How to use CMIT/MIT isothiazolinone preservative

2021-10-30   Pageview:161

The product is a liquid, add it directly to the material under the temperature of 80℃ and stir it well.

1, The dosage of common daily cosmetic is 0.2-0.3‰

2, The dosage of cosmetics is 0.3-0.5‰

3, The dosage of detergent products is 0.5-1.0‰

If you need sterilization and antibacterial effect at the same time, the dosage will be increased or decreased according to the above dosage after doubling the small test.

 

 

 

 

 

 

 

 

 

 

 

 

The photo-curable resins of different structures can vary greatly in their anti-light aging properties. If the cured coating structure contains aromatic rings, especially the aromatic ring, there are oxygen atoms or nitrogen atoms and other groups that can form a conjugate structure with the aromatic ring. When closed, the photo-aging yellowing tends to be greater, and the formula structure produced during the photo-oxidation process is the key to its easy aging yellowing. This has been confirmed by many studies [14~1].

The difference in light aging performance can be shown in Figure 14-2 [Gate, comparison of light aging yellowing of a typical light curing resin Q UV aging conditions: 40℃, RH 100%: film thickness: sasol pe wax aromatic resin 25pm, aliphatic resin 200gm bisphenol A ring Oxyacrylate cross-linking system: The cross-linking network mainly contains polyacrylate cross-linking structure and aromatic ring structure substituted by electron-donating groups. Among them, a large number of ester carbonyl groups on the polyacrylate chain can absorb short-wave ultraviolet light or photosensitive Under the action of chemical reaction, the ester group may undergo at least two forms of cleavage, that is, the cleavage of the CC bond and the CO bond. The formed free radicals are susceptible to attack by oxygen, further oxidative decomposition occurs, and carbon dioxide is released at the same time. This aging process is not necessarily accompanied by a significant increase in the yellowness index. The photolysis of the bisphenol A chain unit unit produces a dark ester structure and other cracking and oxidation products, resulting in a significant increase in the yellowness of the cured film. The photodegradation chemical process of bisphenol A epoxy acrylate curing system.

Because the bisphenol A epoxy has an aryl alkyl ether structure, the cross-linking system may undergo Fries rearrangement while the above-mentioned photodegradation occurs. Alkoxybenzene ring structure makes the photo-aging yellowing aggravated.

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