A solution stabilization aid, a composition solution containing isothiazolinone that can be directly diluted and used, and its application

Abstract

The invention discloses a solution stabilization additive, an isothiazolinone-containing composition solution capable of being used by direct dilution and application thereof. The isothiazolinone-containing composition solution capable of being used by direct dilution comprises 0.5 to 20% by weight of an isothiazolone derivative, 5 to 15% by weight of the solution stabilization additive and the balance of a solvent, wherein the isothiazolone derivative is a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, and the solution stabilization additive comprises 2-bromo-2-nitro 1, 3-propylene glycol, a magnesium salt and at least one substance selected from the group consisting of poly epoxy succinate sodium, sodium diacetate, sodium glycinate, sodium tartrate and sodium malate. The isothiazolinone-containing composition solution contains no formaldehyde, methanol and copper ions, is environment friendly, and completely avoids the corrosion of the copper ions on system equipment; the isothiazolinone-containing composition solution as a bactericide is rapid in bactericidal rate, strong in antibacterial ability, long in effect time and better in stability, can be used by direct dilution, and is convenient for users to use and lower in cost.

Description

technical field [0001] The invention relates to a solution stabilization aid, a composition solution containing isothiazolinone and application thereof. Background technique [0002] The use of isothiazolin-3-one can control the growth of microorganisms in industrial environments (metal fluids, cooling water in cooling towers, emulsions, plastic films, etc.), and the addition of system stabilizers enables isothiazolin-3-ones to obtain long-term bactericidal activity. Although formaldehyde or formaldehyde-releasing chemicals are common system stabilizers, they are best avoided due to their volatility, high-temperature degradation, relatively high cost, difficult handling, and potential toxicity. Typical system stabilizers include nitrates, for example, isothiazolinone derivatives - CMIT / MIT mixture is used as a bactericide and algicide for industrial circulating cooling water, the commercial concentration is 1.5%, and usually 2 to 4‰ should be added to the formula Copper ni...

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Problems solved by technology

[0003] US3,870,795 and US4,067,878 describe the addition of metal nitrite or nitrate salts to stabilize isothiazolinones against chemical degradation, but other common metal salts, including carbonates, sulfates, chlorates, Chlorates and chlorides are not as effective in stabilizing isothiazolinone solutions as metal nitrite or nitrate

The problem of using copper salt as a stabilizer is that (1) copper has potential corrosion problems, which will lead to electrochemical corrosion of the metal heat exchanger of the system; (3) When used in printing and dyeing and dyeing and finishing processes, defects will occur; (4) When used in water-based paints, "salt clusters" will occur, resulting in unqualified production; (5) Copper ions are heavy metals, which are discharged into the environment will cause pollution

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