Polyol ester compositions with unconverted hydroxyl groups

Details Polyol ester compositions with unconverted hydroxyl groups Polyol ester compositions with unconverted hydroxyl groups

C - Chemistry, Metallurgy

10

M

C10M 105/40 (2006.01) C10M 105/42 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2214350

A synthetic ester composition which exhibits thermal and oxidative stability, lower friction coefficient and lower wear, wherein the ester composition comprises the reaction product of a branched or linear alcohol having the general formula R(OH)n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and at least one branched mono-carboxylic acid which has a carbon number in the range between about C5 to C13; wherein the synthetic ester composition has between about 5- 35 % unconverted hydroxyl groups, based on the total amount of hydroxyl groups in the branched or linear alcohol.

Cette invention concerne une composition d'ester synthétique possédant des qualités de stabilité thermique et de stabilité à l'oxydation, un faible coefficient de frottement et une faible usure. Cette composition d'ester comprend le produit de réaction, d'une part, d'un alcool linéaire ou ramifié de formule générale R(OH)¿n? où R est un groupe aliphatique ou cyclo-aliphatique possédant environ de 2 à 20 atomes de carbone et n est au moins égal à 2, et, d'autre part, d'au moins un acide monocarboxylique ramifié dont le nombre d'atomes de carbone se situe dans une plage allant de C¿5? à C¿13?. La composition d'ester synthétique contient environ 5 % à 35 % de groupes hydroxyle non convertis en fonction de la quantité totale de groupes hydroxyle dans l'alcool linéaire ou ramifié.

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