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Waterborne polyurethane resin for condom and preparation method thereof

A technology of water-based polyurethane and condoms, which is applied in the field of water-based polyurethane resin and its preparation, can solve problems such as irritation of human tissue, and achieve good stability, leveling and anti-sag properties

Inactive Publication Date: 2017-05-31
安庆市德诚化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From the above introduction, it can be seen that most of the water-based polyurethanes currently used in condoms need to be equipped with external additives. In order to maintain the stability of the formula, it is necessary to add KOH or ammonia water to adjust the pH, or add surfactants or alcohol ether solvents to adjust. The leveling of the glue; and these materials cannot form a chemical combination with polyurethane, and eventually free from the glue film, which has a certain degree of irritation to human tissue

Method used

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  • Waterborne polyurethane resin for condom and preparation method thereof
  • Waterborne polyurethane resin for condom and preparation method thereof
  • Waterborne polyurethane resin for condom and preparation method thereof

Examples

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Embodiment 1

[0036] Embodiment 1: be used to produce the aqueous polyurethane resin of condom

[0037] The aqueous polyurethane resin that is used to produce condom in the present embodiment

[0038]

[0039]

[0040] This embodiment is prepared by the following method:

[0041] 1) Put into a four-necked flask equipped with a thermometer and a stirring paddle polyoxypropylene glycol (Mn=1000), polytetrahydrofuran glycol (Mn=2000), sulfonate glycol (Mn=550), seal, Stir and heat up to 130°C, remove moisture in vacuum for 1h;

[0042] 2) Cool down to 70°C, add 20 parts of acetone, add diisocyanate monomer, stir and heat up to 85°C, keep warm for 1.5h;

[0043] 3) Add a small molecule diol chain extender, stir for 30 minutes, then add catalyst organic bismuth, and keep warm for 2-3 hours until the NCO content reaches the theoretical value;

[0044] 4) Add the remaining acetone to dilute, and cool down to 35-45°C, add water under high-speed stirring to disperse;

[0045] 5) After the ...

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PUM

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Abstract

The invention discloses a waterborne polyurethane resin for a condom and a preparation method thereof. Concretely, the waterborne polyurethane resin with higher tensile strength and high rebound resilience is prepared through introducing a reactive sulfonate monomer into the polyurethane resin through a high-speed water-adding shear emulsifying method. The resin is higher in solid content and good in sag resistance, does not contain VOC (Volatile Organic Compounds) organic solvent and volatile organic amine, cannot cause anaphylaxis to a human body, and can be used for producing a safe and environment-friendly condom.

Description

technical field [0001] The invention relates to a water-based polyurethane resin used for condoms and a preparation method thereof. Background technique [0002] Because water-based polyurethane has the advantages of strong toughness, good resilience, good ductility, environmental protection and non-toxicity, and has good biocompatibility with human tissues, many scientific researchers have done a lot in the field of water-based polyurethane application in condoms. work; patent CN102078233A introduced a kind of water-based polyurethane resin and polyisoprene latex to prepare condoms; Toxic condoms, wherein the leveling agent is an alcohol ether solvent; patent CN104479182A introduces a preparation method of a rubber-plastic synthetic ultra-thin condom, using synthetic polyisoprene, water-based polyurethane, natural latex, KOH, ammonia, etc. The material is used as a film-forming material; patent CN101348554B has invented a kind of organosilicon-modified water-based polyuret...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/32C08G18/38
CPCC08G18/12C08G18/3855C08G18/4808C08G18/4825C08G18/4854C08G18/6674C08G18/6696C08G18/3206
Inventor 王强查道友
Owner 安庆市德诚化工有限公司
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