Chlorinated paraffins have been the dominant extreme pressure additive in metalworking fluids for decades — delivering high weld points and reliable AW performance in metal drawing, forming, and cutting operations. But regulatory pressure is accelerating their phase-out, and formulators need proven replacements that don’t sacrifice performance.
Why Chlorinated Paraffins Are Being Phased Out
- REACH regulation (EU): Short-chain chlorinated paraffins (SCCPs) are on the SVHC candidate list; medium-chain (MCCPs) are under increasing restriction
- US EPA: Enhanced reporting requirements under TSCA for chlorinated compounds
- Customer pressure: OEMs and tier-1 manufacturers requiring chlorine-free metalworking fluids in supply chain specifications
- Disposal costs: Chlorinated sludge from machining operations requires costly hazardous waste disposal
Performance Requirements for a Replacement
A viable chlorinated paraffin replacement in metalworking fluids must deliver:
- High EP weld point (≥ 800 kgf on 4-Ball EP test)
- Low wear scar diameter under standard AW test conditions
- Compatibility with mineral oil and synthetic base fluids
- Stability in water-dilutable (emulsifiable) and straight oil formulations
- Non-chlorinated chemistry for regulatory compliance
Desilube Solutions for Metalworking
Desilube offers two complementary approaches depending on the application:
Desilube 77 — Amine Phosphate for Heavy-Duty Operations
Desilube 77 is an oil-soluble amine phosphate EP/AW additive with a 4-Ball weld point exceeding 800 kgf — matching or exceeding the performance of chlorinated paraffin packages. It is soluble in Group I–IV base oils and compatible with most emulsifier systems for water-dilutable metalworking fluids. Recommended for: deep drawing, wire drawing, tube drawing, and heavy forming operations where chlorinated paraffins have traditionally been required. Dosage: 2–15%.
Desilube 88 and 98F — NSF HX1 for Food-Equipment Machining
For metalworking operations on components destined for food processing equipment, Desilube 88 and 98F provide NSF HX1-certified EP/AW performance. Both grades are compatible with mineral oils and synthetic base fluids and are synergistic with MoS₂ additions where additional friction reduction is needed.
Treat Rate Advantage
Desilube additives are documented to deliver equivalent or superior EP/AW performance at treat rates up to three times lower than conventional chlorinated paraffin packages. Lower treat rates mean lower formulation cost, better fluid stability, and reduced environmental load in disposal.
Contact Desilube Inc. for reformulation support and sample quantities: desilubeinc.com/contact