US5880310A - Process for producing plasticizer esters
Provided is a process for producing a plasticizer ester characterized by previously removing dissolved oxygen in a starting alcohol, and then subjecting an organic acid or its anhydride and the alcohol to an esterification reaction in the presence of an organic metal compound catalyst, which process can substantially reduce formation of coloring impurities and can easily provide a plasticizer
Ester Content - an overview | ScienceDirect Topics
Purity of monomeric plasticizers can be determined with a high precision using gas chromatography.59 Flame ionization or thermal conductivity detectors are used. Capillary or packed columns which can withstand temperatures in the range of 250 to 350 °C are used if they provide adequate separation of components.
DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF PLASTICIZERS ON
Pentaerythritol esters (2,2-bis(hydroxymethyl)propane-1,3-diol) esters and other esters are widely used as components of machine oils, motor oils, hydraulic fluids and plasticizers. The advantages
Esterification process for producing purified plasticizer esters
Branched chain alkyl organic esters and particularly alkyl phthalic acid esters and more particularly octyl and decyl phthalate, as well as the esters of maleic acid, adipic acid, azelaic acid, sebacic acid or their anhydrides, have been known to be extremely satisfactory plasticizers for the aforementioned high molecular weight materials.
Elucidating the characteristics of a promising nitrate ester
Recently, polysaccharides have attracted tremendous interest as potential candidates to develop promising high-energy dense polymers through the chemical functionalization of their structures. Therefore, chitosan nitrate (CSN), as an energetic polysaccharide was fabricated by nitration of chitosan (CS) derived from shrimp Parapenaeus longirostris shells. The physicochemical, structural, and
- Can adipic acid ester be used as a PVC plasticizer?
- The purpose of this work is the synthesis of adipic acid ester and the study of the possibility of its use as a PVC plasticizer. The resulting butyl phenoxyethyl adipate was characterized by Fourier-transform infrared spectrometry, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).
- What are plasticizers based on?
- Plasticizers based on other acids are known and used [ 41 ], for example, citrates [ 42 ], but the cost of their production is much higher [ 43 ]. Esters of succinic acid are a renewable resource, which makes them an attractive promising starting material for industrial production [ 44 ].
- Which plasticizer is used in conjunction with low-molecular-weight plasticizer?
- As a rule, they are used in conjunction with small amounts of low-molecular-weight plasticizer. Known plasticizer based on castor oil, which is gradually hydrogenated, esterified and acetylated to obtain triacetylated monoglyceride ester.
- 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.
- Why is the introduction of a plasticizer important?
- The introduction of a plasticizer into a polymer composition is important from a practical and theoretical point of view. Lowering the glass-transition temperature of the polymer with the introduction of a plasticizer makes it possible to expand the temperature range of its highly elastic state, that is, to increase its frost resistance.
