Polyurethane-69 is an inorganic chemical compound, a segmented block copolymer derived from urethane and synthesised from isocyanates.
The name describes the structure of the molecule:
- "Polyurethane" is a term that describes a class of polymers widely used in various applications due to their versatility and desirable properties such as durability, flexibility and abrasion resistance and temperature variations.
- "-69" is a reference to the specific type or grade of polyurethane, which can be characterized by such factors as the types of isocyanates and polyols used, their relative amounts, and the presence of any additives. . This is a designation used to differentiate different molecular structures or variants of the polymer. In cosmetic chemistry, these numbers can help formulators identify specific characteristics or behaviors of a given ingredient, particularly when a chemical family has multiple derivatives or forms.
Significant substances used in the production method:
bisoxyhydroxypropyl Methacrylate , Isophorone Diisocyanate (IPDI), and Di-C12-13 Alkyl Tartrate, hydroxyethyl methacrylate (HEMA).
Description of raw materials used in production with their functions.
- Bisoxyhydroxypropyl Methacrylate. A methacrylate ester used as a reactive monomer that provides UV reactivity and allows for polymerization.
- Isophorone Diisocyanate. A diisocyanate used to form urethane bonds, adding to the mechanical and thermal properties of the polyurethane.
- Di-C12-13 Alkyl Tartrate. An ester that acts as a flexibilizing and plasticizing agent in the polyurethane.
- Hydroxyethyl Methacrylate (HEMA). A hydrophilic monomer that enhances water resistance and adhesion of the polymer.
Step-by-step summary of industrial chemical synthesis process.
- Bisoxyhydroxypropyl Methacrylate is reacted with Isophorone Diisocyanate to form a prepolymer.
- Di-C12-13 Alkyl Tartrate is then introduced into the mixture, followed by HEMA.
- The reaction continues until the desired polyurethane forms.
What it is used for and where
Cosmetics
Skin conditioning agent. It is the mainstay of topical skin treatment by restoring, increasing or improving skin tolerance to external factors, including melanocyte tolerance. The most important function of the conditioning agent is to prevent skin dehydration, but the subject is rather complex and involves emollients and humectants.
CAS: 1668562-30-8
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.
