"Descrizione" by admin (19344 pt) | 2023-Sep-21 19:34 |
Polyurethane-61 is an inorganic chemical compound, a segmented block copolymer derived from urethane and synthesised from isocyanates.
The name describes the structure of the molecule:
Significant substances used in the production method:
methylene diphenyldiisocyanate (SMDI), dimethyl aminopropylamine (DMAPA), isopropylidenediphenoxypropanol, isophthalic acid/1,6-hexanediol/adipic acid, water, triethylamine, ethylenediamine.
Description of raw materials used in production with their functions.
Step-by-step summary of industrial chemical synthesis process.
What it is used for and where
Cosmetics
Nail Conditioning agent. It is an agent that creates protection against harmful or chemical substances by strengthening the nail structure against external elements and can repair any chipping, cracking or brittle nails. It helps keep the nail's outer layer and keratin protein in good condition. It can also prevent cracking and peeling of the nail.
It appears as a white powder or colorless liquid.
Safety
Urethane (also called ethyl carbamate) is a by-product of fermentation and is considered a genotoxic agent.
Polyurethanes are rather complex, inert and biostable materials that are also used in biomedical applications. They are typically synthesised by the reaction of a glycol or polyol with polyisocyanate or diisocyanate. It is known that exposure to isocyanates can cause asthma, contact allergies, conjunctival and skin irritation. However, a study by the Cosmetic Ingredient Review Expert Panel in 2017 found that the rates of harmful residues are not significant for human health. (Solvent: Water, approximately 0.0075% MI and benzisothiazolinone as preservatives, and approximately 1.3% (by weight) dimethylethanolamine as a neutralizing agent)
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