Silicon is one of the most abundant elements in nature, Organic Polysiloxanes it accounts for about 25.7% of crustal quality, second only to oxygen. In nature there is no free state of pure silicon, but in the form of oxides, such as silica and silicate. Si-O-Si bonds as the main structure of polysiloxane appear in the common inorganic substances such as sand, stone, glass, ceramics, and quartz.
Silicone Si-O-Si bond length is longer, the bond angle is larger, easy to rotate, its side chain rotation of the small resistance, molecular volume and cohesive energy density is low, reducing the steric hindrance, Organic Polysiloxanes The free rotation of the substrate is relatively easy, with low glass transition temperature, low surface tension and surface energy, low solubility parameters and low dielectric constant characteristics.
Polysiloxane resin is a semi-inorganic, Organic Polysiloxanes semi-organic structure of the polymer compounds, which both organic polymer and inorganic polymer properties. These properties include high and low temperature resistance, weathering resistance, electrical insulation, ozone resistance, Organic Polysiloxanes hydrophobic, flame retardant, physiological inertia, oil resistance, solvent resistance, radiation resistance.
The most classic practical application is the inorganic zinc-rich coating, the base material composition of silicates, the coating as anti-corrosion coating can provide up to 50 years of durable life. And as the surface coating of epoxy - silicone system because of its excellent weather and corrosion resistance also has more than 20 years of practical application.
When the organic group is methyl, Organic Polysiloxanes it can give the silicone resin thermal stability, mold release, hydrophobicity, arc resistance; when the phenyl, give the silicone resin oxidation stability, within a certain range Can break the crystallinity of the polymer.
Reaction with alcohol as a solvent, Organic Polysiloxanes add a small amount of water to control the reaction process. First, the alkoxyl component is converted into an alcohol by hydrolysis to form a sol, and then the coated sol is dried to form a gel coat having a microporous structure, Organic Polysiloxanes and finally subjected to high temperature curing to form a highly dense ceramic coating.
Polysiloxane large-scale commercialization in industrial coatings in the nineties, Organic Polysiloxanes the current single use is not.
Formulators can be used with polysiloxanes and many organic monomers and polymers to develop specific blends that have both organic and functional properties. "Organic - inorganic hybrid" coating is used with polysiloxane resin containing organic modified resin.