C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 173/02 (2006.01) C10M 149/18 (2006.01)
Patent
CA 2227330
There are disclosed improved water-soluble metal working fluids comprising polyaspartic acid, amides and salts thereof, a corrosion inhibitor(s) and a basic additive said additive having sufficient basicity and buffering power to maintain the pH of the composition above about 8.5 and preferably above about 9. Such compositions are useful as lubricants in processes to cut, bend, grind and shape both ferrous and non-ferrous metals and tend to maintain higher pH values due to the incorporation of a basic additive. The polyaspartic acid and salts thereof are particularly advantageous in that the fluids can be easily disposed of after use without special treatment because polyaspartic acid and salts thereof are readily biodegradable.
L'invention concerne des fluides hydro-solubles améliorés de transformation des métaux comprenant de l'acide polyaspartique, ses amides et ses sels, un ou des inhibiteurs de corrosion et un additif basique ayant une basicité suffisante et un pouvor tampon suffisant pour maintenir le pH de la composition au-dessus d'environ 8,5 et, de préférence, au-dessus d'environ 9. Ces compositions sont d'utiles lubrifiants dans les opérations de coupe, de pliage, de meulage, et de formage des métaux à la fois ferreux et non ferreux et elles tendent à maintenir des valeurs de pH plus élevées grâce à l'adjonction d'un additif basique. L'acide polyaspartique et ses sels sont particulièrement avantageux en ce sens que les fluides peuvent facilement être jetés après utilisation sans traitement spécial, étant donné que l'acide polyaspartique et ses sels sont facilement biodégradables.
Kalota Dennis J.
Martin David A.
Silverman David C.
Mcfadden Fincham
Monsanto Company
Solutia Inc.
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