Several Bactericides used for cutting fluids

Cutting fluid plays the role of lubrication, rust prevention, cleaning and cooling in the metal cutting process. The environment in which the cutting fluid is used is generally an open system, and it is always faced with the attack of microorganisms (mainly bacteria and molds) in the environment during use.

The chemical method of adding bactericide to the cutting fluid to inhibit the reproduction of microorganisms is simple and efficient. Cutting fluid fungicides should have broad spectrum, stability and low toxicity. The following fungicides are commonly used in cutting fluids. Triazine BK; MBM; IPBC; CIT MIT; IPBC.

(一) CIT/MIT isothiazolinone antifungal fungicide (Isothiazolinone)

Product Name: 5-Chloro-2-methyl-4-isothiazolin-3-one (CIT)/2-methyl-4-isothiazolin-3-one (MIT)

Also known as: Kathon, cmit/mit, WT-14, Kathon, Kathon

CAS No.: 26172-55-4/2682-20-4

Molecular formula: C4H4ClNOS/ C4H5NOS

Molecular weight: 149.5/115

Active ingredients: Isothiazolinone derivatives, the active ingredient is 5-chloro-2-methyl-4-isothiazolin-3-one (CIT); 2-methyl-4-isothiazolin-3-one (MIT).

Specification:

Appearance: light yellow transparent liquid

Active ingredient (w/w): 14%min; 1.5%min;

Chlorine ratio (CIT/MIT, w/w): 2.5-3.5;

Density (20°C): 1.26~1.33g/ml

pH value: 2.0~4.0

Solubility: Miscible with water and low molecular alcohol

Stability: stable at pH 2.0-9.0

Features: Broad-spectrum, long-term killing of a variety of bacteria, fungi and yeast, special effects on Pseudomonas, low dosage.

(二) BK Triazine fungicide

Bactericide BK is a water-based, low-toxicity fungicide developed for water-based products against bacteria and fungi in humid environments, especially in high temperature environments. Its chemical structure is 1,3,5-tris(2-hydroxyethyl)-hexahydro-triazine.

Bactericide BK is a bactericide widely used in metalworking fluids. Can be used in concentrates or for on-site disposal. The dosage in the concentrated solution is 2-3%; the dosage for on-site sterilization is: 0.05-0.15%

(三) 1,2-Benzisothiazolin-3-one (BIT) CAS 2634-33-5

1. Quality indicators:

Appearance: yellow or brown transparent viscous liquid

Active substance content: 20% min

PH value (1% aqueous solution):8-10

2. Application range: suitable for anti-corrosion and anti-mildew of water-based interior and exterior wall coatings, high-end and high-end latex paints, synthetic emulsions, textile auxiliaries, paper-making auxiliaries, metal processing fluids, coated paper coatings, synthetic detergents, thickeners, etc. ; Can also be used in leather chemical and leather industry. This product is stable and effective in acidic to alkaline systems. The active ingredient can withstand high temperature of 300℃ without decomposing. It is suitable for both anion and cation systems.

3. Usage:

When using, put this product directly into the material, fully stir and mix evenly.

Used for material preservation and quality assurance: 0.02-0.10%

Used in the production of special anti-mildew coatings and other occasions that require products to be anti-mildew: 0.5-1.5%

For metalworking fluid stock solution: 0.5-1.5%

For metalworking fluid dilution emulsion: 0.02-0.10%

(四) MBM Fungicide

Product name: N,N'-Methylene-bis-morpholine (MBM)

CAS No.: 5625-90-1

Bactericide MBM is a new generation of broad-spectrum low-toxicity bactericide specially developed for water-based metalworking fluids. Its chemical structure is a morpholine derivative. This product fully meets the requirements of water-based metalworking fluids: it has low skin irritation, mild smell, and low toxicity (its formaldehyde release is only 1/3 of BK, and the concentration in the stock solution is added to 5% without hurting hands), and the formula is compatible Strong, long-lasting bactericidal. At higher concentrations (above 3%), it also has better inhibition of fungi and molds. Bactericide MBM is a kind of bactericide widely used in metalworking fluids. Can be used in concentrates or for on-site disposal. The dosage in the concentrated solution is 2-5%; the dosage of on-site sterilization is: 0.1-0.25%

Biological characteristics: Fungicide MBM is effective against bacteria, fungi and yeasts.

(五) IPBC, CAS 55406-53-6

Product Name: Iodo Propynyl Butyl Carbamate (IPBC)

Chemical name: 3-iodo-2propynyl-N-n-butylcarbamate

CAS No.: 55406-53-6

EINECSNO.: 259-627-5

MF: C8H12INO2

NW: 281.09

IPBC is a fungicidal compound, added to the pigment, which can prevent the color change due to the growth of mold during storage, and improve the shelf life of the pigment. It can be added to the paint for long-term storage, or it can fully and effectively prevent aging and discoloration caused by fungal infection on the coated surface, so as to maintain a long-term decorative effect. Added in water and oil, it can avoid the color of water and oil due to the action of mold. IPBC can also be used to treat wood to prevent mildew. If it is used in leather or other fiber industrial products, it has a good antibacterial and killing effect.

IPBC-Solid has broad-spectrum antibacterial activity, especially strong inhibitory effect on mold, yeast and algae. Solubility: easily soluble in ethanol, propylene glycol and other organic solvents, hardly soluble in water.

Application: Due to its high safety, it is mainly used in cosmetics, daily chemicals, paints, leather, plastics, wood, metal cutting fluid, wood discoloration control, textiles, paper industry, ink, adhesives, etc. This product is a new anti-dandruff antipruritic, bactericidal preservative.

characteristic:

1) This product is one of the most effective fungicides at present.

2) Low toxicity, easy to operate, can be added in any process.

3) It can be used alone or in combination with parabens, Cathone, Bropol, etc. to achieve a perfect antiseptic effect.

Addition amount: 0.05～0.2%.