Popular Science about Dimethyl Silicone Oil
I. Dimethyl silicone oil: A core characteristic of high-performance organosilicon polymers
Dimethyl silicone oil is a polymer composed of an inorganic silicon-oxygen backbone and methyl branches. It is a colorless liquid at room temperature and insoluble in water. Its structural formula is as follows:
Dimethyl silicone oil has a wide range of applications due to its wide viscosity range (from 0.65 to 10,000,002 mm/s), low temperature viscosity coefficient, high expansion coefficient, high flash point, resistance to high and low temperatures, weather resistance, chemical corrosion resistance, radiation resistance, low surface tension, high insulation, and shear resistance.
| characteristic | Parameter range/performance | Industrial value |
| viscosity range | 0.65~1,000,000 mm²/s | Suitable for applications ranging from precision lubrication to high damping. |
| Temperature viscosity coefficient | Approaching zero change | Stable performance under extreme temperatures |
| Temperature resistance | Stable long-term temperature range of -50℃ to +200℃ | Reliable operation in high and low temperature environments |
| Surface tension | As low as 21 mN/m | Highly efficient defoaming/leveling ability |
| Dielectric strength | >15 kV/mm | High-end insulation materials are the first choice |
| Weather resistance/chemical resistance | UV resistant, acid and alkali resistant, radiation resistant | Extend equipment lifespan |
II. In-depth analysis of the five core applications of dimethyl silicone oil
1. Used as a textile auxiliary agent
Methyl silicone oil is widely used as an oiling agent for raw fiber yarns and cotton, as well as for spinning and as a smoothing agent for sewing thread. The oiling agent for raw yarns and cotton is a low-viscosity methyl silicone oil. The smoothing agent for sewing thread is a medium-to-high viscosity methyl silicone oil. Taking advantage of its thermal stability and low viscosity-temperature coefficient, dimethyl silicone oil can be used in the production of spinning oils, primarily in the spinning processes of nylon and polyester, to prevent yarn breakage and loosening.
2. Prepare defoamer:
Dimethyl silicone oil, due to its low surface tension, insolubility in water, good chemical stability in vegetable and animal oils and high-boiling-point mineral oils, and non-toxicity, is used as a raw material for defoamers. Dimethyl silicone oil is mixed with fumed silica to form silicone paste, which is then emulsified to generate a water-based organosilicone emulsion defoamer. Organosilicone defoamers are widely used in the petroleum, chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, and paper industries; adding only 10-100 PPM provides excellent defoaming effects.
3. Prepare the release agent:
Its non-stick properties with rubber, plastics, metals, etc., and its easy film-forming characteristics, make it suitable for use as a release agent in the molding and processing of various rubber and plastic products.
4. As a lubricant:
Used as a lubricant for rubber and plastic bearings and gears. Lubricants made from dimethyl silicone oil are usually used in the form of grease.
