Solvent-free pure silicone emulsion and waterborne silicone special function coating

Silicone resin has excellent thermal oxidation stability, weather resistance, electrical insulation, hydrophobicity and corrosion resistance, has been widely used in high and low temperature resistance insulating paint, special coatings, adhesives, film plastics and so on. But the current organic silicon resin is high and low temperature resistance, organic silicon waterproof coatings and special coatings mainly use the organic matter such as aromatic hydrocarbons, alcohols, such as solvent, can produce a large number of VOC (volatile organic compounds), and cause great harm to environment and human body, so the waterborne silicone is current research hotspot and development trend.

, water-based silicone is silicon resin with water as dispersion medium silicon resin emulsion, the current widely used to focus on organic silicon modified coatings, such as silicone modified acrylic emulsion, silicon modified polyurethane emulsion, silicone modified polyester emulsion, etc., organic silicon, introduced in the traditional polymer emulsion, can enhance its resistance to ageing, waterproof, high and low temperature properties, such as, hard. Through in the process of emulsion polymerization, the introduction of organic silicon in the molecular structure of the polymer chain section, commonly used organic silicon precursor for silane coupling agent, silane coupling agent 171560570 and so on, for example, the silane coupling agent are three faculties alkoxy structure, in the water phase system alkoxy hydrolysis into hydroxyl, hydroxy further dehydration condensation, to form crosslinked structure, When connecting to spend will affect the stability of the emulsion, cause gelation, cannot use, so for the amount of silane coupling agent is a certain limitation, the general dosage was 1% ~ 10%, the dosage is too small modification effect is not obvious, influence the stability of the emulsion dosage is too big, dosage of restriction determines the effect of the silicone modified is limited, even is not obvious.

Moreover, silane coupling agent in the water phase, and the hydrolysis reaction by-product methanol, ethanol and other low molecular alcohols, belong to flammable toxic ingredients, for waterborne coatings, it is the VOC, and the index of VOC is coating of strict control, so the silane coupling agent modification of waterborne coatings can not fundamentally solve the problem of low VOC and zero VOC, will make the application is restricted.

Solvent-free pure silicone emulsion industrialization just solve the problem above, solvent-free pure silicon resin is silane coupling agent hydrolytic condensation in advance into solid silicon resin, the solid silicone does not contain alkoxy, avoids the release of the use of alcohol, then the use of special emulsifying process, the solid silicone evenly dispersed in the water, forming a stable emulsion. Solvent-free pure silicone avoids both the introduction of solvents and the release of by-product solvents, and fundamentally achieves green environmental protection and zero VOC.

In terms of application, solvent-free and pure silicone emulsion acrylic latex, polyurethane emulsion latex, alkyd, polyester resin emulsion, fluorocarbon emulsion, such as wax emulsion latex with arbitrary proportion miscibility, does not need special production process, can be used as long as the dispersed evenly, won't cause gel, demulsification, infinite introduction of silicone composition can maximize the performance of organic silicon, Both modified silicon coatings and modified silicon coatings can be prepared, giving full consideration to the properties of both.

Solvent-free pure silicone emulsion can also be used directly as a varnish. It can be directly used in occasions requiring high transparency, such as wood paint. It has higher hardness, water resistance and stain resistance than the existing acrylic emulsion and polyurethane emulsion without covering the surface topography and texture of the substrate or even affecting the luster. Has been successfully used in concrete, stone, rock wool, clay, wood, paper, cultural relics, metal and other waterproof protection and water in water (sand), stone paint and other exterior wall cover.

Solvent-free pure silicone emulsion solvent silicone retained the various performance, also can make special functional coatings, such as silicone heat resistant coatings, organic silicon weather resistance coatings, organic silicon insulation paint, silicone elastic coating, silicone waterproof coating, etc., to today's environmental requirements higher and higher, water-borne special functional coatings has a more broad space for development.

Solvent-free pure silicone emulsion can make a room temperature curing, also can heat cure, can make a two-component system also can make one-component system, can be used directly and also can be used with, fundamentally achieved the health, environmental protection, green, efficient, is a great innovation of water-based coatings, solvent-free pure silicone emulsion was fueled the rapid development of waterborne coatings, It can be said without modesty that water paint ushered in the era of water-based silicone!