公开(公告)号：GB717437A

公开(公告)日：1954-10-27

申请号：GB799252

申请日：1952-03-28

Applicant: STANDARD OIL DEV CO

Inventor： BLOWERS FREDERICK FRANK ,  HODGE HAROLD PERCY

IPC: C10M169/00

Abstract: A lubricating composition, suitable for use on the external controls of aircraft, comprises a major proportion of mineral lubricating oil and minor proportions each of an oil-soluble viscosity index improver (which is a polymeric material having a molecular weight in the range 8,000 to 25,000 Standinger, particularly polyisobutylene or depolymerized synthetic rubber), an oil-soluble tackiness agent (which is a polymeric material having a molecular weight in the range 40,000 to 120,000 Standinger, particularly polyisobutylene or depolymerized synthetic rubber) and an oil-soluble synthetic lubricating oil containing an esterified carboxyl group in the molecule. The synthetic lubricating oil is preferably a simple ester, diester, partial ester or complex ester formed from one or more C10-C18 organic mono- or poly-carboxylic acids and one or more C3-C9 mono- or polyhydric alcohols. Thus, the ester may be formed from two mols. of a monohydric alcohol and one mol. of a dicarboxylic acid, for example dinonyl sebacate. Alternatively, it may be formed from equimolecular proportions of a monohydric alcohol and a monocarboxylic acid, for example isopropyl oleate. In an example, a lubricating composition is prepared from mineral lubricating oil, a concentrate of polyisobutylene (M.W. about 10,000) in mineral oil, a concentrate of polyisobutylene (M.W. about 100,000) in mineral oil, and dinonyl sebacate. For comparison purposes, a similar composition is described from which the dinonyl sebacate is omitted.ALSO:A lubricating composition, suitable for use on the external controls of aircraft, comprises a major proportion of mineral lubricating oil and minor proportions each of an oil-soluble viscosity index improver (which is a polymeric material having a molecular weight in the range 8,000 to 25,000 Staudinger, particularly polyisobutylene or depolymerized synthetic rubber), an oil-soluble tackiness agent (which is a polymeric material having a molecular weight in the range 40,000 to 120,000 Staudinger, particularly polyisobutylene or depolymerized synthetic rubber) and an oil-soluble synthetic lubricating oil containing an esterified carboxyl group in the molecule. The synthetic lubricating oil is preferably a simple ester, diester, partial ester or complex ester formed from one or more C10-C18 organic mono- or poly-carboxylic acids and one or more C3-C9 mono- or poly-hydric alcohols. Thus, the ester may be formed from two mols of a monohydric alcohol and one mol of a dicarboxylic acid, for example dinonyl sebacate. Alternatively, it may be formed from equimolecular proportions of a monohydric alcohol and a mono-carboxylic acid, for example isopropyl oleate. In an example, a lubricating composition is prepared from mineral lubricating oil, a concentrate of polyisobutylene (M.W. about 10,000) in mineral oil, a concentrate of polyisobutylene (M.W. about 100,000) in mineral oil, and dinonyl sebacate. For comparison purposes, a similar composition is described from which the dinonyl sebacate is omitted.