Porous-structure composite material for IUD (Intrauterine Device) and producing method thereof

A porous structure and composite material technology, applied in medical science, surgery, etc., can solve problems such as side effects such as bleeding and pain that cannot be overcome, and achieve the effects of improving effective utilization, increasing porosity, and reducing bleeding and pain

Active Publication Date: 2011-01-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copper-containing IUDs, which account for more than 90% of the entire IUD market, have been unable to overcome clinical side effects such as bleeding and pain during their use.
These side effects have always been an obstacle to the further popularization and application of copper-containing IUDs with excellent contraceptive effects

Method used

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  • Porous-structure composite material for IUD (Intrauterine Device) and producing method thereof
  • Porous-structure composite material for IUD (Intrauterine Device) and producing method thereof
  • Porous-structure composite material for IUD (Intrauterine Device) and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 25g of micron copper particles, 70g of medical grade low-density polyethylene (LDPE), and 5g of di-tert-butyl hydroquinone (DTBHQ), and use methods such as premixing, blending, injection or injection molding to prepare the The dense structure low-density polyethylene-based copper-containing composite material of the porogen; then use ethyl acetate as the extraction solvent to remove DTBHQ from the dense-structure low-density polyethylene-based copper-containing composite material in a Soxhlet extractor, and then The composite material after the extraction of the porogen is vacuum dried to remove ethyl acetate, and a porous structure composite material for intrauterine contraceptive devices is prepared.

Embodiment 2

[0041] Weigh 20g of nano-copper particles, 65g of medical grade silicone rubber (SIR), 15g of tertiary butyl hydroquinone (TBHQ), and add a small amount of vulcanizing agent, using methods such as premixing, blending, injection molding or injection molding and vulcanization Firstly, a dense structure silicone rubber-based copper-containing composite material containing a porogen is prepared; then acetone is used as an extraction solvent to remove the TBHQ from the dense structure silicone rubber-based copper-containing composite material by immersion in acetone for a long time, and then After the porogen is extracted, the composite material is vacuum dried to remove the acetone, and a porous structure composite material for IUD is prepared.

[0042] Examples 3-25 are all prepared by a method similar to Example 1 or Example 2, wherein the prepared porous structure composite material for intrauterine contraceptive device is the original composition and the extraction solvent used an...

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PUM

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Abstract

The invention discloses a porous-structure composite material for an IUD (Intrauterine Device) and a producing method thereof. The material includes a polymer skeleton in a porous structure and metal particles dispersed in the polymer skeleton and is prepared by extracting and clearing a pore-foaming agent in a compact-structure composite material which is obtained by the injection molding or thepressure injection of an even mixture of the metal particles, a matrix polymer and the pore-foaming agent, whrein the pore-foaming agent is preferably DTBHQ (Di-Tert-Butyl Hydroquinone), an extraction solvent is preferably ethyl acetate, and an extraction mode is preferably a Soxhelt extraction method). The porous-structure composite material for the IUD fully inherits the advantages of the compact-structure composite material for the IUD, i.e. greatly lightening the side effects of bleeding, pain, and the like brought by a traditional IUD in a bare copper structure and also has a unique advantage, i.e. greatly improving the effective utilization rate of copper particles by introducing the porous structure, thereby further effectively prolonging the service life of the IUD produced from the composite material under the condition that the addition of the copper particles is kept unchanged.

Description

Technical field [0001] The invention belongs to the field of intrauterine contraceptive devices and composite materials, and specifically relates to a porous structure composite material for preparing intrauterine contraceptive devices and a preparation method thereof. The porous structure composite material consists of a polymer skeleton with a porous structure and the It is composed of metal particles, which is obtained by loading porogen and subsequent extraction of porogen and removal of extraction solvent during the process of preparing dense structure composite materials for intrauterine devices. The porous structure composite material of IUD. technical background [0002] China is a developing country with a population of 1.3 billion. The overall solution to the population problem has always been a major and urgent strategic task facing China to achieve economic development, social progress, and sustainable development. Family planning is a basic national policy of China...

Claims

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Application Information

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IPC IPC(8): A61L31/12A61L31/14A61L31/16
Inventor 谢长生夏先平蔡水洲汤滢王芸
Owner HUAZHONG UNIV OF SCI & TECH
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