6 Features of CMIT/MIT isothiazolinone preservative

2021-10-30   Pageview:669

1, Non-toxic, broad-spectrum antibacterial and sterilization, long lasting effect.
2, Good compatibility with various emulsifiers and surfactants, with excellent compatibility performance.
3, Does not change the smell and color of cosmetics and topical drugs.
4, It is not limited by temperature, below 80℃ is good, below 100℃ efficiency is more than 90%.
5, Safe and convenient, stable performance, low addition amount, applicable in the range of PH value 3-8.
6, Low price, its price is much lower than similar products at home and abroad.












The generation of ozone in the atmosphere is also common. Lightning, smog, photochemical reactions, and atmospheric nitrogen and sulfur oxides may generate ozone through photosensitization or chemical reactions. NO2 in the atmosphere absorbs light energy below 430nm, and after a series of reactions, it can produce sasol ft wax ozone and singlet oxygen [9.10], the reaction formula is as follows:

SOz in the atmosphere can also photosensitize triplet oxygen to produce singlet oxygen. 11 Triplet oxygen molecules mainly have a high binding ability to free radicals. During the degradation of polymers, they combine with carbon-centered free radicals to form peroxygen free radicals. The singlet oxygen has significant addition-oxidation activity to the unsaturated structure in the polymer, and the oxidation activity of ozone is stronger, which can directly oxidize the saturated bonds such as CH in the polymer [ia. The basic reaction formula is as follows (P represents the polymer chain, H is a hydrogen atom) [11; if there are electron-withdrawing groups in the ortho position of the polymer C-II bond, such as spot and star-keeping correction, these C-H bonds Lively, more prone to photo-oxidation reaction. Even without considering the specific functional structure of the polymer, the photooxidation of the polymer is very complicated. Hydroxyl radicals, NO 2, SOg, etc. may participate in the free radical process of polymerization photodegradation. Among the polymer light stabilizers, there is a quencher specifically for singlet oxygen to inhibit its damage to the polymer; phosphites, tertiary amines, thioethers, etc. can be used as complex decomposers for ozone. There have been many descriptions on the photooxidation characteristics of plastic and rubber polymer materials, which have some similarities with coating polymer materials.


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