The
clarity of the final clearcoat depends on the amount of Water Based Emulsion added to the
formulation. More than 1% of the amount of the opacity imparted to the product
is transparent. The slightly cloudy gel can be made transparent by the addition
of a 5% solvent such as glycerol, preferably treated Deionized water containing
metal ions.
Water
Based Emulsion is compatible with other polar organic solvents. The clear gel
may even contain more than 50% ethanol. Typically, a water / alcohol mixture is
added to the it. Ethanol can be used to solubilize active additives Avoid the
use of BF-225 like hydrogenated castor oil. In this way, transparent oils
containing essential oils, oil-soluble UV sunscreens, active additives,
film-forming agents can be readily prepared. In the case of high ethanol
content the traditional preservatives are not suitable.
没有评论:
发表评论