CAS number [6683-19-8]); (b) alkylated phenyl alpha naphthylamine or N-phenyl-ar-(1,1,3,3,-tetramethylbutyl)-1-naphthalenamine (CAS number [68259-36-9]); (c) benzenepropanoic acid, 3,5-bis(1,1-dimethyl)-4-hydroxy-,1,6-hexanediyl ester (CAS number [35074-77-2]); (d) benzenepropanoic acid, 3,5-bis(l,l-dimethylethyl)-4-hydroxy-,thiodi-2,1-ethanediyl ester (CAS number [41484-35-9]); (e) a mixture containing 1-hydroxy-4-methyl-2,6-di-tert-butylbenzene; (f) N-phenyl-1-naphthyl amine (CAS number [90-30-2]); (g) a liquid diphenylamine-based antioxidant) and (h) mixed octylated and butylated diphenylamine or benzeneamine,-N-phenyl-, reaction product with 2,4,4-trimethylpentane and 2-methylpropene (CAS number [184378-08-3]); and (i) liquid dl-alpha tocopherol; 2H-1-Benzopyran-6-ol, 3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-(CAS number [10191-41-0]). 
   
   
       39 . The method of  claim 38 , wherein the antioxidant system comprises at least four or at least five antioxidants. 
   
   
       40 . The method of  claim 38 , wherein each of antioxidant (a) to (h), if chosen for use in the system, is present independently in an amount of about 0.1% to about 0.5% by weight of the total composition. 
   
   
       41 . The composition of  claim 37 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol. 
   
   
       42 . The composition of  claim 37 , wherein the at least one monocarboxylic acid comprises 3,5,5 trimethyl hexanoic acid. 
   
   
       43 . The composition of  claim 37 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol, and the at least one monocarboxylic acid is chosen from pentanoic acid, heptanoic acid, 3,5,5-trimethyl hexanoic acid and combinations thereof. 
   
   
       44 . The composition of  claim 37 , further comprising one or more of an additive chosen from an antioxidant, an antioxidant system, a rheology modifier, a metal passivating agent, a lubricating property modifier, and combinations thereof. 
   
   
       45 . The composition of  claim 37  having a kinematic viscosity at 40° C. of about 60 to about 400 centistokes and a flash point of at least about 270° C. 
   
   
       46 . A method of lubricating food processing equipment comprising applying a food grade, high temperature lubricant composition to the food processing equipment, wherein the composition comprises a polyol polyester base oil that is a reaction product of at least one neopentyl polyhydric alcohol and at least one monocarboxylic acid. 
   
   
       47 . The method of  claim 46 , wherein the at least one neopentyl polyhydric alcohol comprises dipentaerythritol. 
   
   
       48 . The method of  claim 46 , wherein the composition further comprises one or more of an additive chosen from an antioxidant, an antioxidant system, a metal passivating agent, a rheology modifier, a lubricating property modifier and combinations thereof. 
   
   
       49 . The method of  claim 48 , wherein the antioxidant system comprises at least three antioxidants chosen from (a) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]methyl]-1,3-propanediyl ester (CAS number [6683-19-8]); (b) alkylated phenyl alpha naphthylamine or N-phenyl-ar-(1,1,3,3,-tetramethylbutyl)-1-naphthalenamine (CAS number [68259-36-9]); (c) benzenepropanoic acid, 3,5-bis(1,1-dimethyl)-4-hydroxy-,1,6-hexanediyl ester (CAS number [35074-77-2]); (d) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,thiodi-2,1-ethanediyl ester (CAS number [41484-35-9]); (e) a mixture containing 1-hydroxy-4-methyl-2,6-di-tert-butylbenzene; (f) N-phenyl-1-naphthyl amine (CAS number [90-30-2]); (g) a liquid diphenylamine-based antioxidant) and (h) mixed octylated and butylated diphenylamine or benzeneamine,-N-phenyl-, reaction product with 2,4,4-trimethylpentane and 2-methylpropene (CAS number [184378-08-3]); and (i) liquid dl-alphatocopherol; 2H-1-Benzopyran-6-ol, 3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-(CAS number [10191-41-0]). 
   
   
       50 . The method of  claim 49 , wherein the antioxidant system comprises at least four or at least five antioxidants. 
   
   
       51 . The method of  claim 48 , wherein the antioxidant or the antioxidant system is present in an amount of about 1%to about 5% by weight of the total composition.