Method for preparing nano montmorillonite modified natural emulsion medical product

A technology of nano-montmorillonite and natural latex, which is applied in the field of preparation of nano-montmorillonite-modified natural latex medical products, can solve the problems that the tensile strength and tear resistance cannot meet the requirements, the aging resistance is not enough, and the product is prone to cracking, etc. Achieve the effects of ensuring stable deformation resistance, preventing cracks from spreading to the rubber phase, and improving tear strength

Inactive Publication Date: 2006-08-23
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Since latex gloves and condoms are mostly thin products, coupled with the restrictions on anti-aging agents in medical products, the products generally have shortcomings such as insufficient aging resistance, short storage period, and easy aging and stickiness.
[0005] 2. Since many reinforcing agents cannot be added, its tensile and tear resistance cannot meet the requirements, and the product is prone to cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The basic process formula for producing latex condoms, medical gloves, and examination gloves is as follows (by mass):

[0022] Concentrated natural rubber latex with dry rubber content of 60% 100

[0023] Nano montmorillonite 0.5-3.0

[0024] Dispersant (emulsifier OP: alkylphenol polyoxyethylene ether) 0.3

[0025] Dry enzyme 0.1

[0026] KOH0.05

[0027] sulfur 1

[0028] Accelerator PX (zinc N-ethyl-N-phenyldithiocarbamate) 0.8

[0029] Accelerator ZDC (zinc diethyldithiocarbamate) 1

[0030] Antiaging agent 264 (2,6-di-tert-butyl-p-cresol) 1.5

[0031] ZnCO 3 1

[0032] Implementation steps:

[0033] First, mix 0.5-3.0 parts of organic montmorillonite treated with dodecyl to octadecyltrimethylammonium chloride or ammonium bromide with 4-5 times deionized water, then add 0.075 parts of dispersant and 10-25 % grinding aid polypropylene (in terms of montmorillonite amount), and then adopt methods such as ...

Embodiment 2

[0036] The basic process formula for producing latex urinary catheter is as follows (by mass):

[0037] Concentrated natural rubber latex with dry rubber content of 60% 100

[0038] Nano-montmorillonite 1-3.5

[0039] Dispersant (emulsifier T: sorbitan fatty acid ester polyoxyethylene ether) 0.3

[0040] Dry enzyme 0.1

[0041] KOH0.05

[0042] sulfur 1

[0043] Accelerator PX (zinc N-ethyl-N-phenyldithiocarbamate) 0.8

[0044] Accelerator ZDC (zinc diethyldithiocarbamate) 1

[0045]Antiaging agent 264 (2,6-di-tert-butyl-p-cresol) 1.5

[0046] ZnCO 3 1

[0047] Implementation steps:

[0048] First, mix 1-3.5 parts of sodium montmorillonite with 4-5 times of deionized water, then add 0.075 parts of dispersant and 10-25% of grinding aid polyethylene (based on the amount of montmorillonite), and then use ball milling method, The montmorillonite is treated for 3-24 hours by means of colloid millin...

Embodiment 3

[0051] The basic process formula for producing latex blood transfusion hose is as follows (by mass):

[0052] Concentrated natural rubber latex with dry rubber content of 60% 100

[0053] Nano-montmorillonite 2-3.9

[0054] Dispersant (Pingpingjia: fatty alcohol polyoxyethylene ether) 0.2

[0055] sulfur 1

[0056] Accelerator DM (benzothiazole disulfide) 0.8

[0057] Accelerator TT (tetramethylthiuram disulfide) 0.8

[0058] Antiaging agent 264 (2,6-di-tert-butyl-p-cresol) 1.5

[0059] ZnCO 3 1

[0060] Implementation steps:

[0061] First mix 2-3.9 parts of montmorillonite original soil from clay minerals with 4-5 times deionized water, then add 0.075 parts of dispersant and 10-25% of polyethylene and polystyrene mixed micropowder (using montmorillonite Soil meter), and then use methods such as ball milling, colloid milling, sand milling, vibration milling or impact milling to process the montmorillonite for 2-24 ho...

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PUM

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Abstract

The present invention discloses the preparation process of nanometer montmorillonite modified natural latex for medical product. Montmorillonite, which may be natural montmorillonite mineral, nanometer montmorillonite, organic montmorillonite treated with C12-C18 alkyl trimethyl ammonium chloride or ammonium bromide or nanometer montmorillonite through mechanical and chemical grinding, is added into natural rubber latex in the sulfurizing or cooperating stage, and through the subsequent dispersion, pressurizing or dipping, washing, filtering and sulfurizing drying, the modified product is obtained. The present invention has simple technological process, and the prepared medical product has excellent ageing resistance, high tensile and breaking strength, and good microbe permeation resistance.

Description

technical field [0001] The invention relates to a preparation method of medical products such as condoms, medical gloves, examination gloves, urinary catheters, blood transfusion hoses, etc., which use natural rubber latex as raw materials. Background technique [0002] Natural rubber latex is produced from Hevea brasiliensis and is a natural polymer product. The preparation of medical products from natural rubber latex has the following advantages: direct production and processing from natural product latex, simple processing technology, easy gelation, good film-forming properties, high wet gel strength, easy vulcanization, low cost, less environmental pollution, and belongs to environmentally friendly production ;The product has high elasticity, high strength, small creep, and excellent comprehensive performance; it comes from natural biological products, no low molecular components and additives of synthetic materials, etc., and has little impact on the human body; The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/34C08L7/02A61L29/04A61B19/04A61B42/00A61F6/04A61M25/00
Inventor 敖宁建
Owner JINAN UNIVERSITY
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