Patent Application
20170238545
The invention relates to new chemical compounds—zinc and copper salts with organic acids which can find application as biocides.
Various zinc and copper compounds exhibiting biocidal activity are known in the art, in particular, zinc and copper oxides and inorganic salts (U.S. Pat. No. 5,540,954, A01N 59/16, A01N 59/20, B27K 3/52, B05D 07/06, A01N 31/08, A01N 31/00, 1996; U.S. Pat. No. 6,858,658, A01N 59/20, A01N 59/16, C09D 5/16, C08K 03/10, C08K 03/18, C08K 03/22, 2005; US 20080219944, C09D 5/16, 2008; US 20090223108, C09D 5/16, C09D 5/14, 2009), zinc and copper naphthenates or resinates (EP 2161316, C09D 133/06, C09D 133/12, C09D 143/04, C09D 5/16, C09D 7/12, 2010; EP 2360214, C09D 143/04, C09D 193/04, C09D 5/16, 2011; U.S. Pat. No. 4,258,090, C04B 41/45, C04B 41/52, C04B 41/60, C04B 41/70, B05D 03/02, 1981), ammonia complexes of zinc salts (U.S. Pat. No. 5,460,644, C08K 3/10, C08K 3/00, C09D 5/14, C09D 5/00, 1995), zinc and copper pyrithionates—bis-(2-(pyridylthio)-1,1′-dioxides (U.S. Pat. No. 5,185,033, C09D 5/14, C09D 5/16, 1993; U.S. Pat. No. 5,298,061, C09D 5/16, C09D 5/14, 1994; U.S. Pat. No. 5,717,007, C09D 5/16, C08L 33/10, C08K 05/17, C08K 05/18, 1998; U.S. Pat. No. 6,399,560, A01N 43/40, A01N 43/34, A61L 2/18, C11D 3/48, 2002; U.S. Pat. No. 7,410,553, D21C 5/02, B32B 27/04, D21G 1/02, 2008). The above mentioned compounds were used with various degrees of efficiency as additives to coatings intended for treatment of building structures, prevention of underwater structures and ship parts from fouling as well as paper and wood treatment.
Zinc salt with acetic and methacrylic acids, i.e. zinc methacrylate-acetate (hereinafter referred to as ZMA) exhibiting a certain biocidal activity when compounded with aqueous styrene-acrylic dispersion being used as polymer pruner for applying paint coatings to various surfaces is also known (RU 2315793, C09D 5/14, C09D 131/02, C09D 133/10, 2008).
The closest analogues of the proposed compounds are zinc or copper (II) salts with two acids one of which is acrylic or methacrylic acid and the other is aliphatic carboxylic acid selected from the group including propionic, capronic (hexanoic), caprilic (octanoic), palmitic (hexadecanoic), linolic (octadecadienoic), oleic (octadecenoic), stearic (octadecanoic), nonadecanoic acids. The above compounds are known from ACS on STN (RN 71502-44-8, 177957-21-0, 299216-74-3, 299216-75-4, 299410-52-9, 299217-71-3, 299410-54-1, 299217-78-0, 299217-75-7, 299217-73-5, 299216-77-6, 299216-70-9, 299216-72-1, 561007-33-8) and can be described by the general formula:
wherein M-Zn or Cu,
R1—H or CH3,
R2—C2H5, C5H11, C7H15, C15H31, C17H31, C17H33, C17H35, C18H37.
The data on the biological activity of these compounds are not available.
To provide new means effecting on microorganisms zinc or copper (II) salt of the general formula is proposed:
wherein M-Zn or Cu, R1—H or CH3, R2—C2-C25 alkyl, excluding
CH2═C(CH3)—COO—Zn—O—CO—C2H5, CH2═CH—COO—Zn—O—CO—C2H5,
CH2═CH—COO—Cu—O—CO—C2H5, CH2═C(CH3)—COO—Zn—O—CO—(CH2)4—CH3,
CH2═CH—COO—Zn—O—CO—(CH2)4—CH3, CH2═CH—COO—Zn—O—CO—(CH2)6—CH3,
CH2═C(CH3)—COO—Zn—O—CO—(CH2)6—CH3,
CH2═CH—COO—Cu—O—CO—(CH2)6—CH3,
CH2═CH—COO—Zn—O—CO—(CH2)14—CH3,
CH2═C(CH3)—COO—Zn—O—CO—(CH2)16—CH3,
CH2═C(CH3)—COO—Zn—O—CO-iso-C17H35, CH2═CH—COO—Zn—O—CO-iso-C17H35,
CH2═C(CH3)—COO—Zn—O—CO—(CH2)17—CH3,
or R2—CO—O— group is crotonate, or sorbate, or linoleate.
To solve the same problem it is also proposed to use zinc or copper (II) salt of the general formula
wherein M-Zn or Cu, R1—H or CH3, R2—C2-C25 alkyl or R2—CO—O— group is crotonate, or sorbate, or linoleate, as a biocide.
