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TPU material for medical conduit and preparation method thereof

A catheter and raw material technology, which is applied in the field of TPU materials for medical catheters and its preparation, can solve problems such as difficult recycling, complicated preparation, and patient allergies, and achieve the effects of improving light transmittance, good transparency, and improving antibacterial properties

Inactive Publication Date: 2017-07-11
DONGGUAN JIXIN POLYMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because the traditional medical catheters in the body are made of natural rubber, latex and silica gel, although the clinical application has continued for many years, the patient's allergies and material cracking have occurred in clinical practice, the preparation is complicated, and it is difficult to recycle and reuse, causing environmental pollution

Method used

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  • TPU material for medical conduit and preparation method thereof
  • TPU material for medical conduit and preparation method thereof
  • TPU material for medical conduit and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, the TPU material is prepared from the following raw material components:

[0042]

[0043]Wherein the diisocyanate is a mixture of isophorone diisocyanate and hexamethylene diisocyanate, the mass ratio of isophorone diisocyanate and hexamethylene diisocyanate is 3:1; polyol is polyether polyol and polycarbonate polyol, polyether polyol and The mass ratio of the polycarbonate polyol is 1:1, and the number average molecular weight of the polyol is 2000, the chain extender is ethylene glycol, and the catalyst is stannous octoate.

[0044] The preparation method is as follows:

[0045] (1) Add polyol and nano-silver particles to material tank A, add diisocyanate to material tank B, add chain extender and catalyst to material tank C, and vacuum dehydrate at 90°C under stirring conditions, and inject into twin-screw extruder out of the machine;

[0046] (2) add chitosan and polypropylene at the feeding port of the twin-screw extruder, react in the twi...

Embodiment 2

[0048] In this embodiment, the TPU material is prepared from the following raw material components:

[0049]

[0050] Wherein diisocyanate is the mixture of isophorone diisocyanate and hexamethylene diisocyanate, and the mass ratio of isophorone diisocyanate and hexamethylene diisocyanate is 4:1; Polyol is polyether polyol and polycarbonate polyol, polyether polyol and The mass ratio of the polycarbonate polyol is 1:2, and the number average molecular weight of the polyol is 2500, the chain extender is ethylenediamine, and the catalyst is dibutyltin laurate.

[0051] The preparation method is as follows:

[0052] (1) Add polyol and nano-silver particles to material tank A, add diisocyanate to material tank B, add chain extender and catalyst to material tank C, dehydrate under vacuum at 95°C under stirring conditions, and inject into twin-screw extruder out of the machine;

[0053] (2) add chitosan and polypropylene at the feeding port of the twin-screw extruder, react in ...

Embodiment 3

[0055] In this embodiment, the TPU material is prepared from the following raw material components:

[0056]

[0057] Wherein diisocyanate is the mixture of isophorone diisocyanate and hexamethylene diisocyanate, and the mass ratio of isophorone diisocyanate and hexamethylene diisocyanate is 5:1; Polyol is polyether polyol and polycarbonate polyol, polyether polyol and The mass ratio of the polycarbonate polyol is 1:3, and the number average molecular weight of the polyol is 1000, the chain extender is 1,3-propanediol, and the catalyst is dibutyltin dioctoate.

[0058] The preparation method is as follows:

[0059] (1) Add polyol and nano-silver particles to material tank A, add diisocyanate to material tank B, add chain extender and catalyst to material tank C, dehydrate under vacuum at 80°C under stirring conditions, and inject into twin-screw extruder out of the machine;

[0060] (2) add chitosan and polypropylene at the feeding port of the twin-screw extruder, react i...

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Abstract

The invention provides a TPU material for a medical conduit and a preparation method thereof. The TPU material comprises, by weight, 40 to 60 parts of diisocyanate, 20 to 40 parts of polyol, 10 to 20 parts of polypropylene, 5 to 10 parts of chitosan, 0.1 to 2 parts of nanosilver particles, 5 to 10 parts of a chain extender and 0 to 3 parts of a catalyst. The TPU material provided by the invention has tensile strength of 40 to 55 MPa, elongation at break of 550 to 700%, moderate hardness of 70 to 75 A, good biocompatibility and a bacteriostasis rate of 98% or above, and is applicable as a material for the medical conduit.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a TPU material for medical catheters and a preparation method thereof. Background technique [0002] Because traditional in vivo medical catheters are made of natural rubber, latex and silica gel, although they have been used in clinical practice for many years, patients are allergic and materials crack in clinical practice. The preparation is complicated and difficult to recycle and reuse, causing environmental pollution. [0003] Thermoplastic polyurethane (TPU) is a new type of organic polymer synthetic material. It has excellent properties and can replace rubber, soft polyvinyl chloride material PVC, etc. It has excellent physical properties, such as wear resistance and resilience. It is better than ordinary polyurethane and PVC, and its aging resistance is better than that of rubber, and it does not need to be vulcanized. It can be said to be the most ideal material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L23/12C08L5/08C08G18/66C08G18/32C08G18/44C08G18/48C08K3/08A61L29/06A61L29/04A61L29/02A61L29/14A61L29/16
CPCC08L75/06A61L29/02A61L29/041A61L29/043A61L29/06A61L29/14A61L29/16A61L2300/104A61L2300/404C08G18/3206C08G18/3228C08G18/44C08G18/48C08G18/6607C08G18/6618C08K3/08C08K2003/0806C08K2201/011C08L75/08C08L2203/02C08L2203/18C08L2205/03C08L23/12C08L5/08
Inventor 何建雄王一良杨博
Owner DONGGUAN JIXIN POLYMER SCI & TECH