In the case of epoxy coatings, the
VOC requirement for floor coatings calls
for less than or equal to 100 g/L in order
to obtain the credits for LEED ( Leadership in Energy
& Environmental Design, another factor of increasing importance
concerning VOC regulations is the
Green Building ) classification.
The challenge comes from the
fact that most, if not all, of the so-called
solvent-free epoxy coatings quite often
have a nonreactive plasticizer in their
composition. These plasticizers give the
final coating the flexibility necessary to
meet industry requirements. The most
common nonreactive plasticizer used
is BENZYL ALCOHOL (BzOH). This normally
results in a standard VOC content in
excess of 250 g/L, if the BzOH is classed
as a volatile compound. Additionally, as
BzOH is classed as a fugitive plasticizer
(one that volatizes during the drying
process) the coating can lose its flexibility
over the service life as the BzOH
leaches out of the coating.
Benzyl alcohol is added to coating formulations in order to ensure good processing viscosity at low temperatures (about 15° C.). benzyl alcohol as a solvent are its low volatility and
low toxicity. The product is used as a coalescing agent or
as a co-solvent. It has a good performance in dissolving
hydrophobic amines in water- based systems and also acts
as a viscosity-reducing agent in some coating systems.
Benzyl alcohol is a versatile co-solvent used in a wide range
of curing agent formulations for epoxy resins used in coatings,
flooring systems, adhesives, etc. The product can also be used
as a co-catalyst and plasticizer and to keep the temperature
low during the curing process.
In paint strippers benzyl alcohol is used as an environmentally
friendly substitute for methylene chloride. Major applications
are in industrial paint stripping (in particular in formulations
used for aircraft) and in architectural, professional and
do-it-yourself paint stripping.
In the pharmaceutical industry benzyl alcohol is used
as a preservative, in emulsions and ointments and in
insect-bite lotions.
Benzyl alcohol is used as a raw material in the
manufacture of its various esters, which are used in the soap,
perfume and flavor industries and as an intermediate in
the synthesis of polypeptides. Examples of these esters are
benzyl acetate and benzyl benzoate. Benzyl acetate is used
in flavors for its pear-like taste, as a jasmine perfume ingredient
and as a fixative for artificial musks. Benzyl benzoate finds
application in pharmaceuticals, as a fixative in perfumes,
as a flavoring in confectioneries and chewing gums, and
as a softener in lacquers.
Based on the high purity and stable odor profile our benzyl
alcohol is also used for fragrance applications. Other
applications of benzyl alcohol include coatings, lacquers,
photo developer systems, metal cleaning formulations,
cosmetics and hair care applications.
Next opened http://www.sanminglobe.com/2016/09/benzyl-alcohol.html
For any further info please feel free to contact me, 02130338599, WA 087737835317, michael@sanminglobe.com
Rgds,
Michael
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