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Silica gel catheter sacculus with high tear strength and preparation method thereof

A technology of high tear strength and urinary catheter, which is applied in the direction of balloon catheter, etc., to achieve the effect of optimizing the process formula, improving the tear resistance and reducing the problem of rupture

Active Publication Date: 2014-07-30
浙江优特格尔医疗用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most of the above examples, the cellulose whiskers are dispersed in a liquid solvent and then compounded with the polymer matrix, while the surface modification of the cellulose whiskers is directly compounded with silica gel in powder form to improve its tear resistance and is used in medical devices. There are few reports at home and abroad

Method used

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  • Silica gel catheter sacculus with high tear strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A high-tear strength silicone urinary catheter balloon and its preparation method in this embodiment include the following steps: 1) Preparation of modified cellulose whiskers: 2.0 g of cotton fibers with a diameter of 20 to 40 nm and a length of Cellulose whiskers with a thickness of 300-500nm were placed in 20mL of 10% silane coupling agent KH550 solution, reacted at room temperature for 15min, washed by centrifugation, and spray-dried to obtain modified cellulose whisker powder; 2) Modified fiber Mixing of plain whiskers and silica gel: the silica gel compound A component, namely the silica gel compound of the model HCRA 4130, and the silica gel compound B component, namely the silica gel compound of the model HCRA 4130 containing 0.2% platinum catalyst, according to 1: 1 ratio mixing, the total amount of compounded rubber is 100g, and at the same time add 0.3g of the modified cellulose whisker powder prepared in step 1), and add 0.5g of cross-linking agent dicumyl pe...

Embodiment 2

[0018] A high-tear strength silicone urinary catheter balloon and its preparation method in this embodiment include the following steps: 1) Preparation of modified cellulose whiskers: 2.0 g of tunicate cellulose with a diameter of 20~ 40nm, 300-1000nm long cellulose whiskers were placed in 20ml of 10% silane coupling agent KH550 solution, reacted at room temperature for 15min, washed by centrifugation, and spray-dried to obtain modified cellulose whisker powder; 2) Mixing of modified cellulose whiskers and silica gel: the silica gel compound A component, namely the silica gel compound of the model HCRA 4130, and the silica gel compound B component, namely the silica gel compound of the model HCRA 4130 containing 0.7% platinum catalyst Mix according to the ratio of 1:1, the total amount of mixed rubber is 100g, and add 0.5g of the modified cellulose whisker powder prepared in step 1) at the same time, and add 0.3g of crosslinking agent dicumyl peroxide (DCP) Mix evenly, put it ...

Embodiment 3

[0021]A high-tear strength silicone urinary catheter balloon and its preparation method in this embodiment include the following steps: 1) Preparation of modified cellulose whiskers: 2.0 g of cellulose derived from Gluconacetobacter cellulose with a diameter of 10 ~20nm, cellulose whiskers with a length of 100~500nm were placed in 20ml of 10% silane coupling agent KH550 solution, reacted at room temperature for 15min, washed by centrifugation, and spray-dried to obtain modified cellulose whisker powder; 2 ) Mixing of modified cellulose whiskers and silica gel: the silica gel compound A component, which is the silica gel compound of model HCRA 4130, and the silica gel compound B component, which is the silica gel compound of the model HCRA 4130 containing 0.45% platinum catalyst The materials are mixed according to the ratio of 1:1, the total amount of the mixed rubber is 100g, and 1.0g of the modified cellulose whisker powder prepared in the step 1) is added at the same time, a...

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Abstract

The invention discloses a silica gel catheter sacculus with high tear strength and a preparation method thereof. Cellulose whisker is modified by using a silane coupling agent KH550 to obtain modified cellulose whisker powder. The modified cellulose whisker is mixed with silica gel evenly and molded by pressing through a vulcanizing mold, and the silica gel catheter sacculus with the high tear strength is obtained. The silica gel catheter sacculus has the advantages of improving the tear strength and being high in elasticity. The process is simple and environment-friendly, and products are safe and non-toxic.

Description

technical field [0001] The invention relates to a high-tear strength silicone urinary catheter balloon and a preparation method thereof, belonging to the technical field of medical device preparation. Background technique [0002] Silicone balloon catheter is widely used as a long-term implant in the body because of its soft performance, good tissue compatibility, no need for external fixation, convenient care, and the ability to avoid or reduce urethral mucosal injury and urinary tract infection. . However, after the catheter is implanted in the body, as the indwelling time prolongs, the catheter balloon is prone to rupture, causing the catheter to fall off, and the catheter needs to be replaced, which not only increases the economic burden of the patient but also increases the suffering of the patient. At present, domestic enterprises or scientific research institutes have no effective solution to this problem, and a few manufacturers in developed countries in Europe and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L1/02C08J3/24A61M25/10
Inventor 刘伯福
Owner 浙江优特格尔医疗用品有限公司