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Preparation method of medical organic silicon rubber composition

A technology of silicone rubber and composition, applied in the field of silicone rubber, can solve the problems of infection, mechanical properties, tensile strength, insufficient tear strength, and bacterial reproduction of silicone rubber.

Inactive Publication Date: 2020-06-19
孟令芝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a material for medical catheters, in addition to silicone rubber, soft polyvinyl chloride is generally used. Compared with polyvinyl chloride materials, silicone rubber has excellent biological adaptability and flexibility, but its mechanical properties, especially tensile strength and tear Insufficient cracking strength
In addition, as a medical material, there may be a large number of bacteria on the surface of silicone rubber, which may even cause infection
[0003] CN104448443A discloses a corrosion-resistant medical rubber and its preparation method, which uses styrene-butadiene rubber, fluorosilicone rubber, and EPDM rubber, but the preparation method does not use a vulcanizing agent, and the obtained material is difficult to have good mechanical properties
[0004] CN10444828A discloses a kind of antibacterial drug-loaded microsphere silicone rubber composite material. The method adopts silicone rubber matrix and PLGA drug-loaded microspheres to mix evenly. The prepared composite material has good antibacterial properties, but its mechanical properties are relatively poor

Method used

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  • Preparation method of medical organic silicon rubber composition
  • Preparation method of medical organic silicon rubber composition
  • Preparation method of medical organic silicon rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0099] 65 parts by weight of fumed silica (specific surface area 250m 2 / g, the product of Cabot Company of the United States) into the reaction kettle, add 650 parts by weight of deionized water and stir evenly, heat to 75°C with an oil bath, adjust the pH value of the solution to 3.5 with dilute sulfuric acid, add the mass of white carbon black 3-(trimethoxy-silyl)propyldimethyloctadecylammonium chloride with a content of 10%, the reaction time is 2.5 hours, suction filtration, and drying to obtain medical antibacterial filler.

Synthetic example 2

[0101] 70 parts by weight of fumed silica (specific surface area 250m 2 / g, the product of Cabot Company of the United States) into the reaction kettle, add 700 parts by weight of deionized water and stir evenly, heat to 80°C with an oil bath, adjust the pH value of the solution to 3.5 with dilute sulfuric acid, add the mass of white carbon black 3-(triethoxy-silyl)propyl dimethyl octadecyl ammonium chloride with a content of 12%, the reaction time is 3 hours, suction filtration, and drying to obtain medical antibacterial filler.

Synthetic example 3

[0103] 70 parts by weight of fumed silica (specific surface area 250m 2 / g, the product of Cabot Company of the United States) into the reaction kettle, add 700 parts by weight of deionized water and stir evenly, heat to 80°C with an oil bath, adjust the pH value of the solution to 4 with dilute sulfuric acid, add the mass of white carbon black 3-(trimethoxy-silyl)propyldimethyloctadecylammonium chloride with a content of 10%, the reaction time is 3.5 hours, suction filtration, and drying to obtain medical antibacterial filler.

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Abstract

The invention relates to a preparation method of a medical organic silicon rubber composition, wherein the medical organic silicon rubber composition is composed of (i) organopolysiloxane containing two or more unsaturated groups, (ii) polyhydrosiloxane, (iii) a medical antibacterial filler, (iv) a platinum catalyst and (V) an inhibitor, and is prepared by heating and curing at 130-200 DEG C afteruniform mixing. According to the medical organic silicon rubber composition provided by the invention, the medical antibacterial filler is used as a reinforcing filler and can improve the mechanicalproperty and antibacterial property of the medical organic silicon rubber composition at the same time, and the medical organic silicon rubber composition can be used for preparing medical hoses and catheters and has huge application prospects in other fields.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a medical silicone rubber composition and a preparation method thereof. Background technique [0002] Silicone rubber is physiologically inert and less reactive when in contact with biological tissues, so it is widely used in the medical industry, such as medical hoses, catheters, etc. As a material for medical catheters, in addition to silicone rubber, soft polyvinyl chloride is generally used. Compared with polyvinyl chloride materials, silicone rubber has excellent biological adaptability and flexibility, but its mechanical properties, especially tensile strength and tear Insufficient crack strength. In addition, as a medical material, there may be a large number of bacteria on the surface of silicone rubber, which may even cause infection. [0003] CN104448443A discloses a corrosion-resistant medical rubber and a preparation method thereof, which uses styrene-butadiene rubber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/06C08K7/26
CPCC08L83/04C08L2205/025C08K9/06C08K7/26
Inventor 孟令芝
Owner 孟令芝