Increasing complexity of microbial control due to
technology and regulatory changes makes it difficult for
paint formulators to find a suitable biocide solution.
“No single active biocide can cope with today’s microbial challenges while complying with all safety and
environmental labels,” asserts Magri. Therefore, local
technical and regulatory support from a reliable partner
is becoming more important for paint companies.
Dow Microbial Control uses technology to help
customers optimize formulations. Its Taunovate high
throughput testing capability enables the company to
test numerous actives and blends to solve its customers’
unique challenges. “We believe we are well positioned
to help customers choose the right active or active combination to achieve mold-resistant and antimicrobial
properties, as well as reduce VOC and odor concerns,”
Magri says.
Recently, the company introduced new antimicrobi-
als for industrial water-based products. Bioban™ IPBC
Table 3—Common Coating Biocides
Dry Film Biocides
CT
40 LE and Bioban Ultra Bit 20 LE control bacteria,
yeasts, and fungi and are low VOC, low viscosity, clear,
function over a wide pH range, have a low freezing
point, and are freeze-thaw stable and formaldehyde-free. Rocima™ 586 Industrial Microbiocide is a VOC-free, broad spectrum preservative that offers fast acting
ability, two different modes of biocidal activity for
increased microbial protection, and has clearances with
the FDA and BfR.
Troy Corporation has also launched new products,
targeting potential growth areas in the market. Mergal
753 is a zero-VOC, solvent-free, high concentration BIT
dispersion that, according to Donald Shaw, offers the
smallest carbon footprint of any wet-state preservative
product available. Troysan 1050 is the first product in
the company’s new line of antibacterial materials for
dry film protection and works against gram positive
bacteria, gram negative bacteria, and MRSA (Methicillin
resistant Staphylococcus aureus). It can be incorporated
into a variety of coating types, mak-
ing it applicable for walls, ceilings,
counters, floors, and many other
surfaces.
ISP has also launched new zero-VOC biocide dispersions. Fungitrol
940 is a 40% IPBC dispersion.
Nuosept BMC 422, a BIT/MIT CIT/
MIT, and Nuosept W, a Bronopol/
CIT/MIT blend for lower pH formulations as well as inks and adhesives
applications, are both no-VOC non-formaldehyde preservatives.
For a list of the common coating
biocides, see Table 3.
In the coming years, most producers expect a long-term shift away
from formaldehyde donors and
legacy chemistries. “Despite the
current economic slowdown and
the significant decline in paint and
coatings demand, a move to replace
legacy biocides in existing formulas
with greener-type products is under-way, creating growth opportunities
through technology conversion,”
states Hertenberger. New product
launches focused on eco-friendly
paint will create additional growth
potential. “Successful biocide manufacturers will develop product formulations that address constantly evolving performance requirements, ever
more stringent environmental regulations, and growing consumer expectations,” Hertenberger concludes.
CAS
CAS
CAS
3-Iodo-2-propynyl butyl carbamate (IPBC) ....................................................... 55406-53-6
2-n-octyl-4-isothiazolin-3-one (OIT)................................................................ 26530-20-1
4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) .......................................... 64359-81-5
Tetrachloroisophthalonitrile (chlorothalonil).......................................................1897-45-6
N-(trichloromethylthio) phthalimide (Folpet)........................................................133-07-3
Carbendazim ................................................................................................ 10605-21-7
Zinc pyrithione (ZPT) .................................................................................... 13463-41-7
In-Can Preservatives
5-Chloro-2-methyl-4-isothiazolin-3-one (CMIT) ................................................. 26172-55-4
2-methyl-4-isothiazolin-3-one (MIT)..................................................................2682-20-4
1,2-Benzisothiazolin-3-one (BIT)......................................................................2634-33-5
4,4-dimethyloxazolidine/formaldehyde adduct (Oxazolidine)............................... 51200-87-4
2-hydroxymethylamino ethanol/formaldehyde adduct ........................................ 34375-28-5
2-Bromo-2-nitro- 1,3-propanediol (BNPD): Bronopol................................................ 52-51-7
1,5-Pentanedial: Glutaraldehyde .........................................................................111-30-8
1-(3-chloroallyl)- 3, 5,7-triaza-1-azodiadamantane chloride (Dowicil 75)..................4080- 31-3
Marine Antifoulant Biocides
Zinc pyrithione (ZPT) .................................................................................... 13463-41-7
Copper pyrithione (CPT)................................................................................. 14915-37-8
4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (Sea Nine) ...................................... 64359-81-5
Butyl-N-cyclopropyl-6-(methylthio)- 1, 3,5-triazine- 2,4-diamine (Irgarol 1051) ....... 28159-98-0
3-( 3,4-dichlorophenyl)- 1,1-dimethylurea (Diuron) .................................................330-54-1
Dichlofluanid (e.g., Preventol A 4-S from Lanxess)..............................................1085-98-9
Tolylfluanid (e.g., Preventol A 5-S from Lanxess) ..................................................731-27-1
Pyridine-triphenylborane....................................................................................971-66-4
