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

A water-based polyurethane and condom technology, applied in the direction of synthetic resin layered products, layered products, rubber layered products, etc., can solve the problem of inability to remove water-soluble protein in natural latex condoms, inability to completely prevent HIV penetration, elastic elongation And softness is not good enough, to achieve the effect of no special smell, good mechanical properties, small molecular gap

Active Publication Date: 2016-08-17
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, as a material for making condoms, its elastic elongation and softness are still not good enough, the modulus is generally high, and the production method is complicated, which needs to be dissolved. , decentralized, and harsh control conditions

Method used

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

Examples

Experimental program
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Effect test

preparation example Construction

[0045] Concrete preparation method comprises the following steps:

[0046]Step 1, prepolymerization reaction: at room temperature, add diisocyanate and polytetramethylene ether glycol (PTMG) sequentially in proportion, stir and mix and heat up to 50-90°C, after 2 hours of reaction, add hydrophilic chain extender and Diluent, continue to react for 2 hours, then cool down to 40-70°C, then add cross-linking modifier and diluent, continue to react for 2 hours, cool down to below 55°C, add diluent to adjust the viscosity of the system to less than 100Pa·s, Prepare the prepolymer;

[0047] Step 2, emulsification process: add neutralizer and ice-water mixture into the reactor, turn on the stirring, keep the material at -5°C ~ 20°C, slowly add the prepolymer into it, and quickly increase the stirring speed to 2000r / min, emulsification After 10-30 minutes, add an amine chain extender to extend the chain, slowly add the amine chain extender dropwise and finish adding in one hour, and c...

Embodiment 1

[0055] 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°C, then add concentration is 30g of acetone diluent of 10% neopentyl glycol and trimethylolpropane mixture (i.e. neopentyl glycol and trimethylolpropane The quality of methylol propane mixture is 3g, acetone is 27g), after continuing reaction for 2 hours, cool down to below 55 ℃, add 13g acetone to adjust system viscosity, make prepolymer.

[0056] 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, add...

Embodiment 2

[0064] 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, that is, the material of the inner layer 2 and the outer layer 4 is water-based polyurethane, and the material of the middle layer 3 is water-based polyurethane. The material is latex.

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Abstract

The invention discloses a full-synthetic or composite water-based polyurethane condom. The full-synthetic or composite water-based polyurethane condom comprises an inner layer, a middle layer and an outer layer, wherein at least two of the three layers are made of water-based polyurethane composite materials. The full-synthetic or composite water-based polyurethane condom comprises the following materials in percentage by weight: 5-15% of diisocyanate, 12-25% of polytetramethylene ether glycol, 0.3-3% of hydrophilic chain extender, 0.3-2% of crosslinking modifying agent, 5-10% of diluting agent, 0.1-2% of a neutralizing agent, 0.1-2% of an amine chain extender and 62-70% of water. The full-synthetic or composite water-based polyurethane condom disclosed by the invention has the beneficial effects of no toxicity, no special smell, no sensitization, high strength, thinner effect and the like, and is capable of blocking viruses of venereal diseases. Compared with the existing polyurethane material, the full-synthetic or composite water-based polyurethane condom disclosed by the invention has the advantages that after film forming, the elongation is higher, the modulus is lower and the strength is higher; the elongation of the film is not less than 980%, the tensile strength is not less than 1900psi and the bursting pressure of the condom is not less than 1.0kPa.

Description

technical field [0001] The invention relates to a water-based polyurethane material and a manufacturing technology for its use, in particular to a fully 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 of HIV etc. [0004] 2), bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B25/08B32B27/06B32B27/40C08G18/66C08G18/48
Inventor 陈强
Owner 山东惠沃盛健康科技有限公司
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