It was surprisingly found that zinc and copper (II) salts corresponding to the above formula along with bactericidal and fungicidal activities also exhibit high virucidal activity which ZMA substantially lacks.
The essence of the invention is illustrated by examples given below. Examples 1-13 describe the preparation and properties of certain representatives of the proposed series of substances, examples 14-31 and 38-49—their virucidal activity. Examples 32-37 and 50 are comparative and illustrate substantial absence of virucidal activity of ZMA in conditions described in examples 14-31 and 38-49. Example 51 illustrates bactericidal activity and examples 52-66—fungicidal activity of representatives of the proposed series of substances.
50 g of crotonic (2-butenoic) acid and 200 ml of distilled water are placed into a 500 ml round-bottom flask. Then a suspension of 46.76 g of zinc oxide in 100 ml of distilled water is gradually added to the solution under constant stirring, whereupon 41.86 g of acrylic acid is added, and the suspension is stirred until completely dissolving solids. The obtained solution is evaporated to dryness at temperature of not more than 70° C. and the resulted solid product is subjected to recrystallization from distilled water. 127 g of water-soluble powdered zinc acrylate-crotonate with melting point of 180° C. is obtained which corresponds to the above general formula wherein R1═H, R2═C3H5 (98.7% yield of the stoichiometric). The results of elemental analysis of salts obtained as described in this and subsequent examples are given in Table 1.
Zinc methacrylate-butyrate (R1═CH3, R2═C3H7) with melting point of 202° C. is obtained in 99% yield of the stoichiometric by analogy with Example 1 using methacrylic acid instead of acrylic one and butyric (butanoic) acid instead of crotonic one.
Zinc acrylate-capronate (R1═H, R2═C5H11) with melting point of 185° C. is obtained in 98.4% yield of the stoichiometric by analogy with Example 1 using capronic (hexanoic) acid instead of crotonic one and heating acid suspension in water up to 175° C. until capronic acid is completely dissolved whereupon zinc oxide and subsequently acrylic acid are added.
Copper acrylate-propionate (R1═H, R2═C2H5) with melting point of 185° C. is obtained in 99% yield of the stoichiometric by analogy with Example 1 using propionic (propanoic) acid instead of crotonic one and copper (II) oxide instead of zinc oxide.
Copper methacrylate-valerate (R1═CH3, R2═C4H9) with melting point of 185° C. is obtained in 95% yield of the stoichiometric by analogy with Example 3 using methacrylic acid instead of acrylic one, valerianic (pentanoic) acid instead of capronic one and copper (II) oxide instead of zinc oxide.
Copper methacrylate-sorbate (R1═CH3, R2═C5H7) with melting point of 220° C. is obtained in 93% yield of the stoichiometric by analogy with Example 3 using methacrylic acid instead of acrylic one, sorbic (2,4-hexadienoic) acid instead of capronic one and copper (II) oxide instead of zinc oxide.
Copper acrylate-caprinate (R1═H, R2═C9H19) with melting point of 187° C. is obtained in 97.8% yield of the stoichiometric by analogy with Example 3 using capric (decanoic) acid instead of capronic one and copper (II) oxide instead of zinc oxide.
Copper methacrylate-laurate (R1═CH3, R2═C11H23) with melting point of 210° C. is obtained in 97% yield of the stoichiometric by analogy with Example 1 with the difference that the process is carried out in ether medium using methacrylic acid instead of acrylic one, lauric (dodecanoic) acid instead of capronic one and copper (II) oxide instead of zinc oxide.
Zinc acrylate-undecylate (R1═H, R2═C10H21) with melting point of 177° C. is obtained in 95% yield of the stoichiometric by analogy with Example 8 using undecylic (undecanoic) acid instead of lauric one.
Copper acrylate-stearate (R1═H, R2═C17H35) with melting point of 198° C. is obtained in 96% yield of the stoichiometric by analogy with Example 8 using stearic (octadecanoic) acid instead of lauric one and copper (II) oxide instead of zinc oxide.
Zinc methacrylate-myristate (R1═CH3, R2═C13H27) with melting point of 215° C. is obtained in 98% yield of the stoichiometric by analogy with Example 8 using methacrylic acid instead of acrylic one and myristic (tetradecanoic) acid instead of lauric one.
Copper acrylate-linolenoate (R1═H, R2═C17H29) with melting point of 178° C. is obtained in 97% yield of the stoichiometric by analogy with Example 8 using linolenic (3,6,9-octadecatrienoic) acid instead of lauric one and copper (II) oxide instead of zinc oxide.
Zinc acrylate-cerotinoate (R1═H, R2═C25H51) with melting point of 181° C. is obtained in 98% yield of the stoichiometric by analogy with Example 8 using cerotinic (hexacosanoic) acid instead of lauric one.
