13results about "Esters preparation by oligomerisation" patented technology

The present invention relates to bis-aminophosphines which are useful as catalysts for the dimerization of alkyl acrylates. Furthermore, the present invention relates to a process for preparing bis-aminophophines, the use of these bis-aminophosphines as catalysts for dimerization reaction of alkyl acrylates and a process for obtaining dimers of alkyl acrylates using bis-aminophosphines as catalyst.

The present disclosure relates to a system (100) assembled for carrying out oligomerization of α-hydroxy acids comprising: a reaction vessel (101), distillation column (102), an inlet valve (103), reflux divider (104), condenser (105) a vessel (108) containing α-hydroxy acids for feeding, peristaltic pump (109), stirring means (110) for stirring the reaction vessel (101), heating means (111) for heating the reaction vessel (101), means (112) to measure temperature of the reaction vessel (101), and means (113) for heating, adjusting, regulating or maintaining temperature of the distillation column (102), characterized in that, the α-hydroxy acids are fed portion-wise to the reaction vessel (101) via the inlet valve (103) positioned close to the distal end of the distillation column (102) in a controlled mode; such that oligomers of MW ranging from 900-1200 Da are synthesized / obtained within 5 hours, with less than 2% of α-hydroxy acids in the distillate collector (107).

The present disclosure relates to an assembly of a system 100 for carrying out oligomerization of alpha-hydroxy acids, comprising a reaction vessel 101, a distillation column 102, an inlet valve 103, a fractionating head 104, a condenser 105, a vessel 108 for feeding an alpha-hydroxy acid, a peristaltic pump 109, a stirring device 110 for stirring the reaction vessel 101, a heating device 111 for heating the reaction vessel 101, a device 112 for measuring the temperature of the reaction vessel 101, and a device 113 for heating, adjusting, regulating or maintaining the temperature of the distillation column 102, the method is characterized in that the alpha-hydroxy acid is fed in batches into the reaction vessel 101 in a controlled mode via an inlet valve 103 located near the distal end of the distillation column 102 so as to synthesize / obtain an oligomer having a molecular weight in the range of 900 Da to 1200 Da within 5 hours, the alpha-hydroxy acid being less than 2% in the distillate collector 107.

The invention relates to a method for producing alkyl acrylate dimers. The invention further relates to a method for producing hydrogenated alkyl acrylate dimers obtained by the dimerization method according to the invention. The invention further relates to a method for producing hydrolyzed alkyl acrylate dimers obtained by the dimerization method according to the invention.

The present invention relates to bis-aminophosphines useful as catalysts for the dimerization of alkyl acrylates. The present invention further relates to a process for preparing the bis-aminophophines, the use of these bis-aminophosphines as catalysts for the dimerization reaction of alkyl acrylates, and a process for obtaining dimers of alkyl acrylates using bis-aminophosphines as catalysts.

The present invention relates to a process for producing an alkyl acrylate dimer. Furthermore, the present invention relates to a process for producing a hydrogenated alkyl acrylate dimer obtained by the dimerization process according to the present invention. Moreover, the present invention relates to a process of producing a hydrolyzed alkyl acrylate dimer obtained by the dimerization process according to the present invention.

This invention relates to a method for producing alkyl acrylate dimers. Furthermore, this invention relates to a method for producing hydrogenated alkyl acrylate dimers obtained by the dimerization process according to the present invention. In addition, this invention relates to a method for producing hydrolyzed alkyl acrylate dimers obtained by the dimerization process according to the present invention.

The present invention relates to a process for preparing alkyl acrylate dimers.Furthermore, the present invention relates to a process for preparing hydrogenated alkyl acrylate dimers obtained by the dimerization process according to the present invention.In addition, the present invention relates to a process for preparing hydrolyzed alkyl acrylate dimers obtained by the dimerization process according to the present invention.

The present invention relates to bis-aminophosphines which are useful as catalysts for the dimerization of alkyl acrylates. Furthermore, the present invention relates to a process for preparing bis-aminophophines, the use of these bis-aminophosphines as catalysts for dimerization reaction of alkyl acrylates and a process for obtaining dimers of alkyl acrylates using bis-aminophosphines as catalyst.

Provided in the present disclosure are fluorocarbon-modified ethyoxylated bisphenol A diacrylate and a preparation method therefor, and a resin composition comprising same and the use thereof. In the present disclosure, modified ethyoxylated bisphenol A diacrylate containing a fluorocarbon chain segment is obtained by grafting an organic group containing at least three fluorine atoms to ethyoxylated bisphenol A diacrylate; and when used in a resin composition, the modified ethyoxylated bisphenol A diacrylate containing a fluorocarbon chain segment can reduce the viscosity of the resin composition and improve the efficiency of the permeation of a resin into a porous framework, thereby enabling the resin composition to have wide application prospects.

The present invention relates to bis-aminophosphines which are useful as catalysts for the dimerization of alkyl acrylates. Furthermore, the present invention relates to a process for preparing bis-aminophophines, the use of these bis-aminophosphines as catalysts for dimerization reaction of alkyl acrylates and a process for obtaining dimers of alkyl acrylates using bis-aminophosphines as catalyst.

The present invention relates to a process for producing an alkyl acrylate dimer. Furthermore, the present invention relates to a process for producing a hydrogenated alkyl acrylate dimer obtained by the dimerization process according to the present invention. Moreover, the present invention relates to a process of producing a hydrolyzed alkyl acrylate dimer obtained by the dimerization process according to the present invention.