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Preparation method of PVC nanometer alloy resin with high fluidity and low temperature toughness

A nano-alloy, low-temperature toughness technology, which is applied in the field of polymer copolymer resin manufacturing to achieve the effects of improving stability, toughening efficiency and dispersion degree.

Active Publication Date: 2019-05-03
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention not only improves the dispersion degree of the inner core of the elastomer, but also improves the toughening efficiency of the rubber phase. The copolymerized resin can be applied to injection-molded PVC products with high fluidity requirements, and overcomes that the current high-impact PVC alloy resin is not suitable for PVC Insufficient raw materials for injection molding

Method used

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  • Preparation method of PVC nanometer alloy resin with high fluidity and low temperature toughness
  • Preparation method of PVC nanometer alloy resin with high fluidity and low temperature toughness
  • Preparation method of PVC nanometer alloy resin with high fluidity and low temperature toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of nano seed emulsion

[0033] Add 300ml of deionized water and 0.70g of emulsifier SDS to a small autoclave equipped with mechanical stirring, thermometer and nitrogen inlet, and stir for 20min, then add the mixture of core layer monomer and crosslinking agent (20gBA, 0.20gBDDA) and 0.12 g of potassium persulfate initiator in the nuclear layer stage. Vacuumize nitrogen at room temperature and repeat twice and stir for 20 minutes, then seal the autoclave, and when the temperature of the reaction solution is constant to 75°C, heat-preserve and mature for 1 hour to complete the synthesis of the core layer emulsion.

[0034]Add 0.48 g of shell initiator potassium persulfate and 0.70 g of emulsifier SDS. Evacuate the reactor to -0.09MPa, add a mixture of shell monomer 80g BD and cross-linking agent 0.80g BDDA at one time, continue to react for 2 hours, and end the reaction. The temperature is lowered and the discharge is pumped out to obtain nano-latex wit...

Embodiment 2

[0048] (1) Preparation of nano seed emulsion

[0049] Add the mixed solution (80g BA , 1gBDDA), blow nitrogen at room temperature and stir for 20min. Close the autoclave again, pump and reduce the pressure, feed 20g of BD comonomer, and then start to heat up in a water bath. When the temperature of the reaction solution was constant to 75°C, the reaction was kept for 1 hour, and the reaction was terminated. The temperature is lowered and the discharge is pumped out to obtain the nano-seed latex.

[0050] (2) the preparation step of nano-alloy PVC resin is the same as embodiment 1 step (2)

Embodiment 3

[0052] Change the mixed solution BA and BDDA of the core layer monomer and the crosslinking agent in the embodiment 1 step (1) into BD and BDDA, and change the mixed solution BD and BDDA of the shell monomer and the crosslinking agent into BA and BDDA, All the other formulas and operations are the same as in Example 1.

[0053] Different feeding order in the embodiment of table 2 is to the performance of nano-alloy PVC resin

[0054]

[0055] It can be seen from Table 2 that when polybutadiene is the core, the resin has the highest impact strength and the best low temperature toughness. When polybutadiene is the shell, the plasticizing time of the resin is the shortest. When the two are copolymerized, the overall performance of the resin is uniform and stable.

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Abstract

The invention discloses a preparation method of a PVC nanometer alloy resin with high fluidity and low temperature toughness. The preparation method comprises following steps: 1, nanometer seed latexpreparation; and 2, PVC nanometer alloy resin preparation. According to the preparation method, (BD-ACR) nanometer alloy latex is subjected to high temperature suspension grafting copolymerization with chloroethylene so as to obtain the nanometer alloy PVC resin excellent in low temperature toughness and high in fluidity. The preparation method is capable of improving the dispersion degree of elastomer inner cores, and increasing rubber phase toughening efficiency; the obtained copolymerized resin can be used for preparing injection moulding PVC products with high requirements on fluidity, andavoiding a defect of conventional high impact resistant PVC alloy resin that the conventional high impact resistant PVC alloy resin is not suitable to be taken as a PVC injection moulding raw material.

Description

technical field [0001] The invention relates to the technical field of polymer copolymer resin manufacture, and belongs to the preparation method of high-temperature suspension graft copolymer polyvinyl chloride resin. In particular, it relates to a nano-alloy PVC resin material and a preparation method thereof, which can improve the fluidity and low-temperature toughness of composite resins. A preparation method and application thereof for obtaining an alloy resin with excellent low-temperature impact toughness and fluidity by adding (BD-ACR) nano-seed latex and high-temperature suspension polymerization. Background technique [0002] Polyvinyl chloride (PVC) material has the advantages of good rigidity, high strength, flame retardancy, corrosion resistance, good electrical insulation and adjustable hardness, but its processing performance is poor, brittle, notched impact strength and heat distortion temperature are low Therefore, it is difficult for PVC plastics to replac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F265/04C08F220/18C08F222/14C08F236/06C08F214/06C08F2/18C08F2/20C08F2/26C08F2/38
Inventor 潘明旺高申申袁金凤王健龙苏守花张广林
Owner HEBEI UNIV OF TECH
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