Esters of anhydrosugar alcohols as plasticizers
The invention consists of esters of anhydrosugar alcohols useful as plasticizers for polymeric compounds. Specifically, esters are formed of bis-anhydrohexitols, such as isosorbide, isomannide and isosiditide, and used as substitutes for the phthalate-based plasticizers in common use.
US20070282042A1 - Esters of anhydrosugar alcohols as
The invention consists of esters of anhydrosugar alcohols useful as plasticizers for polymeric compounds. Specifically, esters are formed of bis-anhydrohexitols, such as isosorbide, isomannide and isosiditide, and used as substitutes for the phthalate-based plasticizers in common use.
Esters of anhydrosugar alcohols as plasticizers - East, Anthony
The invention consists of esters of anhydrosugar alcohols useful as plasticizers for polymeric compounds. Specifically, esters are formed of bis-anhydrohexitols, such as isosorbide, isomannide and isosiditide, and used as substitutes for the phthalate-based plasticizers in common use.
The effects of phthalate ester exposure on human health: A
Abstract. Phthalate esters (PAEs) are one of the most widely used plasticizers in polymer products and humans are increasingly exposed to them. The constant exposure to PAEs-contained products has raised some concerns against human health. Thus, the impacts of PAEs and their metabolites on human health require a comprehensive study for a better
Plasticizers – Benefits, Trends, Health, and Environmental
Plasticizers are colorless and odorless esters, mainly phthalates, that increase the elasticity of a material (e.g., polyvinylchloride (PVC)). Plasticizers soften the PVC to make it flexible and bendable. This opens up a huge range of possibilities for new applications. One of the main benefits of plasticizers is the durability they confer onto
- What is FECL 3-catalyzed esterification of alcohols with phthalic anhydride?
- FeCl 3-catalyzed esterification of alcohols with phthalic anhydride affords phthalate esters, under mild conditions. Phthalates are esters of phthalic anhydride. Phthalic anhydride (1) has been reacted with alcohols 2 to synthesize phthalate monoesters 3 and diesters 4 with the favor of latter compound that primarily used as plasticizers worldwide.
- Can methanol be used in esterification of phthalic anhydride?
- In 2007, Verboom and co-workers have shown the application of supercritical CO 2 in the esterification of phthalic anhydride (1) with methanol (2a) to produce 2- (methoxycarbonyl)benzoic acid (3a) at a high pressure . Monoesters 3 can also be obtained simply by refluxing 1 and 2 in benzene, albeit in poor yield .
- What are phthalate esters used for?
- Phthalate esters are used as plasticizers. Phthalate esters are used to prepare in harsh conditions, at a higher reaction temperature. FeCl 3-catalyzed esterification of alcohols with phthalic anhydride affords phthalate esters, under mild conditions. Phthalates are esters of phthalic anhydride.
- Which catalyst is used in esterification reaction?
- The conventional catalysts used in esterification reaction are H 2 SO 4, HCl, phosphoric acid, etc. which are liquid corrosive acids, and are known to produce color in the product due to the formation of some byproducts , . Therefore, researchers are paying efforts to replace such traditional liquid acid catalysts by solid catalysts.
