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Boron nitride reinforced waterborne polyurethane high-thermal-conductivity high-barrier material and condom

A water-based polyurethane and boron nitride technology, applied in male contraceptives, coatings, etc., can solve the problems of failing to meet the blasting test standards, affecting the appearance quality of condoms, affecting the molecular weight and its distribution, and improving the mechanical properties and barrier properties. Effects on performance, increased interaction, reduced thickness and production cost

Pending Publication Date: 2020-12-04
桂林恒保健康防护有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane is a green polymer material with good film-forming compactness, safety and non-toxicity, and has been widely used in the medical field. The condom made of water-based polyurethane is thinner and has better virus isolation effect, but the preparation of ultra-thin condoms Water-based polyurethane condoms have insufficient strength and generally fail to meet the burst test standards
The commonly used methods of strengthening water-based polyurethane materials mainly include increasing the degree of crosslinking, silane modification, graphene reinforcement, etc., but these methods have various problems and shortcomings, such as increasing the degree of crosslinking, which will cause condoms to become hard and break The elongation rate is reduced; silane modification is prone to poor compatibility and affects molecular weight and distribution; although adding graphene can effectively improve the strength, the product is brown or dark black, which seriously affects the appearance quality of condoms

Method used

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  • Boron nitride reinforced waterborne polyurethane high-thermal-conductivity high-barrier material and condom
  • Boron nitride reinforced waterborne polyurethane high-thermal-conductivity high-barrier material and condom
  • Boron nitride reinforced waterborne polyurethane high-thermal-conductivity high-barrier material and condom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A kind of boron nitride reinforced waterborne polyurethane high barrier material condom is characterized in that, the preparation method comprises the following steps:

[0062] 1) Functional modification of boron nitride surface

[0063] After adding 10g of boron nitride nanosheets into the reactor, add 200g of solvent dimethylformamide, and disperse by ultrasonic for 3h,

[0064] Add 2g of 3-aminopropyltriethoxysilane (silane coupling agent) and 0.01g of water into the reactor, heat it to 70°C and keep it warm for 5h. The supernatant is removed by centrifugation, and the lower solid is washed with dimethylformamide 2-3 times, stirred, and centrifuged to obtain a viscous semi-dry substance, and finally adjusted to a concentration of 20% with dimethylformamide to obtain surface modification Boron Nitride Dispersions (BNNTs).

[0065] 2) Preparation of interlayer boron nitride / waterborne polyurethane composite emulsion

[0066] 2.1) Add 5.2g of BNNTs with a concentrati...

Embodiment 2

[0082] A kind of boron nitride reinforced waterborne polyurethane high barrier material condom is characterized in that, the preparation method comprises the following steps:

[0083] 1) Functional modification of boron nitride surface

[0084] After adding 15g of boron nitride nanosheets into the reactor, add 400g of solvent dimethylformamide, and disperse by ultrasonic for 4h;

[0085] Add 5g of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane and 0.02g of water into the reactor, heat to 80°C and keep it warm for 5h. The supernatant is removed by centrifugation, and the lower solid is washed with dimethylformamide 2-3 times, stirred, and centrifuged to obtain a viscous semi-dry substance, and finally adjusted to a concentration of 25% with dimethylformamide to obtain surface modification Boron Nitride Dispersions (BNNTs).

[0086] 2) Preparation of interlayer boron nitride / waterborne polyurethane composite emulsion

[0087] 2.1) Add 6.2 g of 25% BNNTs and 80 g of polypropyl...

Embodiment 3

[0103] A kind of boron nitride reinforced waterborne polyurethane high barrier material condom is characterized in that, the preparation method comprises the following steps:

[0104] 1) Functional modification of boron nitride surface

[0105] After adding 20g of boron nitride nanosheets into the reactor, add 500g of solvent dimethylformamide, and disperse by ultrasonic for 4h;

[0106] Add 8g of 3-mercaptopropyltriethoxysilane and 0.05g of water and heat to 80°C and keep it for 5h. The supernatant is removed by centrifugation, and the lower solid is washed with dimethylformamide 2-3 times, stirred, and centrifuged to obtain a viscous semi-dry substance, and finally adjusted to a concentration of 30% with dimethylformamide to obtain surface modification Boron Nitride Dispersions (BNNTs).

[0107] 2) Preparation of interlayer boron nitride / waterborne polyurethane composite emulsion

[0108] 2.1) Adding 7.0g of BNNTs with a concentration of 30% in the reactor, 80g of polypro...

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Abstract

The invention provides a boron nitride reinforced waterborne polyurethane high-barrier material and a condom. The compatibility of boron nitride and a polyurethane material is improved, the interaction between boron nitride and the polyurethane molecular chain is increased, and the purpose of improving the mechanical property and the barrier property of polyurethane is achieved. Meanwhile, the boron nitride / waterborne polyurethane composite material is used as a middle interlayer, and waterborne polyurethane emulsion is used as coating layers on two sides to form a sandwich structure compositefilm, so that the thickness and the production cost of the condom can be further reduced. Finally, the boron nitride / polyurethane composite structure condom which is high in strength, good in barrierproperty and low in cost is obtained.

Description

technical field [0001] The invention relates to the field of sanitary and family planning products, in particular to a boron nitride reinforced water-based polyurethane material with high thermal conductivity and high barrier and a condom. Background technique [0002] Natural latex condoms have the advantages of readily available raw materials and simple manufacturing processes, and are currently the most widely used sexual life medical and sanitary products for contraception and prevention of sexually transmitted diseases. Natural latex condoms can effectively isolate sperm, but there are intrinsic pores of about 5 microns in the material, which poses a potential risk for blocking viruses such as hepatitis B and AIDS with smaller diameters. Water-based polyurethane is a green polymer material with good film-forming compactness, safety and non-toxicity, and has been widely used in the medical field. The condom made of water-based polyurethane is thinner and has better virus...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L75/08C08K9/06C08K7/00C08K3/38C08G18/66C08G18/48C08G18/42C08G18/32B29C41/14B29C41/20A61F6/04
CPCA61F6/04B29C41/14B29C41/20C08G18/3206C08G18/348C08G18/4018C08G18/4238C08G18/4825C08G18/6607C08G18/6625C08G18/6674C08G18/6692C08K3/38C08K7/00C08K9/06C08K2003/385C08K2201/011C08L2201/14C08L75/04C08L75/08
Inventor 王绪英
Owner 桂林恒保健康防护有限公司