Process for compounding epoxy linseed oil and citric acid to obtain plasticizer

Abstract

The invention discloses a process for compounding epoxy linseed oil and citric acid to obtain a plasticizer, and the process is as follows: adding citric acid, n-butyl alcohol and sulfuric acid into a four-mouth bottle, stirring at 130 to 150 DEG C for 4-7h, and dealcoholizing to obtain tributyl citrate; adding linseed oil, petroleum ether and formic acid into a three-mouth bottle, stirring at 60 to 70 DEG C at the speed of 300-500r / min, adding dropwise a mixed solution of hydrogen peroxide and a catalyst, after reaction for 3 to 4 hours, stopping stirring, and adding a sodium hydroxide solution and acetic acid; mixing obtained substances, heating in the presence of an acid catalyst to 110-150 DEG C, using a water separator for reflux esterification, cooling to 50-60 DEG C, then adding acetic anhydride for acetylation at 100-125 DEG C for 2-3h for complete reaction, and evaporating in vacuum to remove by-product acetic acid; and finally, neutralizing, washing with water and drying. The plasticizer has ether bonds, compared with a traditional citric acid ester plasticizer, the plasticizer has the advantages of better compatibility and less precipitation, and by the combination of the epoxy linseed oil and a citric acid ester compound plasticizer, better performances can be achieved.

Description

technical field [0001] The invention relates to a plasticizer, in particular to a composite plasticizer. Background technique [0002] With the rapid development of the plastics industry and the textile printing and dyeing industry, the amount of plasticizers has increased significantly. Now the more commonly used plasticizers in the market are phthalates. In recent years, people have paid attention to health and carried out research on traditional phthalate plasticizers, and found that phthalates increase Plastics can pollute air, water, soil, and even food, and degrade very slowly in the environment, so they have become global environmental pollutants that have attracted much attention. In addition, in daily life, people are in direct contact with plastic products, and phthalate plasticizers will enter the human body through various channels and cause different degrees of harm. Epoxy plasticizer is a new type of non-toxic plasticizer that has been successfully developed ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that citric acid ester plasticizers are easy to separate out and have large migration. Issues where the scope of use is limited, which affects performance