1,2 pentadiol has excellent moisturizing properties, antibacterial and solubilizing

1,2 pentadiol, the main role in cosmetics is humectant, antibacterial agent, solubilizer, emollient.

1, 2-pentanediol, chemical formula C5H12O2, is a diol with refreshing and excellent antibacterial properties, and alkanediol, a polyol with high antibacterial properties. It is an important intermediate of bactericide propiconazole and a key raw material for the synthesis of bactericide propiconazole.
1,2 pentadiol is a multi-functional, high stability, widely used in cosmetics raw material ingredients, the main role in cosmetics is moisturizer, antibacterial agent, solvent, emollient, used in skin care lotion, skin care cream, eye cream, moisturizer, shampoo and other products, but also the production of polyester fiber, surfactants, medicine and other important raw materials. It has no odor, high safety and good skin feeling, especially suitable for sensitive skin.

Moisturizing:

1,2 pentadiol is an excellent humectant with very high moisture absorption and water retention, so it is commonly used as a humectant in cosmetics.

Because pentadiol has a certain hygroscopic property, it can absorb moisture in the air, thus playing a moisturizing effect. The use of skin care products containing 1,2 pentanediol can reduce skin water loss, increase skin water content, improve dry skin (especially suitable for dry or sensitive skin), relieve skin peeling, peeling, and improve the water resistance of sunscreen products.

Antibacterial:

1,2 pentanediol has strong antibacterial activity and can effectively inhibit Gram-negative bacteria, positive bacteria, yeast and mold.
1,2 pentodiol has strong antibacterial activity, and the MIC concentration of 1,2 pentodiol is significantly lower than that of other kinds of alcohol by AGAR dilution test, and the minimum inhibitory concentration (MIC) is the lowest concentration of antibacterial ingredients to inhibit microbial growth.

1, 2-pentanediol can be added to the bactericide propionazole, which can be applied to the skin after being made into a cream, which can play a certain antibacterial effect and help to inhibit the growth of pathogenic bacteria.

The formulation of 1, 2-pentanediol is highly flexible and is not affected by hydrolysis, temperature and pH, and is widely used in no-wash and rinse products. It plays an antibacterial role in the “preservative-free” claimed products and has a synergistic effect with traditional preservatives. While reducing the amount of preservatives, strengthen the performance of the anti-corrosion system and effectively reduce the irritation of the product. As a synergist for the anti-corrosion system, it is recommended to add 0.8~4.0%.

In addition to the above two core functions and effects of moisturizing and antibacterial, 1,2 pentanediol also has the ability to improve the protection of products, such as the protection of emulsifiers, the protection of high SPF sunscreen milk, the protection of hydrogels and other products; Achieve excellent skin feel: good compatibility with the skin, moisturizing, lightweight, providing a velvety touch; Dispersion powder: improve the overall color of the foundation gloss and uniformity; Reduce surface tension: help emulsification, improve the appearance of the formula; The particle size of droplets in the emulsion: the particle size distribution of droplets in the emulsion has a very important influence on the stability of the emulsion. 1,2 pentanediol can enhance the stability of the emulsion and increase the aesthetics of the formula. Improve the efficacy of active substance.

In particular, 1, 2-pentanediol is mild and non-irritating, a star ingredient of the Green Revolution that has been used safely for decades; In addition, the compatibility of 1, 2-pentanediol is very good, can be added to the oil phase, can improve the water resistance of the sunscreen product formula; Soluble in water, easily dissolved in ethylene glycol, propylene glycol, glycerol and other polyols.

Preparation and production of 02, 2-pentanediol

By product category, 1, 2-pentanediol industry can be subdivided into cosmetic grade, industrial grade; Classified by end-use applications, 1, 2-pentanediol can be used in pharmaceuticals, cosmetics, and other fields.

1, 2-pentanediol is an important organic chemical raw material, widely used in medicine, cosmetics, pesticides, fragrances, dyes, plastics and lubricants. 1, 2-pentanediol can be obtained by a variety of synthetic methods, the following are three common ways to make 1, 2-pentanediol:

1, aldehyde condensation method

Aldoacetal process is a common method for the manufacture of 1, 2-pentanediol. The method takes acetaldehyde and acetone as raw materials, and under the action of acid catalyst, aldol condensation reaction occurs to produce 3-hydroxy-2-butanone. Then, 3-hydroxy-2-butanone is reduced to 1, 2-pentanediol by hydrogenation reduction reaction.

2, acetylenic aldehyde method Acetylenic aldehyde method

It is a method of synthesizing 1, 2-pentanediol by acetylenic aldehyde compound. The method takes acetylene and formaldehyde as raw materials, under the action of basic catalyst, acetylene aldehyde addition reaction occurs to produce 1, 4-butynediol. Then, 1, 4-butynediol is reduced to 1, 2-pentadiol by hydrogenation reduction.

3, dimethyl carbonate method

The dimethyl carbonate process is a method to synthesize 1, 2-pentanediol from dimethyl carbonate. Using dimethyl carbonate and ethylene as raw materials, transesterification reaction occurs under the action of catalyst to produce 1, 2-propylene glycol and methanol. Then, 1, 2-propylene glycol is added to hydrogen and carbon dioxide to form 1, 2-pentanediol.

The above only provides three common methods for the manufacture of 1, 2-pentanediol, and the specific production process needs to be selected and optimized according to the actual situation.