A kind of preparation method of all-combined or composite water-based polyurethane condom

A water-based polyurethane and condom technology, applied in the coating and other directions, can solve the problems of natural latex condoms that cannot be removed from water-soluble proteins, cannot completely prevent HIV penetration, and the elastic elongation and softness are not good enough. Processing, no special odor, small molecular gap effect

Active Publication Date: 2016-07-13
山东惠沃盛健康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) Natural latex lacks the corresponding blocking ability for AIDS virus with a diameter of 120 nanometers, human papilloma virus between 45 nanometers and 55 nanometers, and hepatitis B virus with a diameter of 42 nanometers. Medical experiments have proved that natural latex Latex condoms cannot completely prevent the penetration of HIV etc.
[0004] 2) Since the raw materials of natural latex condoms contain a certain amount of water-soluble protein that cannot be removed, it is also easy to cause allergic reactions in the human body
Although the polyurethane of the disclosed technical solution has some excellent properties that natural latex does not have, its elastic elongation and softness still seem not good enough as a material for making a condom, and the modulus is generally high, and the manufacturing method is complicated, which needs to be dissolved, Scattered, strict control conditions

Method used

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  • A kind of preparation method of all-combined or composite water-based polyurethane condom

Examples

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Effect test

preparation example Construction

[0037] A kind of preparation method of all-combined or composite water-based polyurethane condom, by mass fraction, comprises the steps:

[0038] 1), prepolymerization reaction: at room temperature, add 5-15% diisocyanate and 12-25% polytetramethylene ether glycol (PTMG) sequentially in proportion, stir and mix and heat up to 50-90°C, react 2- After 3 hours, add 0.3-3% hydrophilic chain extender and 0.8-1.5% diluent, continue to react for 2 hours, then cool down to 40-70°C, then add 0.3-2% cross-linking modifier and 0.5- 2.7% diluent, continue to react for 2 hours, lower the temperature to below 55°C, continue to add 1.3-7% diluent to adjust the viscosity of the system to less than 100Pa·s, and obtain a prepolymer;

[0039] Acetone is used as a diluent and added in multiple times, because as the reaction progresses, the polymerization becomes larger and the viscosity becomes higher and higher. Compared with one-time addition before or after the reaction, it can better stir and...

Embodiment 1

[0053] Prepolymerization reaction: at room temperature, add 122g of toluene diisocyanate (TDI) and 120g of polytetramethylene ether glycol (PTMG) with a molecular weight of 1000 into a stirred reactor, stir and mix and heat up to 50-60°C, and react After 2 hours, add 3gDMPA and 10g acetone, continue to react for 2 hours, then cool down to 40-50°C, then add 30g of acetone diluent of 10% neopentyl glycol and trimethylolpropane mixture (i.e. neopentyl di The quality of alcohol and trimethylolpropane mixture is 3g, and acetone is 27g), after continuing to react for 2 hours, cool down to below 55 ℃, add 13g acetone to adjust system viscosity and be less than 100Pa·s, make prepolymer.

[0054] Emulsification process: Add 1g NaOH and 691g ice-water mixture into a 1000ml reactor, turn on the stirring, keep the temperature of the material at -5°C ~ 0°C, slowly add the prepolymer into it, and quickly increase the stirring speed to 2000r / min after the addition. Emulsify for 10 minutes, a...

Embodiment 2

[0062] The prepolymerization reaction and the emulsification process are the same as the steps of the above-mentioned embodiment 1, but in the secondary dipping when the condom is made, it is immersed in the latex emulsion, that is, the material of the inner layer and the outer layer is water-based polyurethane, and the material of the middle layer is emulsion.

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Abstract

The invention discloses a preparation method of a fully composite or composite water-based polyurethane condom. Acetone is used as a diluent, and diisocyanate and polytetramethylene ether glycol are added in proportion, mixed and reacted, and then a hydrophilic chain extender and a cross-linking agent are added. Combine modifier to prepare prepolymer; then add neutralizer and cool down with ice-water mixture, finally add amine chain extender to prepare water-based polyurethane emulsion, and finally make it with mold. Beneficial effects of the present invention: the composite or all-composite water-based polyurethane condom prepared by the present invention is non-toxic, has no special smell, has no sensitization, has high strength, can be thinner, has smaller molecular gaps, and can more effectively block venereal disease viruses, etc. . At the same time, the defects of low elongation after film formation, high modulus and poor strength existing in the existing polyurethane material and its preparation method are solved. Moreover, the method is simple, the operation is easy, the process conditions are mild, and there is no special requirement for equipment. The production of the condom can be carried out by using a traditional assembly line, which is convenient for mass processing.

Description

technical field [0001] The invention relates to a manufacturing technology of a water-based polyurethane material and its application, in particular to a preparation method of an all-composite or composite water-based polyurethane condom. Background technique [0002] At present, the production material of condoms is generally natural latex. Traditional natural latex condoms have the advantages of high elasticity, good flexibility, effective contraception and reduction of sexually transmitted disease infections. These cracks can block human spirits with a diameter of 5000 nanometers, but in actual use, there are still some disadvantages: [0003] 1) Natural latex lacks the corresponding blocking ability for AIDS virus with a diameter of 120 nanometers, human papilloma virus between 45 nanometers and 55 nanometers, and hepatitis B virus with a diameter of 42 nanometers. Medical experiments have proved that natural latex Latex condoms cannot completely prevent the penetration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C41/14B29C41/52C08G18/66C08G18/48C08G18/32C08G18/12
Inventor 陈强
Owner 山东惠沃盛健康科技有限公司
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