1.3 Propylene glycol 1, 3-PDO bio-based glycerol method

1, 3-propanediol, 1, 3-pdo
Chinese name :1, 3-propanediol, 1, 3-dihydroxypropane, 1, 3-propanediol
Moisturizing and solvent for organic polyols to replace propylene glycol and butanediol. The moisture retention is higher than 1.2 propylene glycol and 1,3 butanediol. No viscosity, no burning sensation, no sensitive irritation; A colorless, odorless, salty, hygroscopic viscous liquid. It is a raw material for the production of unsaturated polyester, plasticizer, surfactant, emulsifier and demulsifier. In the polyurethane industry, it is commonly used as the raw material of polyester polyol, the initiator of polyether polyol and the chain extender of polyurethane. In the organic chemical industry, it is also an important monomer and intermediate, the most important use is as a polymer monomer.

Product details
1, 3-propylene glycol (1,3-PDO) is a colorless, odorless, salty, hygroscopic viscous liquid. It is the raw material for the production of unsaturated polyesters, plasticizers, surfactants, emulsifiers and demulsifiers. In the polyurethane industry, it is commonly used as the raw material of polyester polyols, the initiator of polyether polyols and polyurethane chain extender, etc., the most important use of 1,3-PDO is as a polymer monomer, and terephthalic acid (PTA) to synthesize PTT(polyethylene terephthalate propylene glycol ester) fiber.
Market demand is expected: 5 million tons of PTT fiber, 2 million tons of 1, 3-propylene glycol
The surface morphology and structure of PTT fiber are similar to that of polyester, and the helical spry-like arrangement formed by its 3 methylene chain segments produces “odd carbon effect” gives PTT good internal resilience, so PTT fiber is commonly known as “elastic polyester”.
Compared with PET, PBT, PA6, PTT fiber has excellent tensile resilience, and its elastic recovery rate is significantly higher than PBT and PET. Experiments show that PTT fiber can recover completely even after repeated 20% stretch; Moreover, due to the characteristics of PTT macromolecular conformation and polymer chain lattice conformation, its fiber elongation at break (48%) is second only to spandex.
1, 3-propanediol (1, 3-propanediol, PDO) is mainly used to produce new polyester polypropylene terephthalate (PTT). PTT not only has the chemical stability of polyethylene terephthalate (PChemicalbookET), but also has good resilience and anti-pollution, so it has a good application in the field of textiles is a prospect. The application of 1,3-PDO can also be used as antifreeze, emulsifier and other fine chemical raw materials. The texture is fresh and mild, the moisture is strong, can increase the antibacterial force of the product, and can be used together with other polyols. Multi-functional raw materials for environmental protection.
Performance description: Diols, mainly used as solvents. Helps cosmetic ingredients (such as salicylic acid) penetrate into the skin. Can increase the stability of the shower gel. Consistency. Foaming degree and foam durability, better moisturizing effect than glycerin, in hair care products can repair damaged hair scales and make hair smoother. To prevent frizzy hair, add 5%. Also used as viscosity control agent.
1, 3-propylene glycol has been successfully applied to liquid laundry cleaners, hand sanitizers, automatic dishwasher cleaners, carpet cleaners, hard surface cleaners and glass cleaners formulations. It can be used to replace other diols, such as isopropanediol (1, 2-propanediol) and glycerol. It can be used as an enzyme stabilizer or as an environmentally friendly solvent.
Industrial application
Thermoplastic polyurethane (TPU) sole waterproof film hot melt adhesive
Soft and transparent at low temperatures
The application field of 1,3 propylene glycol is similar to other diols, mainly used as polyester and polyurethane monomer and solvent, antifreeze or protective agent, and is also used in synthetic medicine and as an organic synthesis intermediate. In recent years, studies have shown that polyester (PTT) synthesized with 1,3 propylene glycol as a monomer has better characteristics than polyethylene glycol as a monomer (PET), such as nylon like elastic recovery (can be restored after stretching 20%), in the full color range without the addition of special chemicals can show good continuous printing characteristics, resistance to UV, ozone and nitrogen oxides Colorability, resistance to internal stress, low water adsorption, low static electricity and good biodegradation, can be recycled. These characteristics show that PTT can be used in the production of carpets, short and filament products, for the production of films, nonwovens and monofilaments, and for thermoplastic engineering plastics. PTT will also have the potential to replace PBT and offer higher value to glass filling systems that currently use other polyester feedstocks. Of particular interest is the fact that existing PET plants can be converted to produce PTT products for a small amount of money. With 1,3 propylene glycol as the raw material of the synthesis of the paint, the elasticity and hardness are well linked, a wide range of uses, such as very suitable for use as a snake tube outer coating, can paint and powder spraying, its excellent quality is currently only with quite expensive diols, mainly 1,6 has been diol to achieve. Other potential markets for PDO include thermoplastic polyurethanes (PTUs) and polymer-based plasticizers used for PVC. In fact, as a diol, it can replace intermediates such as 1,4 butanediol and neopentyl glycol. The diol functional group of PDO makes it promising for use in polyurethanes. Examples include the production of polyester polyols and their use as chain growth agents.
In this regard,PDO will compete with ester based polyols such as polycaprolactone diol, poly(ethylene adipate) diol and polyester diol, which are prepared from 1,4 butanediol and adipic acid. The main chain extenders used for TPUs are 1,4 butanediol and bis (22 hydroxyethyl) ethers. ChemSystems says the PDO can compete on a price-performance basis. 1,3 propylene glycol has been used in the field of pharmaceutical synthesis, and some new uses in this field are also being developed. In recent years, more and more attention has been paid to the use of 1,3 propylene glycol as raw material for organic synthesis. For example, 1, 3-propylene glycol can be oxidized by air to synthesize 32 hydroxy-propionic acid and malonic acid, and can react with urea to synthesize cyclic carbonate.
1, 3-propylene glycol is an irreplaceable raw material for the synthesis of PTT polyester. PTT has good dyeability, biodegradability, stain resistance, toughness, resilience and UV resistance of nylon and so on. In addition,PTT fiber wear-resistant, low water absorption, low static electricity and other advantages, can replace nylon in the carpet field, the application field of PTT fiber will mainly be the upgrading of traditional fiber materials (PET, PBT, PA6, PA66). It can also be used to manufacture excellent non-woven fabrics, film engineering plastics, home decoration materials, padding materials and so on. In addition, as an engineering thermal plastic,PTT polyester also has better electrical properties, insulation properties, dimensional stability and the required mechanical properties, can be used in a variety of electronic products production materials.