Neopolyol derivatives and refrigerant compositions comprising them
AssigneeEthyl Corporation
InventorMahmood Sabahi
Life of this patent
Estimating the term…
Abstract
Neopolyol derivatives in which at least one of the hydroxyl groups is replaced with a substituent that corresponds to the formula --O--R--C(O)--OR' wherein R is an alkylene group containing 2-5 carbons and R' is a hydrocarbyl or predominantly hydrocarbyl group containing 1-30 carbons are oils which have utility as lubricants. Those in which R' is a hydrocarbyl group of 1-10 carbons are completely miscible with 1,1,1,2 -tetrafluoroethane (R-134a), a refrigerant.
Claims12
A substituted neopolyol which is selected from the group consisting of pentaerythritol, dipentaerythritol, trimethylolethane, and trimethylolpropane and in which at least one of the hydroxyl groups is replaced with a substituent that corresponds to the formula --O--R--C(O)--OR' wherein R is an alkylene group containing 2-5 carbons and R' is an alkyl group containing 1-30 carbons.
A refrigeration composition which comprises 3-20 parts by weight of a halohydrocarbon refrigerant and one part by weight of a substituted neopolyol lubricant in which at least one of the hydroxyl groups is replaced with a substitutent that corresponds to the formula --O--R--C(O)--OR' wherein R is an alkylene group containing 2-5 carbons and R' is a hydrocarbyl or predominantly hydrocarbyl group containing 1-30 carbons.
The refrigeration composition of claim 16 wherein at least substantially all of the hydroxyl groups of the neopolyol are replaced with a substituent that corresponds to the formula --O--(CH.sub.2).sub.n --C(O)--OR' in which n is two or three and R' is an alkyl group of 1-10 carbons.
Dependencies are inferred from the claim text.