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Thermo-sensitive condom based on waterborne polyurethane and preparation method thereof

A technology of water-based polyurethane and condoms, which is applied in the direction of male contraceptives and coatings, and can solve the problems of large strength drop, poor softness and comfort, and easy damage

Active Publication Date: 2020-10-23
四川尤博瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0036] In the above background, the purpose of the present invention is to solve the above-mentioned performance deficiencies in the existing condom products, and provide a heat-sensitive condom based on water-based polyurethane and its preparation method to solve the problems in the production of existing water-based polyurethane condoms On the one hand, it solves the problems of high modulus, high hardness, and poor softness and comfort of polyurethane condoms;

Method used

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  • Thermo-sensitive condom based on waterborne polyurethane and preparation method thereof
  • Thermo-sensitive condom based on waterborne polyurethane and preparation method thereof
  • Thermo-sensitive condom based on waterborne polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Preparation of water-based polyurethane thermosensitive condom 01:

[0107] Table 1

[0108]

[0109]Prepare water-based polyurethane heat-sensitive condom according to the formula of above-mentioned table 1, and its specific operation steps are as follows:

[0110] (1) Preparation of water-based polyurethane emulsion:

[0111] R1: During the polymerization reaction, polyether diol A (PTMG3000), polyether diol B (PTMG1000), and polyester diol (PBA2000) of different molecular weights are added according to the ratio, equipped with agitator, thermometer and nitrogen protection device In the reaction kettle, stir and heat up to 80-120°C, vacuum dehydration for 60-120 minutes, then cool down to 50-60°C, add dehydrated non-ionic hydrophilic chain extender N-120 and cross-linking agent CAPA3091, Add diisocyanate (IPDI and HMDI), and organic bismuth catalyst BiCAT81180.56g (accounting for 0.06% by weight based on the solid content of polyurethane emulsion), heat up to 80-...

Embodiment 2

[0118] Preparation of water-based polyurethane thermosensitive condom 02:

[0119] Table 2

[0120]

[0121] Prepare water-based polyurethane heat-sensitive condom according to the formula of above-mentioned table 2, and its specific operation steps are as follows:

[0122] (1) Preparation of water-based polyurethane emulsion:

[0123] R1: During the polymerization reaction, polyether diol A (PTMG3000 and PTMG2000), polyether diol B (PTMG650), and polyester diol (PBA2000) with different molecular weights are added according to the ratio and equipped with agitator, thermometer and nitrogen. In the reaction kettle of the protective device, stir and heat up to 80-120°C for vacuum dehydration for 60-120 minutes, then cool down to 50-60°C, add diisocyanate (IPDI and HMDI), and organic bismuth catalyst BiCAT81180.66g (accounting for The solid content of polyurethane emulsion is 0.06% by weight), heated up to 80-90°C, reacted for 90 minutes under stirring and nitrogen protection...

Embodiment 3

[0128] Preparation of water-based polyurethane thermosensitive condom 03:

[0129] table 3

[0130]

[0131] Prepare water-based polyurethane heat-sensitive condom according to the formula of above-mentioned table 3, and its specific operation steps are as follows:

[0132] (1) Preparation of water-based polyurethane emulsion:

[0133] R1: During the polymerization reaction, polyether diol A (PTMG3000), polyether diol B (PTMG1000), and polyester diol (PBA2000) of different molecular weights are added according to the ratio, equipped with agitator, thermometer and nitrogen protection device In the reaction kettle, stir and heat up to 80-120°C, vacuum dehydration for 60-120 minutes, then cool down to 50-60°C, add dehydrated non-ionic hydrophilic chain extender N-120, add diisocyanate (IPDI and HDI), and organotin catalyst TMG 218, 0.39g (0.04% by weight percentage of polyurethane emulsion solid content), warming up to 80-90 ° C, under stirring and nitrogen protection, react...

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Abstract

The invention provides a thermo-sensitive condom based on waterborne polyurethane and a preparation method thereof. The preparation method of the thermo-sensitive condom comprises the following steps:(1) taking polyester diol, low-molecular-weight polyether glycol and high-molecular-weight polyether glycol as soft segments, taking diisocyanate and a chain extender as hard segments, carrying out aprepolymerization reaction, and carrying out a chain extension reaction, a cross-linking reaction and an emulsification process to obtain a polyurethane aqueous emulsion, wherein the number-average molecular weight of the low-molecular-weight polyether glycol is 400-1000, the number-average molecular weight of the high-molecular-weight polyether glycol is 2000-5000, and the use amount of the polyester glycol accounts for not more than 5% of the total weight of solids in the aqueous emulsion; and (2) subjecting the aqueous polyurethane emulsion to dipping molding, hemming drying and demoldingso as to obtain the thermo-sensitive condom. The thermo-sensitive condom has the advantages of low modulus, soft product, high somatosensory comfort, thorough elimination of foreign body sensation, excellent tensile strength, safety guarantee, and difficult damage.

Description

technical field [0001] The invention belongs to the technical field of contraceptives, and in particular relates to a heat-sensitive condom based on water-based polyurethane and a preparation method thereof. Background technique [0002] Condoms prevent conception in a non-drug form and are the most commonly used contraceptive tool in the world. my country began to include condoms in free distribution in 1974 [1] . According to incomplete statistics, the annual consumption of condoms in China is nearly 12 billion. At present, condoms are not only a tool for family planning, but also one of the most effective ways to prevent the spread of sexually transmitted diseases. With the rapid spread of sexually transmitted diseases such as AIDS, the situation of AIDS prevention and treatment is becoming increasingly severe, and people's demand for condoms is increasing. At the same time, with the progress of society, people's pursuit of comfort and safety of condom products is getti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/72C08G18/66C08G18/48C08G18/42C08G18/40C08G18/12C08G18/32C08G18/34C08J7/06C08J5/18C08J5/02C08L75/04A61F6/04
CPCA61F6/04C08G18/12C08G18/32C08G18/34C08G18/4018C08G18/42C08G18/4808C08G18/6625C08G18/722C08G18/73C08G18/755C08G18/758C08J5/02C08J5/18C08J7/06C08J2375/04C08G18/3206C08G18/348C08G18/3228
Inventor 叶恒刘灯旺谭遂丹
Owner 四川尤博瑞新材料有限公司
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