Raw material dry-state proportion and preparation vulcanization process of latex for producing low-nitrosamine condom

A nitrosamine and condom technology, applied in male contraceptives, etc., can solve the problem that the safety risk residue of chemical cleaning has not been fully evaluated and verified, and achieve the effect of reducing the risk of carcinogenicity and using it safely and reliably

Active Publication Date: 2012-10-24
SHANGHAI MINGBANG RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

This solution has not fundamentally eliminated the factors that produce N-nitrosamines, and whethe

Method used

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  • Raw material dry-state proportion and preparation vulcanization process of latex for producing low-nitrosamine condom

Examples

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Example Embodiment

[0031] Example 1

[0032] A preparation and vulcanization process of latex for the production of low nitrosamine condoms, including the following steps:

[0033] (1) Weigh the designated raw materials according to the weights in the following table 1, and formulate them into an aqueous solution or emulsion to disperse in water. Their mass percentage concentrations are: natural rubber latex-60%, sulfur-50%, and ZnO-50% , Environment-friendly vulcanization accelerator A-50%, environment-friendly vulcanization accelerator B-50%, antioxidant -40%, KOH-10%, casein -10%, sodium methylene dinaphthalene sulfonate -10%, Among them, the environmentally-friendly vulcanization accelerator A uses zinc dibenzyl dithiocarbamate, the environmentally-friendly vulcanization accelerator B uses tetrabenzyl thiuram disulfide, and the antioxidant uses 2,6-di-tert-butyl-4-methyl Base phenol

[0034] (2) Add the natural latex emulsion prepared according to step (1) into the vulcanizing tank;

[0035] (3) T...

Example Embodiment

[0044] Example 2

[0045] Weigh the designated raw materials according to the parts by weight in Table 1 and repeat the method of Example 1. Among them, the environmentally friendly vulcanization accelerator A uses zinc diisobutyl dithiocarbamate, and the environmentally friendly vulcanization accelerator B uses tetrabenzyl Thiuram disulfide and antioxidant are 2,6-di-tert-butyl-4-methylphenol.

Example Embodiment

[0046] Example 3

[0047] Weigh the designated raw materials according to the parts by weight in Table 1 and repeat the method in Example 1. Among them, the environmentally friendly vulcanization accelerator A uses zinc dibutyl dithioformate, and the environmentally friendly vulcanization accelerator B uses tetraisobutyl dithioate. Thiuram sulfide and antioxidant are butylated products of p-cresol and dicyclopentadiene.

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Abstract

The invention relates to a raw material dry-state proportion and a preparation vulcanization process of latex for producing low-nitrosamine condom. The dry-state proportion comprises 0.9-1 part of sulfur, 0.5-0.7 part of ZnO, 0.3-0.6 part of environment-friendly type vulcanization accelerator A, 0-0.3 part of environment-friendly type vulcanization accelerator B, 0.6-1 part of an anti-aging agent, 0.08 part of sodium methylene dinaphthyl sulfonate, 0.25 part of casein, 0.08 part of KOH and 100 parts of natural latex. The vulcanization process comprises ten steps, and can be used for preparation vulcanization production of latex for producing low-nitrosamine condom. In the natural latex rubber condom produced by the latex, the nitrosamine residue, namely the content of N-nitrosamine is smaller than 0.01mg/kg or is not basically detected, therefore, the use is safe and reliable and the carcinogenesis risk is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of condom production, and in particular relates to the raw material dry-state ratio of latex used in low-nitrosamine condom production and its preparation and vulcanization process. Background technique [0002] As a simple and effective contraceptive method, condoms have been widely promoted in countries all over the world and accepted by the public. Natural rubber latex has excellent comprehensive properties, and medical products prepared with it are widely used in the world. At present, more than 90% of the materials commonly used in condoms are natural rubber latex. The main component of latex is polyisoprene, with a content of more than 90%. Its structural formula: (CH 2 -C=CH-CH 2 ) n , the molecular weight is between 10 and 1.8 million. Latex has good film-forming properties and elasticity, high wet gel strength, good mechanical properties, high mechanical stability and good stability. After the ...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08K13/02C08K3/06C08K3/22C08K5/42C08K5/372C08K5/5398C08K5/40C08K5/13C08J3/26A61F6/04
Inventor 朱正君潘青青蔡启华
Owner SHANGHAI MINGBANG RUBBER PROD
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