Polychloroethylene heat stabilizer having dioctyl tin maleate structure and preparation thereof

Abstract

The invention relates to polyvinyl chloride thermal stabilizer containing dioctyltin maleate structure and a method for making the same. The polyvinyl chloride thermal stabilizer comprises the terpolymer as shown in the following structural formula, wherein x:y:z (molar ratio) is equal to (1-2):(3-15):(0.1-1); and M is N-phenyl maleimide, p-chlorophenyl maleimide and N-p-nitrophenyl maleimide. The method is as follows: nitrogen is injected into a reactor provided with a stirring reflux device; then, dioctyltin maleate, phenethylene and N-phenyl maleimide monomer are added in the reactor and are stirred till the mixture becomes a transparent solution; then, initiator is added to carry out nitrogen protection; polyreaction is carried out at a temperature of between 50 and 90 DEG C for 3 to 12 hours; finally, the reaction is stopped, and the reaction liquid is injected into methanol solvent so as to obtain polyvinyl chloride thermal stabilizer product after deposition. The polyvinyl chloride thermal stabilizer has the advantages of high thermostabilization efficiency, low cost, non toxicity and environmental protection.

Description

technical field The invention relates to a polyvinyl chloride heat stabilizer, in particular to a polyvinyl chloride heat stabilizer containing a dioctyltin maleate structure and a preparation method thereof. Background technique Polyvinyl chloride (PVC) is widely used in insulating materials, building materials and daily-use plastic products because of its low price and excellent performance. In recent years, my country's total demand for PVC is still showing a stable double-digit growth trend. However, due to structural defects in the PVC molecular chain, hydrogen chloride will be released when heated to 110°C, and the released hydrogen chloride will accelerate the decomposition of PVC. Therefore, PVC will be significantly degraded when the processing temperature is 160-200°C, causing product discoloration and product mechanical properties, etc. The decline will affect the service life. In order to prevent PVC from degrading during processing, heat stabilizers need to be...

AI Technical Summary

Problems solved by technology

Aiming at the problems existing in the PVC heat stabilizer in the prior art, the present invention provides a polymer polyvinyl chloride heat stabilizer and a preparation method thereof, aiming at solving the following technical problems: increasing the compatibility between the heat stabilizer and PVC , so that the heat stabilizer can be uniformly dispersed in PVC, improve the heat stabilization performance; reduce the volatilization phenomenon of the heat stabilizer when used, and improve the utilization rate of the heat stabilizer

Images