Virucidal activity of zinc acrylate-capronate obtained as described in Example 3 against human immunodeficience virus (HIV) was investigated in suspension test in vitro according to the reference document “Guidelines for investigating and evaluating the virucidal activity of disinfectants” MU 3.52431-08 (approved on Dec. 13, 2008 by Service for Consumer Rights Protection and Human Health Control of the Russian Federation) at a concentration of biocide in an aqueous solution from 0.01 to 0.1 mass % and time of exposure from 30 to 60 min. The activity specified in the above document was estimated by the degree of inhibition of infectious virus titre measured as lg TCID50 (TCID50—50% tissue cytopathic infectious dose) which should not be less than 4 for a disinfectant. Test results for salts obtained as described in these and subsequent examples are given in Table 2.
Virucidal activity of copper acrylate-propionate obtained as described in example 4 was investigated by analogy with examples 14-19.
Virucidal activity of zinc methacrylate-myristate obtained as described in example 11 was investigated by analogy with examples 14-19.
For comparison, virucidal activity of known biocide—zinc methacrylate-acetate (ZMA) against HIV was investigated by analogy with examples 14-19.
Virucidal activity of zinc methacrylate-butyrate obtained as described in example 2 against influenza A virus was investigated by analogy with examples 16-19 at a concentration of biocide in an aqueous solution from 0.05 to 0.1 mass %.
Virucidal activity of zinc acrylate-crotonate obtained as described in example 1 was investigated by analogy with examples 38-41.
Virucidal activity of copper methacrylate-sorbate obtained as described in example 6 was investigated by analogy with examples 38-41.
For comparison, virucidal activity of known biocide—zinc methacrylate-acetate (ZMA) against influenza A virus was investigated by analogy with example 41 at a concentration of biocide in an aqueous solution of 0.1 mass % and time of exposure of 60 min.
As it follows from Table 2, the claimed compounds meet the criterion specified in the reference document for disinfectants in respect of two investigated test viruses while their closest structural analogue—ZMA—does not substantially exhibit virucidal activity against these viruses.
Bactericidal activity of zinc acrylate-crotonate obtained as described in Example 1, copper acrylate-stearate obtained as described in Example 10 and copper methacrylate-sorbate obtained as described in Example 6 is determined according to the known method (RU 2378363, C12N 1/00, C12Q 1/00, 2010) based on the exposure of a bacterial culture in a solution of bactericidal substance for a certain period of time followed by its neutralization and inoculation of the culture on a solid nutrient medium. The sensitivity of microorganisms to a disinfectant is estimated by microorganism growth on the nutrient medium up to 300 CFU/ml (CFU—colony-forming unit) wherein growth up to 100 CFU/ml indicates incomplete bactericidal effect, growth up to 100-300 CFU/ml indicates sub-bactericidal effect and growth up to more than 300 CFU/ml indicates resistance of microorganisms to a disinfectant. The determination is performed on E. coli No. 906 and S. aureus No. 1257 test strains conventionally used to study the bactericidal activity of biocides as well as on clinical strain P. aeruginosa at salt concentrations from 2 to 4% and time of exposure from 5 to 60 min. Test results are given in Table 3. It follows from Table 3 that zinc acrylate-crotonate and copper methacrylate-sorbate at concentration of 4.0% exhibit sustained bactericidal effect against all investigated strains at time of exposure from 15 min. Copper acrylate-stearate shows sustained bactericidal effect against two first strains at concentration of 2.0% and time of exposure of 60 min. as well as at concentration of 4.0% and time of exposure from 5 min. while its bactericidal effect against the third strain is exhibited at concentration of 4.0% and time of exposure of more than 30 min.
The fungicidal activity of the proposed salts is determined according to GOST 30028.4-2006 by testing samples of various materials treated with these salts for resistance to fungal spores. Test results in terms of tolerance time (in days) are given in Table 4 wherein tolerance time for untreated materials are given for comparison.
The present invention can be used for production of biocides intended for combating pathogenic microorganisms, for example, for incorporation into disinfecting and antiseptic compositions, polymer materials, for treatment of wood, paper, building structures and other materials to prevent their damage caused by biological matters (microorganisms, fungi, algae), manufacture of various articles with biocidal properties, etc.
E. coli
S. aureus
E. coli
S. aureus
E. coli
S. aureus
P. aeruginosa
P. aeruginosa
| Number | Date | Country | Kind |
|---|---|---|---|
| 2014137615 | Sep 2014 | RU | national |
This Application is a Continuation application of International Application PCT/RU2015/000564, filed on Sep. 7, 2015, which in turn claims priority to Russian Patent Application RU 2014137615, filed Sep. 16, 2014, all of which are incorporated herein by reference in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/RU2015/000564 | Sep 2015 | US |
| Child | 15459693 | US |
