Boron powder is a non-toxic, pollution-free, sterilization, anti-corrosion, abrasion and flame retardant properties non-metallic materials. Therefore, boron-containing specialty surfactants with hydrocarbon surfactants can not be replaced strengths.
This kind of product is non-toxic, non-corrosive, high boiling point, a flame retardant, bactericidal; can be used as gas desiccant, lubricating oils, the additives of the working medium of the compressor; also can be used as a polyvinyl chloride, polyethylene, polyethylene methacrylate an antistatic agent, fogging agent dripproof, dispersing agents and emulsifiers of various substances. Therefore, boron surfactant has a broad application prospects.
Researches by metal powder supplier, covalency of boron atoms and the characteristics of the number of valence electrons less than the number of valence orbit determine the boron atom is an electron-deficient atoms, characteristics of forming compounds bonding can be summarized as covalent, electron-deficient and polyhedralhabits. Based on electrically negative of boron-oxygen bond and boron, boron is a pro-oxygen element, capable of forming a number of the B-O bond-containing compounds, including the B-O bond and an organic group connected to the very wide range of organic boron compound, this is one of the most characteristics of boron forming compound when bonding. The compound used for synthetizing boron specialty surfactants is generally boric acid, the structural unit is a planar triangle, each boron atom is sp2 hybridized with the oxygen atoms binding, boron is still the electron deficient atoms, easily react with the hydroxyl groups in organic compound, the boric acid ester is formed by dehydrating. According to both the molar ratio and the different types of hydroxy compounds may be formed to the boric acid monoester, diester, triester, and the four-coordinated boron spiro structure.
Synthetic boron-based surface active agent, generally use polyhydroxy compound, such as glycerol react with boric acid to generate boric acid ester, intermediate: monoglycerides ester (MGB), iminodiacetic acid ester (DGB). These intermediates with the reactive groups (hydroxyl), can react with fatty acid, a fatty acid chloride, ethylene oxide, epichlorohydrin and other material and the reaction of the corresponding surfactant. Such surface active agents is a boron-based surfactant studied more classes, it mainly includes the monoglycerides and diacylglycerol. Which is more researches about diacylgycerol, this is because the iminodiacetic ester structure containing a semi-polar bond, in solution ionization can form a boron volution structure, so that the boron atom has a negative charge and the structure is stable than monoglycerides.
This surface active agents is the most in-depth study in the boron-containing surface active agent, having a good surface activity, emulsification and dispersion properties, can be used as emulsifying agents, dispersing agents, lubricating oil additives and metal cutting fluid lubrication agent, anti-rust agents and so on. In addition, it is also developed a new kind of surface active agent of boron - phosphorous-containing surfactant in recent years. This surface active agent devide into two categories of oil-soluble and water-soluble. And this surfactants having excellent flame retardant properties, the flame-retardant effect is superior than boron surfactants, phosphorus-surfactant, which is due to is a synergistic effect of boron flame retardancy and phosphorus, chlorine. In addition, there are good emulsifying and dispersing properties. Mainly used as flame retardants, are widely used in various areas of industrial production.
Source:http://www.mhcmp.com
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