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Metalworking fluids provide many advantages and benefits to their users. However, they are subject to stringent requirements with regard to their technical characteristics and environmental properties. In order to adjust the performance and ancillary properties of metalworking fluids, the formulator needs high quality additives. Most of these additives are surface/interface active molecules or formulations.
Goldschmidt Chemical Corporation, a wholly owned subsidiary of Degussa Corporation, and its Industrial Specialties business line have a long history in the development and production of surface/interface active products using organic chemistry or organomodified polysiloxanes (OMS). As a result, Goldschmidt has a unique molecular construction set available that enables us to offer additives to meet the specific requirements of the metalworking fluid formulator. Further, our products are developed to ensure ease of formulation while eliminating in-use issues such as metal and process incompatibility.
The following overview provides a summary of the product classes Goldschmidt's Industrial Specialties business line can provide.
GOLDSCHMIDT EMULSIFIERS
For water miscible metalworking fluids it is essential to use good emulsifiers in order to maintain stable dilutions in water. Due to the fact that metalworking fluid emulsions are typically formed without specific mixing equipment, the concentrates must be selfemulsifiable in waten In addition to being self-emulsifiable, good emulsifiers should also be readily soluble in base oils, demonstrate lubricating properties and prevent dermatologicai and toxicological issues.
Although Goldschmidt has a complete line of emulsifiers based on natural raw materials like fatty acid amides, fatty alcohol ethoxylates and vegetable oil-based polyglycolesters, our focus is on specialty emulsifiers based on glycerol fatty acid esters and sorbitan fatty acid esters see Figure 5 (page 25).
In addition to providing excellent emulsifying properties in the base oils typically used in metalworking fluids, emulsifiers based on glycerol fatty acid esters demonstrate excellent toxicological, ecological and dermatologicai properties. Goldschmidt emulsifiers based on glycerol fatty acid esters, such as TAGAT® V 20 have especially...