Leather scorched black wax adopts senior synthetic wax as the main raw material of water-soluble environmental protection anionic scorched wax, which has strong water-solubility, stable emulsion, no caking on the surface, no precipitation at the bottom, and can be diluted with water in any proportion without layering or breaking the emulsion. After using leather coke wax, it can give the leather surface a strong burning effect and high gloss.
Leather scorched black wax scope of application: widely used in a variety of surface leather surface.
In recent years, semi-crystalline polyester resins for powder coatings have been developed, which have a narrow softening point range, low melt viscosity and a glass transition temperature of less than 45°C. However, the prepared powder coatings have good storage stability and can be obtained without orange lines and excellent appearance of the coating film. Crystalline polyester resin is different from the amorphous ordinary polyester resin for powder coatings, they are a multi-phase mixture, which has a multi-phase shape, opaque white solid at room temperature, low melt viscosity, strong symmetry in chemical structure, insoluble in common hdpe wax lumps organic solvents, such as xylene, petroleum solvents and acetone, etc.
The polyacids and polyols used in the synthesis of semi-crystalline polyester resins are similar to those used in the synthesis of ordinary polyester resins. In order to form polyesters with obvious crystallinity, the polycarboxylic acids and polyols used in the polycondensation reaction preferably contain an even number of carbon atoms, but they are not necessary. The use of aryl or alicyclic monomers with symmetrical substitution of functional groups, such as terephthalic acid, 1,4-cyclohexanedicarboxylic acid, 1.dodeca-cyclohexanedimethanol, is particularly easy to promote the crystallinity of synthetic resins. The formulations, processes and resin specifications for the synthesis of semi-crystalline polyester resins are as follows. In a 5L round-bottom flask equipped with stirrer, fractionation column, oil-water separator, thermometer and nitrogen population, 1198.5g (7.22mol) of terephthalic acid, 1322.4g (7.6mol) of 1,10-decanediol and 0.41g (1.5mmol) of dibutyltin oxide were charged for the reaction.
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