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Title:
BIODEGRADABLE FUNCTIONAL LIQUID FOR MECHANIC DRIVES
Document Type and Number:
WIPO Patent Application WO2002024841
Kind Code:
A3
Abstract:
The invention relates to a water-based biodegradable functional liquid for mechanical drives, preferably for use in steam engines. The aim of the invention is to create functional liquids for use in mechanical drives, particularly for hydrodynamically lubricating plain bearings, preferably for crankshafts of superheated steam engines having customary non-overly precise bearing play. The inventive liquids should be able to be used in closed power pack systems also in the existence of sump temperatures exceeding 120 DEG C, e.g. in the lubricant pan located under a crank drive and be water-based or able to be diluted with water. According to the invention, this is achieved by a percentually low addition of polyaspartic acid to water or to water-glycol mixtures, whereby polyaspartic acid having a molar mass ranging from 1,000 to 10,000 g/mol is preferably used.

Inventors:
WOYDT MATHIAS (DE)
HOETGER MICHAEL (DE)
KLEEMANN JENS (DE)
Application Number:
PCT/DE2001/003672
Publication Date:
February 13, 2003
Filing Date:
September 20, 2001
Export Citation:
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Assignee:
TEA GMBH (DE)
WOYDT MATHIAS (DE)
HOETGER MICHAEL (DE)
KLEEMANN JENS (DE)
International Classes:
C10M169/04; C10M173/02; (IPC1-7): C10M169/04; C10M173/02; C10N30/04; C10N30/12
Domestic Patent References:
WO1997004052A11997-02-06
WO1995016767A11995-06-22
Foreign References:
US5616544A1997-04-01
US5401428A1995-03-28
DE4311237A11994-10-13
US5942150A1999-08-24
US3992312A1976-11-16
US4855070A1989-08-08
EP0464491A11992-01-08
Other References:
DATABASE WPI Derwent World Patents Index; AN 1977-52827y, XP002201112
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