Preparation of meadowfoam dimer acids and dimer esters, and their use as lubricants

Journal of the American Oil Chemists' Society - Tập 68 Số 8 - Trang 600-603 - 1991
D. A. Burg1,2, R. Kleiman1
1Agricultural Research Service, National Center for Agricultural Utilization Research USDA 1815 North University Street Peoria IL 61604
2LONZA, Inc. P.O. Box 993 79 Route 22 East Annandale NJ 08801

Tóm tắt

AbstractMeadowfoam dimer acids have been prepared in a thermal clay‐catalyzed reaction. Reaction conditions have been optimized, and yields of 44% were obtained with 2% water and 6–8% of an acid‐washed montmorillonite clay, based on the meadowfoam fatty acids. Purity of the distilled dimer acids was 79–89% with most of the remaining 11–22% being residual mono‐ and tribasic acids. Dimethyl, di‐(2‐ethylhexyl), and di‐n‐butyl meadowfoam dimer ester derivatives were also prepared. Color, viscosity, and wear‐preventive characteristics of the meadowfoam dimer acids and dimer ester derivatives were compared to those of commercial dimer acids and dimer esters. The viscosity of the meadowfoam dimer acids is similar to that of Empol® 1010, which is also derived from a highly monounsaturated fatty acid source. Viscosities of the meadowfoam dimer esters were also comparable to those of commercial dimer esters. Wear prevention characteristics, as determined by the four‐ball test method, of the meadowfoam dimer acids and dimer esters were similar to those of the commercial products. In one case, the di‐n‐butyl esters, the meadowfoam derivative showed a significantly smaller wear scar than that shown by the di‐n‐butyl derivative of Unidyme® 14.

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Tài liệu tham khảo

Nikko Chemicals K.K. Japanese patent 58144311 (1983).

Tanaka K. andK.Nomoto Japanese patent 62153208 (1987).

10.1007/BF02657767

Erhan S.M., 1990, Ibid., 67, 607

Erhan S.M., 1990, Rubber World, 203, 33

Leonard E.C., 1975, The Dimer Acids

Chemical Marketing Reporter May 15 1989 p.46.

10.1007/BF02909080

Veazey R.L., 1986, Ibid., 63, 1043

Barnhorst J.A. K.D.GatesandE.H.Fairchild A Comparison of Detection Methods for High Pressure Liquid Chromatography of Dimer Acids (paper E2) presented at the Annual American Oil Chemists' Society Meeting Cincinnati OH May1989.

10.1007/BF02641192

McMahon D.H., 1974, Ibid., 51, 522

Parker W.E., 1965, Ibid., 42, 792

Tierney R.B. U.S. patent 2922763 (1960).

Tierney R.B. R.H.KrugandR.P.Chesluk U.S. patent 2930758 (1960).

Tierney R.B. andR.P.Chesluk Canadian patent 665302 (1963).

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Thông tin xuất bản

Journal of the American Oil Chemists' Society

Tập 68 Số 8

600-603

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