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Novel preparation method of orotic acid hydrate zinc PVC stabilizer by heterogeneous system

A technology of zinc uracil carboxylate and heterogeneous phase is applied in the preparation of zinc uracil carboxylate in a heterogeneous system in the field of thermal stability of PVC, and achieves the effects of reducing initial coloration, readily available raw materials, and simplifying process flow

Inactive Publication Date: 2017-03-22
SHENZHEN AIMSEA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention describes a heterogeneous system for preparing zinc uracil carboxylate compound as a zinc-containing raw material to improve the thermal stability of PVC, and simplifies the preparation process. This application scheme has not been disclosed in relevant documents

Method used

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  • Novel preparation method of orotic acid hydrate zinc PVC stabilizer by heterogeneous system
  • Novel preparation method of orotic acid hydrate zinc PVC stabilizer by heterogeneous system

Examples

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Effect test

Embodiment 1

[0027] 100 parts of PVC, 50 parts of dioctyl phthalate, 30 parts of calcium carbonate, 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite and 2 parts of calcium stearate, 2 parts The dry mixture composed of zinc uracil carboxylate was rolled on an open mill at 180°C for 5 minutes. Press the tablet, take the piece and cut it into a 2cm×2cm small square sample. According to the requirements of the GB / T 7141-92 standard, put the PVC sheet into groups in order and place them in an aging oven. The oven aging test is carried out at 190±1°C. Take out the test piece every 10 minutes, observe and record the change of chromaticity of the test piece, and record its yellowness index according to ASTM D1925-70, and the results are shown in Table 1.

Embodiment 2

[0029] 100 parts of PVC, 50 parts of dioctyl phthalate, 30 parts of calcium carbonate, 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite and 2 parts of calcium stearate, 2 parts A dry mixture consisting of zinc uracil carboxylate and 0.2 parts of dibenzoylmethane was rolled on an open mill at 180°C for 5 minutes. Press the tablet, take the piece and cut it into a 2cm×2cm small square sample. According to the requirements of the GB / T 7141-92 standard, put the PVC sheet into groups in order and place them in an aging oven. The oven aging test is carried out at 190±1°C. Take out the test piece every 10 minutes, observe and record the change of the chromaticity of the test piece, and continue until the test piece appears black. According to ASTM D1925-70, record its yellowness index. The results are shown in Table 1.

Embodiment 3

[0031] 100 parts of PVC, 50 parts of dioctyl phthalate, 30 parts of calcium carbonate, 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite and 2 parts of calcium stearate, 2 parts A dry mixture composed of zinc uracil carboxylate and 0.2 parts of 1,3-dimethyl-6-aminopyrimidine was rolled on an open mill at 180°C for 5 minutes. Press the tablet, take the piece and cut it into a 2cm×2cm small square sample. According to the requirements of the GB / T 7141-92 standard, put the PVC sheet into groups in order and place them in an aging oven. The oven aging test is carried out at 190±1°C. Take out the test piece every 10 minutes, observe and record the change of the chromaticity of the test piece, and continue until the test piece appears black. According to ASTM D1925-70, record its yellowness index. The results are shown in Table 1.

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Abstract

By the technology of a heterogeneous system, orotic acid hydrate zinc is prepared to enhance stability of PVC. The preparation method comprises the following steps: adding proper amounts of uracil and deionized water into a four-mouth flask, heating and fully stirring, adding proper amounts of ammonia water and a phase-transfer catalyst, letting the phase-transfer catalyst be uniformly dispersed in the solution, and cooling the solution to room temperature; adding zinc pyrrolidone carboxylate and glycerol while stirring, stirring at constant temperature at room temperature for several hours, pouring the reaction solution into lots of ethanol to obtain white precipitate, separating with cold water, and washing and drying. The orotic acid hydrate zinc is used as a PVC heat stabilizer and can reduce initial coloration of PVC and prolong later zinc burning. According to the technology, cold water is used for separation and purification of the product. Thus, traditional technological flow is greatly simplified, and resource waste and environmental pollution are avoided. The raw materials are easily available, and the preparation technology is simple. Therefore, the technology has a good industrial application prospect.

Description

technical field [0001] The invention relates to a new method for preparing a zinc uracil carboxylate PVC stabilizer in a heterogeneous system, and a new application of the zinc uracil carboxylate prepared by the heterogeneous system in terms of thermal stability of PVC. Background technique [0002] Polyvinyl chloride accounts for 40% of the total plastic consumption, and is the second type of plastic product in the world after polyethylene. However, its thermal stability is poor, and a certain amount of thermal stabilizer must be added to process it to prevent or slow down the thermal degradation of PVC during processing. In addition, it can also prevent PVC products from being damaged by light, heat, and oxygen during use. destructive effect, maintaining its physical properties. At present, the commonly used PVC heat stabilizers are mainly lead salts, metal soaps, organotins and other heat stabilizers containing metal ions. With the enhancement of human awareness of envi...

Claims

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Application Information

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IPC IPC(8): C07D239/54C08L27/06C08K13/02C08K5/3462C08K5/098C08K3/26
CPCC07D239/54C08K3/26C08K5/098C08K5/3462C08K13/02C08K2003/265C08L2201/08C08L27/06
Inventor 严一丰严晴
Owner SHENZHEN AIMSEA IND
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