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Application of low-ammonia rubber latex or no-ammonia rubber latex in medical catheter

A medical catheter and natural rubber latex technology, applied in the field of natural latex, can solve the problems of affecting normal use and destroying the biological inertia of rubber products, and achieve the effects of saving energy consumption, reducing the amount of sulfuric acid, and saving production costs

Active Publication Date: 2019-07-30
RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural rubber has not been preserved with mature preservatives such as ammonia and TT / ZnO before the preparation of corresponding products. If any errors occur in the sterilization and stabilization of natural latex, it may be due to the rich nutrition in natural latex. Under the action of substances, microorganisms and other components, the biological inertia of rubber products will be destroyed, affecting its normal use

Method used

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  • Application of low-ammonia rubber latex or no-ammonia rubber latex in medical catheter
  • Application of low-ammonia rubber latex or no-ammonia rubber latex in medical catheter
  • Application of low-ammonia rubber latex or no-ammonia rubber latex in medical catheter

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preparation example Construction

[0050] A second aspect of the present invention provides a method for preparing a medical catheter as described above, comprising the following steps:

[0051] S01: After preheating the natural rubber latex, add a vulcanizing agent, a vulcanization accelerator and a solubilizer, and disperse and mix to obtain a latex mixture;

[0052] S02: After adjusting the concentration of the latex mixture obtained in step S01, immerse the catheter mold with the coagulant on the surface into the latex mixture, then take it out and dry it;

[0053] S03: The mold obtained in step S01 is soaked in glue again, taken out and dried, demolded and cleaned.

[0054] In some embodiments, the preheating temperature in step S01 is 60-70° C., and the preheating time is 3-4 hours.

[0055] In some embodiments, the drying temperature in step S03 is 80-100° C., and the drying time is 1.5-2.5 hours.

[0056] The concrete example of medical catheter described in the present invention can be medical cathet...

Embodiment 1

[0068] Embodiment 1 provides a kind of medical catheter, and its preparation raw material, by weight, comprises natural rubber latex 100, vulcanization agent 1, vulcanization accelerator 3, solubilizer 1; Said vulcanization accelerator, by weight, consists of two Zinc ethyl dithiocarbamate 0.5, tetramethylthiuram disulfide 0.7, zinc oxide 0.2, zinc carbonate 0.3, magnesium oxide 0.1 and 2,2'-dithiodibenzothiazole 0.3; The solvent, in parts by weight, consists of 0.1 casein, 0.3 Dasada sodium salt, 0.05 lauric acid, 0.15 wetting agent, 0.15 potassium hydroxide, and 0.15 water-soluble polymer material; the wetting agent is sorbitan mono Stearic acid ester (HLB value is 4.3), purchased from Guangzhou Zhiyou Additive Co., Ltd.; Described water-soluble macromolecular material is polyacrylamide, purchased from Shanghai Xibao Biotechnology Co., Ltd. (trade mark is 500K, weight average molecular weight is 524000, the intrinsic viscosity is 2.25dL / g);

[0069] The natural latex is obt...

Embodiment 2

[0079] Embodiment 2 provides a kind of medical catheter, and its preparation raw material comprises natural latex 100, vulcanization agent 2, vulcanization accelerator 6, solubilizer 3 in parts by weight; the vulcanization accelerator, in parts by weight, consists of two Zinc ethyl dithiocarbamate 1.5, tetramethylthiuram disulfide 2, zinc oxide 1.2, zinc carbonate 1.5, magnesium oxide 0.5 and 2,2'-dithiodibenzothiazole 1.5; The solvent, in parts by weight, is composed of 0.3 casein, 0.5 Dasada sodium salt, 0.1 lauric acid, 0.2 wetting agent, 0.25 potassium hydroxide, and 0.2 water-soluble polymer material; the wetting agent is sorbitan mono Oleic acid fat (HLB value is 4.7), purchased from Guangzhou Zhiyou Additive Co., Ltd.; Described water-soluble polymer material is polyvinyl alcohol, purchased from KURARAY company (brand is KURARAY POVAL 5-98; Polymerization degree is 1700, alcohol Resolution ≥ 98%).

[0080] The natural latex is obtained after the natural fresh latex (cu...

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Abstract

The invention relates to the field of natural rubber latex, in particular to application of a low-ammonia rubber latex in a medical catheter and a preparation method of a product prepared from the low-ammonia rubber latex. The medical catheter is prepared from, by weight, 100 parts of natural rubber latex, 1-2 parts of a vulcanizing agent, 3-6 parts of a vulcanization accelerator and 1-3 parts ofa solubilizer; the vulcanization accelerator is prepared from diethyl dithiocarbamic acid, tetramethylthiuram disulfide, zinc oxide, zinc carbonate, magnesium oxide and 2,2'-dithiobisbenzothiazole.

Description

technical field [0001] The invention relates to the field of natural latex, in particular to the application of low-ammonia latex in medical catheters and a preparation method for its products. Background technique [0002] Natural rubber is an important strategic resource and industrial raw material, which is widely used in various fields such as industry, agriculture, national defense, transportation, and medical care. Its composition is more complex than synthetic latex, and it has biological properties. For example: to transmit water, nutrients, trace elements, auxins for the growth of rubber trees, and to regulate the biochemical balance and acid-base balance of the plant's internal environment, there must be some functional group molecules with biological attributes, and even contain genetic code information. The existence in the rubber liquid will inevitably have a relatively independent package interface. Due to the existence of the above components, the natural la...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08L33/26C08L89/00C08K13/06C08K3/22C08K3/26C08K5/103C08K5/32
CPCC08K2003/222C08K2003/2296C08L7/02C08L2201/08C08L2203/18C08L2205/03C08L33/26C08L89/00C08K13/06C08K3/22C08K3/26C08K5/103C08K5/32
Inventor 桂红星丁丽孙东华赵立广李建伟宋亚忠黄红海王岳坤
Owner RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI