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Rigid medical injection molding PVC plastic with ultra-high transparency and high thermal stability

A technology with high thermal stability and transparency, applied in the field of modified PVC materials, can solve the problems of PVC transparency and thermal stability that have not been completely resolved, and achieve the effects of broadening the medical application field, reasonable formula, and low energy consumption

Inactive Publication Date: 2020-04-10
上海新上化高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many researches on this aspect in China. Usually, the requirement of transparency is compensated by sacrificing the stability of PVC. Therefore, the technical contradiction between PVC transparency and thermal stability has not been completely resolved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 100 parts of polyvinyl chloride resin;

[0029] Dioctyl phthalate DOP 11 parts;

[0030] 4 parts of epoxidized soybean oil ESO;

[0031] 1.5 parts of calcium zinc stabilizer;

[0032] 0.6 parts of octadecyl pentaerythritol diphosphite;

[0033] 0.2 parts of dibenzylidene sorbitol;

[0034] 0.20 parts of ethylene bis stearic acid amide;

[0035] 0.05 part of complex ester;

[0036] 0.1 parts of silicone oil.

[0037] Preparation:

[0038] (1) Preparation of PVC pellets. The components are mixed at a high speed and discharged at 120°C; then the premixed material is put into an internal mixer for plasticization, the plasticizing temperature is 125°C, and the plasticizing time is 5 minutes; finally, the plasticized dough is fed into the double-cone screw For extrusion granulation, the extrusion temperature is 130-140° C., the screw speed is 6 rpm, and the granulator speed is 16 rpm.

[0039] (2) Preparation of PVC hard board. The pellets prepared above were molded...

Embodiment 2

[0041] 100 parts of polyvinyl chloride resin;

[0042] Dioctyl phthalate DOP 10 parts;

[0043] 6 parts of epoxidized soybean oil ESO;

[0044] 2 parts of calcium zinc stabilizer;

[0045] 0.5 parts of octadecyl pentaerythritol diphosphite;

[0046] 0.3 parts of dibenzylidene sorbitol;

[0047] 0.15 parts of ethylene bis stearic acid amide;

[0048] 0.05 part of complex ester;

[0049] 0.15 parts of silicone oil.

[0050] Preparation:

[0051] (1) Preparation of PVC pellets. The components are mixed at a high speed and discharged at 122°C; then the premix is ​​put into the internal mixer for plasticization, the plasticizing temperature is 128°C, and the plasticizing time is 7 minutes; finally, the plasticized dough is fed into the double-cone screw For extrusion granulation, the extrusion temperature is 130-140° C., the screw speed is 7 rpm, and the granulator speed is 17 rpm.

[0052] (2) Preparation of PVC hard board. The pellets prepared above were molded by a fla...

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Abstract

Rigid medical injection molding PVC plastic with ultra-high transparency and high thermal stability is provided. The plastic is characterized by comprising, by weight, 100 parts of polyvinyl chlorideresin, 10-20 parts of a plasticizer, 1-3 parts of a heat stabilizer, 0.2-0.8 part of an antioxidant, 0.1-0.4 part of a nucleating agent, 0.2-0.4 part of a lubricant. The plastic is reasonable in formula, stable in performance, simple in process and low in cost. The processability of PVC plastic is effectively improved, the medical application range is broadened, and the disclosed PVC plastic is ofgreat significance to development of medical and health services in China and the world.

Description

technical field [0001] The invention relates to a modified PVC material, in particular to a PVC plastic with super high transparency and high thermal stability. Background technique [0002] PVC has the advantages of flame retardancy, weather resistance, corrosion resistance, water and chemical corrosion resistance, and good comprehensive mechanical properties. The disadvantage is poor thermal stability and impact resistance. Pure PVC resin has no practical significance, and the actual performance of PVC plastic depends on the composition of the mixture including PVC resin and various additives. [0003] PVC is one of the most thermally degradable polymers. With the increase of processing temperature, PVC resin gradually changes from initial transparency to yellow, and finally turns to brown. HCl by-products will be generated during the whole process, so the processing of pure PVC resin is severely limited. By mixing PVC resin with additives such as plasticizers and therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L91/00C08L83/04C08K5/12C08K5/20C08K5/527
CPCC08L27/06C08L2201/08C08L2201/10C08L91/00C08L83/04C08K5/12C08K5/20C08K5/527
Inventor 陆帅羽王芹唐艳芳徐晓辉徐永卫
Owner 上海新上化高分子材料有限公司
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