Method for preparing pentaerythritol triacrylate

Abstract

The invention belongs to a method for preparing pentaerythritol trimethylacrylate, comprising the steps as follows: (1) pentaerythritol, acrylic acid, catalyst, solvent and polymerization inhibitor are put into a reaction kettle to be fully mixed and stirred so as to form a miscible liquid; (2) a steam valve of the reaction kettle is opened to slowly heat the miscible liquid, and the temperature is controlled and maintained at 70-90 DEG C for a 20-40min reaction; (3) the mixture is continued to be heated, when the temperature is increased to 80-115 DEG C, reflow is carried out for 3-5h and then the reaction is finished; (4) soda water solution and sodium chloride water solution are added into the mixture and after washing the upper organic phase is extracted; (5) the upper organic phase is separated from the solvent; (6) and filter pressing is carried out to obtain the end product. The method has simple process, good quality, activity and flexibility, low shrinking percentage and color intensity and high yield coefficient, and produces few by-products or little waste water.

Description

technical field

[0001] The invention belongs to the field of diluents, in particular to a preparation method of pentaerythritol triacrylate. Background technique

[0002] Pentaerythritol triacrylate (PETA) is an important acrylic acid trifunctional ester monomer, its molecular weight is 298, and its appearance is colorless or light yellow liquid. The characteristics of this product are high cross-linking density, fast curing and good flexibility. , low volatility, scratch resistance, fire resistance, chemical resistance, mainly used in many fields such as coatings, adhesives, electronics and composite materials. The industrial synthetic pentaerythritol triacrylate mainly uses concentrated sulfuric acid as catalyzer at present, is prepared through esterification reaction by acrylic acid and pentaerythritol, and the product that this technique obtains has following defects: 1. poor product quality, chromaticity, acidity and viscosity are higher , and easily turbid; 2. The act...