Viscosity index improvers are essential additives that enable lubricants to maintain optimal viscosity across wide temperature ranges. At Runda Chemical, we’ve pioneered advanced viscosity index improver technologies that redefine performance standards in modern lubrication.
Industry Insight: Proper VI improvers can extend equipment life by 40%
Understanding Viscosity Index Technology
The Oil Viscosity Index measures how much oil’s viscosity changes with temperature. High VI oils maintain more stable viscosity, providing better protection across operating conditions. Viscosity index improvers for lubricating oils are specialized polymers that expand at high temperatures to maintain thickness and contract at low temperatures to ensure flowability.
Low Temperature: Polymer chains contract → Lower viscosity for easy flow
High Temperature: Polymer chains expand → Higher viscosity for protection
Types of Viscosity Improvers
Different applications require specific types of viscosity modifiers:
Polymethacrylate (PMA)
Our pma viscosity index improver offers excellent shear stability and low-temperature performance. Polymethacrylate viscosity index improver technology is ideal for hydraulic oils and gear lubricants requiring consistent performance.
Olefin Copolymers (OCP)
OCP-based viscosity improver provides cost-effective thickening with good thermal stability. Excellent for engine oils and transmission fluids.
Styrene-based Polymers
Styrene-isoprene and styrene-butadiene copolymers offer superior thickening efficiency. Often used as an engine oil thickener additive in multi-grade motor oils.
Key Benefits of VI Improvers
Advanced viscosity index improver additives provide essential performance enhancements:
Temperature Stability
Maintains optimal viscosity from -40°C to 150°C, ensuring protection in extreme conditions
Fuel Efficiency
Reduces energy consumption by 3-5% through optimized fluid friction
Wear Protection
Maintains protective oil film thickness under high-temperature, high-load conditions
Cold Start Protection
Ensures adequate flow for immediate lubrication during cold weather starting
Selecting the right viscosity modifying agent requires understanding technical parameters:
- Shear Stability Index (SSI): Measures resistance to mechanical breakdown
- Thickening Efficiency: Viscosity increase per unit concentration
- Molecular Weight Distribution: Affects both thickening and stability
- Compatibility: Interaction with other additives and base oils
- Thermal Stability: Resistance to thermal degradation
Runda Viscosity Index Improver Series
Our flagship viscosity index improver technology combines advanced polymer architecture with superior shear stability. The RundaVI Pro series represents the pinnacle of viscosity index improvers for lubricating oils technology.
Key advantages of Runda Viscosity Index Improver Series:
- Shear Stability Index (SSI) below 25 for extended service life
- Thickening efficiency 30% higher than conventional VI improvers
- Excellent compatibility with synthetic and mineral base oils
- Superior low-temperature performance down to -50°C
- Enhanced thermal stability up to 300°C
- Reduced volatility for lower oil consumption
| Performance Metric | Conventional VI Improvers | Premium VI Improvers | Runda series |
|---|---|---|---|
| Shear Stability Index (SSI) | 35-45 | 25-35 | 15-25 |
| Thickening Efficiency | Baseline | 15-20% improvement | 25-30% improvement |
| Low-Temperature Performance | -30°C | -40°C | -50°C |
| Thermal Stability | 250°C | 275°C | 300°C |
EPR Ethylene Propylene Rubber J0010 ★★★★★ (88reviews)
EPR Ethylene Propylene Copolymer J0050 ★★★★★ (83 reviews)
PIB Additive Polyisobutylene PIB950 ★★★★★ (70reviews)
PIB Polyisobutylene Adhesive PIB1300 ★★★★★ (69 reviews)
PIB Polyisobutylene PIB2400 ★★★★★ (65reviews)
Polymethacrylate Viscosity Index Improver★★★★★ (73 reviews)
Hydrogenated Styrene Isoprene Polymer ★★★★★ (70reviews)
High Viscosity Polymethacrylate VII ★★★★★ (83 reviews)
Polymethacrylate For Gear Oil ★★★★★ (88reviews)
Polymethacrylate For Low Freezing Point Hydraulic Oil ★★★★★ (53 reviews)
Water-Soluble High Molecular Weight Polyether★★★★★ (50reviews)
Metallocene Polyalphaolefin PAO1000 ★★★★★ (73 reviews)
Metallocene Polyalphaolefin PAO2000 ★★★★★ (78reviews)
Engine Oil Applications
For viscosity index motor oil formulations, our additive to thicken engine oil provides the perfect balance of high-temperature protection and cold-start performance. Typical treat rates range from 3-8% depending on the desired viscosity grade.
Hydraulic and Gear Oils
Industrial applications benefit from our specialized viscosity modifier formulations that maintain consistent performance under varying loads and temperatures.
Tackifier Applications
Our Tackifier technology enhances oil adhesion for applications requiring improved lubricant retention on metal surfaces.
“We were struggling with viscosity breakdown in our high-performance engine oils. Runda Chemical’s pma viscosity index improver solved our shear stability issues and allowed us to extend drain intervals by 50% while maintaining excellent protection.”
“Our hydraulic systems operating in arctic conditions required a viscosity modifying agent that could perform at -45°C. RundaVI Pro delivered exceptional low-temperature flow while maintaining high-temperature viscosity for optimal pump protection.”
What is the difference between viscosity index improvers and thickeners?
While both viscosity modifiers and thickeners increase oil viscosity, VI improvers are temperature-sensitive polymers that provide balanced performance, whereas simple oil thickener additives increase viscosity uniformly across all temperatures.
How do PMA viscosity index improvers compare to OCP?
Polymethacrylate viscosity index improver (PMA) offers superior shear stability and low-temperature performance compared to Olefin Copolymers (OCP). PMA is ideal for applications requiring extended service life and extreme temperature operation.
Can viscosity index improvers be used as engine oil thickener additives?
Yes, viscosity index improver additives serve as effective engine oil thickener additive solutions, providing the dual benefit of viscosity enhancement and temperature stability for multi-grade engine oils.
- Extended temperature range operation
- Improved fuel efficiency
- Enhanced equipment protection
- Reduced oil consumption
- Extended drain intervals
- Better cold-start performance
- Multi-grade engine oils
- Hydraulic fluids
- Gear oils
- Transmission fluids
- Compressor oils
- Industrial lubricants
- Shear Stability Index (SSI)
- Thickening Efficiency
- Molecular Weight
- Thermal Stability
- Low-Temperature Viscosity
- Compatibility
As leading lubricant additive manufacturers based in Jinzhou, China, we’ve served global industries since 1996. Our 15,000m² R&D and production facility develops cutting-edge solutions for lubrication challenges across sectors.
Partner with Lubricant Additive Experts
Discover how Runda Chemical’s advanced additive technology can transform your operations. Contact our technical team for a comprehensive assessment and customized solution.
Email:jzsrunda@163.com
