Chinese Name: silicone oil
Chinese alias: organic silicone oil; hard foam silicone oil; foam homogenizer; polysiloxane; methyl silicone oil; dimethyl silicone oil; dimethylpolysiloxane; dimethylsilicone oil
English Nicknames: hard foam silicon (an even vegetable); hard foam silicon; methyl silicone oil, polydimethylsiloxane
CAS No.: 63148-62-9
Molecular formula: C6H ₁₈ OSI Ψ
Molecular weight: 162.37932
Physical property data
Melting point - 50 ° C
Refractive index 1.403-1.406
Flash point 300 ° C
Water soluble practically insoluble
Silicone oil is a kind of polyorganosiloxane with different degree of polymerization chain structure. It is prepared by hydrolysis of dimethyldichlorosilane with water to obtain the primary polycondensated ring. The ring is cracked rectified to obtain low ring. Then the ring body, capping agent catalyst are put together to adjust polymerize to obtain various mixtures with different polymerization degrees. The low boiling matter can be removed by vacuum distillation to obtain silicone oil.
Avoid in the humid environment, the storage temperature should be kept below 25 ℃, try to avoid sunlight exposure, away water heat sources. In order to prevent moisture absorption oxidation, it is recommended to fill the container with nitrogen. If the storage temperature is higher than 40 ℃, the product quality will be reduced. Short time heating cooling has little effect on the quality of the product, but it should be noted that the viscosity of the product will increase significantly at a lower temperature, which may bring some difficulties to the production process.
quality guarantee period
Under the correct storage conditions, the shelf life is 6 months the date of production, can still be used after re inspection.
Website optimization information:
The total number of specific hydrogen of starting stopping agents determines the degree of polymerization of polyether polyol 450. Methacrylates generated by different starting stopping agents have a great difference in reflecting specificity. In general, when the relative molecular weight of customized polyether is large, the specificity of methacrylate with Po type, ethylenediamine aniline as starting stopping agents is high, pentaerythritol is higher The specificity of methacrylate with polyether polyols as starting stopping agents was higher than that with ethylene glycol propylene glycol as starting stopping agents. For the same kind of methacrylate, the higher the hydroxyl value, the smaller the relative molecular weight, the higher the reaction specificity the smaller the viscosity. In general, EO terminated methacrylates have higher specificity better water absorption than all Po terminated methacrylates. The higher the EO composition, the more significant the development trend. When the polymerization degree is 2 3, the starting ending agents are 1,2-propanediol, ethylene glycol, trimethylolpropane gas vaseline, the ring opening transfer function of Po is used to carry out convergence. Generally, the sequence number is 210220330, the number means the degree of polymerization, the following two numbers mean the relative molecular weight. Methacrylate 210 is a kind of air oxidation polyethylene glycol with polymerization degree of 2 molecular weight of 1000. the perspective of reflecting specificity to distinguish polyether polyol network can make us understand the secret recipe the perspective of molecular structure, which is conducive to improve the efficiency of the experiment prevent loss of direction. The secret recipe is very few. Only one kind of methacrylate is used, most of them are used together to obtain the balance of characteristics. The closer the distance between the specific gradient directions is, the more practical effect of consistency of dry solid can be obtained in the middle late ripening period, the more the characteristics can be reflected. However, due to the large distance between the dry solid gradients, it is necessary to consider a variety of catalytic reaction problems. The more the distance is, the more likely it will lead to incomplete dry solid, resulting in unsuccessful design of secret recipe.