CP-2148 is a high-purity, centrifugally purified organoclay grease thickener engineered for precision lubrication applications. Centrifugal purification removes hard mineral impurities — quartz (Mohs 7) and feldspar (Mohs 6) — that standard-purity organoclay grades contain at low but potentially damaging levels. This purification makes CP-2148 the appropriate organoclay thickener for precision bearing grease, high-speed spindle lubrication, and loaded industrial equipment where hard particle contamination reduces bearing fatigue life and triggers premature failure.
Technical Properties
| Parameter | Specification | Notes |
|---|
| Chemical composition | Organic derivative of montmorillonite clay | QAC modified |
| Purification | Centrifugal purification | Zero quartz and feldspar |
| Appearance | Fine white powder | Light-colored grease product |
| Moisture content | ≤ 3.5% | 105°C, 2 hours |
| Fineness | ≥ 98% passing 74 μm (200 mesh) | Sieve analysis |
| Hard impurities (quartz, feldspar) | None detected | Centrifugal classification |
| Pre-gel requirement | Not required | — |
| Polar activator | Not required | — |
| Typical loading | 7–10 wt% | NLGI 1–3 depending on base oil |
Performance vs Conventional Grease Thickeners
| Property | CP-2148 Grease | Lithium Soap Grease | Polyurea Grease |
|---|
| Drop point (ASTM D2265) | > 260°C | ~175°C (Li), ~240°C (Li complex) | > 260°C |
| Continuous service temp. | 150°C | 120–140°C | ~150°C |
| Recovery after overheating | Yes (clay network survives) | No (soap melts irreversibly) | No |
| Hard abrasive particles | Zero (centrifugal purification) | Possible (depends on soap quality) | None |
| Precision bearing suitability | Excellent | Standard — not premium | Good |
| Grease color | Light (white/off-white) | Yellow/amber | Varies |
Zero Hard Impurity Certification: Standard organoclay grades contain trace quartz and feldspar from the bentonite ore. In precision bearing grease at speeds above 3,000 rpm, particles harder than the bearing steel (Vickers hardness ~700 HV) act as three-body abrasives — even at concentrations below 100 ppm. CP-2148's centrifugal classification removes all particles harder than the clay platelets themselves (Mohs ~2), producing grease that is genuinely non-abrasive across all operating conditions.
Applications
| Application | CP-2148 Loading | Base Oil Type |
|---|
| Precision bearing grease (high speed) | 7–9 wt% | PAO, ester synthetic, mineral |
| High-load industrial bearing grease | 8–10 wt% | High-viscosity mineral or PAO |
| High-temperature kiln bearing grease | 9–12 wt% | Naphthenic mineral, polyester |
| Steel mill roll neck grease | 8–12 wt% | High-viscosity mineral |
| Precision instrument lubrication | 7–9 wt% | PAO, ester |
Grease Production Procedure
- Add CP-2148 directly to base oil at 7–10 wt% — no pre-gel or polar activator required
- Mix at high speed for 25–30 minutes
- Add additives (antioxidant, rust inhibitor, EP agents)
- Pass through colloid mill and homogenizer — critical step; prolonged shear processing in the mill improves texture homogeneity
- Deaerate, filter through precision filter (recommend ≤25 μm absolute filtration for precision grease applications)
- Package
Frequently Asked Questions
Why does CP-2148 undergo centrifugal purification?
Centrifugal purification removes quartz (Mohs 7) and feldspar (Mohs 6) — hard mineral impurities present at trace levels in standard bentonite. In precision bearing grease, even trace hard particles act as abrasives at high speed, scoring bearing surfaces and triggering fatigue failure. CP-2148's zero hard impurity specification eliminates this contamination risk, producing genuinely non-abrasive grease for precision bearing applications.
What is the maximum service temperature of CP-2148 grease?
CP-2148 grease provides continuous service at 150°C with peak tolerance to 180–200°C. This exceeds standard lithium soap grease (120–140°C continuous) and equals polyurea grease (150°C) — but unlike polyurea, CP-2148 grease recovers consistency after overheating because the clay platelet network does not melt. Drop point exceeds 260°C by ASTM D2265.
High temperature stability guide → How does CP-2148 compare to molybdenum disulfide (MoS₂) grease?
CP-2148 grease matches MoS₂ grease in high-temperature stability (both 150°C continuous). Key advantages of CP-2148 over MoS₂: higher drop point (>260°C vs ~200°C for MoS₂-modified lithium); light-colored grease (not black) — suitable where MoS₂'s black color is unacceptable; no sulfur contamination risk. For extreme-pressure boundary lubrication, add EP additives separately to CP-2148 grease as organoclay alone does not provide MoS₂'s boundary film.
Packaging and Storage
| Parameter | Specification |
|---|
| Standard packaging | 25 kg kraft paper bags with PE inner liner; 22.68 kg bags available |
| Shelf life | 2 years from manufacture date |
| Storage conditions | Cool, dry, well-ventilated warehouse; avoid moisture |
Related grades: CP-2143 (naphthenic/paraffin mineral oil base) ·
CP-250A (synthetic/vegetable oil base) ·
CP-21A (high purity, mineral oil base)
Related applications: Lubricating Grease ·
High Temperature Stability ·
High-Temperature Grease Guide
