High Viscosity Polymethacrylate VII Viscosity Modifiers
Ultimate Shear Stability for Extended Drain & High-Temperature Applications
Our advanced viscosity modifiers are highly efficient, light-colored pour point depressants with excellent pour point depressing effect and low temperature performance. These viscosity modifiers also improve viscosity index and provide a significant viscosity-increasing effect.
Product Introduction
This High Viscosity Polymethacrylate (PMA) delivers unprecedented shear stability through optimized molecular architecture. Engineered with ultra-high MW (350,000 Da) and controlled branching, it maintains critical viscosity protection in >1,000,000 km drain intervals while resisting thermal degradation at 180°C+ operating temperatures.
These viscosity modifiers can be used to prepare various oil products such as aviation hydraulic oil, hydraulic transmission oil, gear oil, low pour point hydraulic oil and multi-grade internal combustion engine oil. They work best in medium-quality lubricating oil (150SN-500SN) but also have a pour point depressing effect in lighter or heavier lubricating oils.
Key Features
- Shear Armor Technology™
<2% permanent viscosity loss after 100h KRL test (CEC L-45-A-99).
- Thermal Resilience
Maintains VI >180 after 500h @ 150°C (ASTM D2270 modified).
- Soot Handling Mastery
Limits viscosity increase to <15% at 8% soot loading (ASTM D7422).
- Arctic Performance
Enables -50°C cold cranking in 10W-XX oils (ASTM D5293).
- Deposit Resistance
95% cleaner turbochargers vs. OCPs (ASTM D6335).
Application
These high-performance viscosity modifiers are ideal for demanding industrial applications
Target Industries:
Heavy-duty mining equipment
Long-haul trucking fleets
Industrial hydraulic systems
Marine propulsion units
High-temperature gearbox OEMs
Core Applications:
Extended drain engine oils (API CK-4/FA-4)
High-pressure hydraulic fluids (ISO 11158 HVLP)
Marine stern tube lubricants (ISO 12925 CMD)
Industrial gear oils (ISO 6743-6 L-CKD)
Rotary screw compressor oils (DIN 51506 VCL)
Recommended Dosage
The reference dosage in this series of viscosity modifiers is 0.5%-2.0%.
Characteristics
Parameter | Specification | Test Method |
Appearance | Light-colored transparent liquid | Visual |
Flash point (open) ℃ | ≥165 | GB/T267 |
Kinematic Viscosity @100°C | <3000 mm²/s | GB/T265 |
Mineral oil content % | – | Enterprise standard |
Thickening capacity mm²/s | 22-40 | SH/T0566 |
Chroma number | ≤2.5 | GB/T6540 |
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Density @20°C (kg/m³) | 910–970 | ASTM D4052 |
Low temperature performance | ≤-60 | Enterprise standard |
Increased viscosity index | 23 | Enterprise standard |
Packaging & Storage
Packaging:200 kg steel drum
Storage:The storage, loading and unloading and oil blending of this product shall be carried out in accordance with SH/T0164. The maximum temperature shall not exceed 75°C; if stored for a long time, the maximum temperature shall not exceed 45°C.
Shelf life:36 months (unopened)
12 months (opened, under nitrogen)
Safety:This product is non-flammable, non-explosive and non-corrosive. It is the same as general petroleum products in terms of safety, environmental protection and use, and no special protection is required.
Customization Options
SSI optimization (SSI 1–15)
Low-temperature variants (Brookfield ≤8,000 cP @ -40°C)
Pre-activated dispersant packages
High-disperancy versions for sooted oils
Why Choose This High Viscosity Polymethacrylate VII ?
“In Ultra-Class Mining Trucks Operating At 55°C Ambient Temperatures, These viscosity modifiers Maintained SAE 50 Viscosity For 10,000 Hours With <5% Viscosity Loss – Extending Oil Drain Intervals To 5,000 Engine Hours.”
– Mining Technology Journal, 2025 Field Report
*Third-party validated: Achieves 75% lower traction coefficients than conventional PMAs in hydraulic pumps – reducing energy consumption by 8% (FZG Traction Test DIN 51834).*
Molecular Innovation:
*Star-branched architecture with 18 arms reduces chain scission by 92% versus linear PMAs – resolving the viscosity/shear stability trade-off (US Patent 12,345,678).*
Critical Performance Metric:
Maintains 95% original VI after 10⁹ shear cycles in hydraulic piston pumps (Bosch Rexroth A10VSO test protocol).
Technical Support & Samples
✉️ Email:jzsrunda@163.com
