Developments / New materials

BIOCIDE FOR ANTIFOULING COATINGS

Biocide for thermoplastic antifouling coatings – paints (TCP) on the basis of arsenic sulphide was developed. The addition of arsenic oxide into the composition of biocide provides increased and stable performance lifetime of antifouling coating.

Dependence of TCP lifetime on the concentration of arsenic oxide in biocide:

Biocide composition, %		Fouling of the surface of coating during tests, days
As₂S₃	As₂S₃	40	50	85	120	152	360	380
100	0	Н	55	90	100	100	100	100
92	8	Н	Н	Н	1	5	10	30
0	100	Н	3	50	90	100	100	100
* - fouling value is given in % of total surface of the coating.
Н – complete absence of fouling of the surface of coating.

Comparative toxicity of substances with
respect to bacterial test culture

Advantages:

increased and stable lifetime of antifouling coating;
a decrease in the volume of accumulated arsenic-containing dumps near metallurgical objects that constitute a threat to ecology;
use of gold-arsenic concentrates from a number of deposits, as well as arsenic-containing wastes from lead, tin and copper works to obtain arsenic oxide;
coatings based on arsenic do not contaminate oceanic environment.

Patented in Russia.

Application areas

Protection of the hulls of sea crafts, waterworks, tubings and reinforced concrete constructions working in bioaggressive media, from fouling with various sea organisms.

Contact us:

Institute of Solid State Chemistry and Mechanochemistry SB RAS
Kutateladze str., 18 Novosibirsk, 630128 Russia
Phone: +7(383)332-53-44
Fax: +7(383)332-28-47
E-mail: root@solid.nsc.ru