Index of waterproof coating emulsifier

2021-09-25   Pageview:766

Chemical composition: Cetyl trimethyl ammonium chloride

Appearance: light yellow solid
Active matter content, %: 70±2.0
Free amine content, %: ≤2.0
pH value (10% aqueous solution) : 6.0~8.0















(H MHEC hydrophobically modified hydroxyethyl cellulose is similar to hydrophobically modified hydroxyethyl cellulose polyether. Ethyl hydroxyethyl cellulose can also be hydrophobically modified. The reaction of chain alkyl epoxides or long-chain alkyl chlorides [58]. Relative to H MHEC

The molecular mass of CH, -CH, -OH is usually 300,000, which is significantly lower than the relative molecular mass of the general-purpose hydroxyethyl cellulose OHCHOH vinculin thickener of 500,000 to 100-Q million. In addition to OHQHOH, H MHEC has a lower degree of substitution than CHyOHCH, and its thickening mechanism is similar to that of the thickener CH, -CH-CH, -O-(CH); -CH, in the water phase of OHHAS E. , This is the principle of association and micelle bridging L50. The adsorption strength on the surface of the latex hydrophobically modified hydroxyethyl particles is affected by the degree of substitution of the cellulose molecular structure H MHEC, and also by the molecular weight, the type of surfactant used in the synthetic emulsion, and the concentration of the surfactant [60 “. Molecular structure of hydrophobically modified hydroxyethyl cellulose.
The additional associative thickening mechanism of H MHEC compensates for some of the defects of HEC and achieves the equilibrium rheological properties that can usually only be achieved by HEUR thickeners. As the relative molecular mass of H MHEC is further reduced, its performance will be closer to HEUR.

Inorganic thickener
Porcelain clay with flaky crystalline structure and calcined amorphous inorganic silicon show the function of swelling in the water phase [61], which can adjust the viscosity of the finished micronized ptfe adhesive latex paint. Some hydrophilic calcined inorganic silicon is a kind of An ideal auxiliary method, hydrophobic inorganic silicon is often recommended for putty for anti-corrosion paint, primer and baking paint. Non-modified bentonite, hectorite flakes, natural silica montmorillonite [6al, acicular activated clay (at tapu lg it), and synthetic fine particle hectorite can all be used in latex paint.


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