The performance of the modified silicone resin-Hon...

The performance of the modified silicone resin Weathering resistance The siloxane-modified silicone resin can impart excellent weather resistance, so that any kind of an organic resin are dwarfed compared. Improve the weathering resistance of a modified silicone resin with silicone content increases, with both types of silicone and organic resin and the modified method. Industrial evaluation of the weathering resistance of the resin, mainly through changes and discoloration degree of luster will be described. For example, Si-C bond-linked acrylic acid-modified silicone resin, Si-OC key link alkyd-modified silicone resin and a polyester-modified silicone resin and a polyester-modified silicone resin, an alkyd resin and an epoxy resin aging test comparison. Visible by contrast, a modified silicone resin gloss retention and color much better than before the modification, or other organic resin. Modified silicone resin, silicone content on weatherability, room temperature curing alkyd-modified silicone resin for the column. Electrical performance The electrical performance of the modified silicone resin can vary depending on the proportions and type of the organic component. Generally speaking, its electrical properties, such as dielectric strength, volume resistivity and dielectric loss tangent and other less favorable than the silicone resin, silicone resin and superior. Alkyd-modified silicone resin, for example, its volume resistivity is lower than a silicone resin, but higher than the alkyd resin, as a silicone resin and alkyd resin, are decreased with increasing temperature. Again, under the conditions in the same film thickness, dielectric strength of the polyester-modified silicone resin is lower than the silicon resin. Chemical resistance performance Modified silicone resin resistance to chemical agents is superior to the silicone resin, but vary depending on the organic polymer than the column type. Chemical resistance properties of epoxy or acrylic modified silicone resin. Mechanical behavior Have high requirements for mechanical energy in the hardness, elasticity, thermal elasticity and adhesiveness of the resin used as the coating. Silicon resin is used as the coating, the surface hardness is too high, too low, the thermoplastic adhesive is insufficient. The mechanical properties of the modified silicone resin is superior to the silicone resin, can effectively overcome the above drawbacks. Water vapor permeability The modified silicone resin is water repellent and moisture-permeable between the silicone resin with an organic resin, i.e. between the hydrophobicity of the modified silicone resin and silicone resin and moisture permeability of less than and greater than the organic resin. Heat resistance Between the silicone resin with an organic resin, the heat resistance of the modified silicone resin and with the silicone modified resin content increased with the increase also varies with the types of organic resin. Generally modified resin varnish in about 150 ℃ long time use. At this temperature, the film remains intact, without discoloration decomposition. Wherein the polyester and the epoxy-modified silicone resins having a higher heat resistance, and can even be used for a long time at 200 ° C to 250 ° C, little discoloration and cracking. Gloss retention of an alkyd-modified silicone resin film (gb.szrl.net) equally between a silicone resin and an alkyd resin to improve and increase with the silicone content. Alkyd-modified silicone resin, heat resistance and the type of the alkyd resin. Modified silicone resin mixed with a heat-resistant filler (pigment) can be further improved after its temperature. For example, an alkyd-modified silicone resins mixed with aluminum powder, the use temperature may be 150 ° C raise to 450 ° C.