Polypropylene resin for manufacturing medical syringe

A polypropylene resin and propylene technology, applied in the field of polypropylene resin, can solve the problems affecting the toughness of the material and the easy rupture of the syringe, and achieve the effects of high precipitation resistance, unique performance and stable high temperature processing performance.

Inactive Publication Date: 2005-10-05
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the transparency of the material is generally increased by adding a nucleating agent. The turbidity of a sheet with a thickness of 1.3mm can reach 15%, but usually the addition of a nucleating agent will affect the toughness of the material. Therefore, it is currently used in the manufacture of medical syringes. The notched impact strength of polypropylene resin is about 20J / M, and the syringe made of it is easy to break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Polypropylene resin is a random copolymer of propylene and ethylene:

[0017] The ethylene content is 0.2wt%, the melting temperature is 160-165°C, and the melt flow rate is 8.0g / 10min;

[0018] Acid neutralizer:

[0019] Calcium stearate, propylene and ethylene random copolymer / calcium stearate=100 / 0.05 (weight ratio);

[0020] Antioxidant:

[0021] 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene,

[0022] Random copolymer of propylene and ethylene / 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene=100 / 0.1 (weight ratio).

[0023] Transparent nucleating agent:

[0024] Tris(3,4-dimethylbenzylidene)sorbitol,

[0025] Random copolymer of propylene and ethylene / tris(3,4-dimethylbenzylidene)sorbitol=100 / 0.2 (weight ratio).

Embodiment 2

[0027] Polypropylene resin is a random copolymer of propylene and ethylene:

[0028] The ethylene content is 0.5wt%, the melting temperature is 150-165°C, and the melt flow rate is 12g / 10min;

[0029] Acid neutralizer:

[0030] Hydrogenated talcum powder, propylene and ethylene random copolymer / hydrogenated talcum powder=100 / 0.08 (weight ratio);

[0031] Antioxidant:

[0032] Tris(2,4-di-tert-butylphenyl)phosphite,

[0033] Random copolymer of propylene and ethylene / tris(2,4-di-tert-butylphenyl)phosphite=100 / 0.1 (weight ratio).

[0034] Transparent nucleating agent:

[0035] Bis(p-methylbenzylidene)sorbitol,

[0036] Random copolymer of propylene and ethylene / bis(p-methylbenzylidene)sorbitol=100 / 0.3 (weight ratio).

Embodiment 3

[0038] Polypropylene resin is a random copolymer of propylene and ethylene:

[0039] The ethylene content is 2.9wt%, the melting temperature is 140-165°C, and the melt flow rate is 20g / 10min;

[0040] Acid neutralizer:

[0041] Hydrogenated talcum powder, propylene and ethylene random copolymer / hydrogenated talcum powder=100 / 0.10 (weight ratio);

[0042] Antioxidant:

[0043] Di-[3,3-di-(3-tert-butyl-4-hydroxyphenyl)-butyric acid]ethylene glycol ester,

[0044] Random copolymer of propylene and ethylene / di-[3,3-di-(3-tert-butyl-4-hydroxyphenyl)-butyric acid]ethylene glycol ester=100 / 0.3 (weight ratio).

[0045] Transparent nucleating agent:

[0046] Organophosphate compound NA-21

[0047] Propylene and ethylene random copolymer / organophosphate compound NA-21=100 / 0.18 (weight ratio).

[0048] The physical index of above-mentioned each embodiment polypropylene resin is listed in Table 1.

[0049] Tensile Strength

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Abstract

This invention is polypropylene resin used for making medical injector. The resin is propene and ethane atactic multipolymer, the ethane content is 0.5-5wt%. The resin contains transparent nucleating agent, acid neutralizer and antioxidant. The weigh ratios are: propene ethane atactic multipolymer / transparent nucleating agent=100 / (0.08-0.40);propene ethane atactic multipolymer / acid neutralizer=100 / (0.01-0.10); propene ethane atactic multipolymer / antioxidant=100 / (0.02-0.30). The transparent nucleating agent is sorbitol or organic phosphate compound, the acid neutralizer is one of calcium stearate or hydro-saponite or the mixture of the two, the antioxidant is one of or mixture of hindered phenol and phosphate ester. The polypropylene resin provided by this invention has good heat endurance, intension and tenacity.

Description

technical field [0001] The present invention relates to a polypropylene resin, in particular to a polypropylene resin specially used for making medical syringes. Background technique [0002] In the prior art, plastic medical syringes are generally made of polypropylene resin. According to the special application of medical syringes, the transparency and toughness of the materials used for manufacturing have high requirements. At present, the transparency of the material is generally increased by adding a nucleating agent. The turbidity of a sheet with a thickness of 1.3mm can reach 15%, but the addition of a nucleating agent will usually affect the toughness of the material. Therefore, it is currently used in the manufacture of medical syringes. The notched impact strength of polypropylene resin is about 20J / M, and the syringe made of it is relatively easy to break. Contents of the invention [0003] The invention provides a polypropylene resin used for manufacturing med...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/178C08K5/521C08L23/14
Inventor 陶红陈海林刘勇董超陆国华将忠辉牟丹杨惠华高国强
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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