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A kind of nano antibacterial polyurethane composition and preparation method thereof

A polyurethane and composition technology, which is applied in the field of antibacterial polymer preparation, can solve the problems of lack of antibacterial and bactericidal properties, reduced toughness and tear strength, and affected use performance, etc. high effect

Active Publication Date: 2016-06-29
DONGGUAN JIXIN POLYMER SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the TPU material is a new type of material with broad market prospects, but because the TPU material itself does not have antibacterial and bactericidal properties, it cannot be widely used in some fields with high antibacterial requirements, although there are some in the prior art. Materials with antibacterial agents added to the polyurethane composition, but their antibacterial performance is poor, especially for common Escherichia coli and Staphylococcus aureus. Toughness and tear strength decrease, which seriously affects the performance of the entire polyurethane elastomer material. Therefore, it is necessary to provide a thermoplastic polyurethane elastomer material with high antibacterial function, high yellowing resistance, high transparency, and good elasticity and toughness. large market value

Method used

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  • A kind of nano antibacterial polyurethane composition and preparation method thereof
  • A kind of nano antibacterial polyurethane composition and preparation method thereof
  • A kind of nano antibacterial polyurethane composition and preparation method thereof

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preparation example Construction

[0043] Provide the concrete preparation method of nano antibacterial polyurethane composition of the present invention below, comprise the following steps:

[0044] Step 1, according to the modified inorganic nano antibacterial agent prepared by the above method, and take by weighing 1-5 parts by weight in predetermined units;

[0045] Step 2. Vacuum dehydrate 50-90 parts of polyester polyol and 3-10 parts of polyether polyol at 100-130°C, then cool to 30-50°C, add 20-45 parts of isocyanate under rapid stirring, Then incubate at 70-90°C for 2 hours to synthesize an isocyanate-terminated prepolymer with a mass fraction of 5%;

[0046] Step 3, 1-5 parts by weight of the modified inorganic nano-antibacterial agent in step 1, the chain extender of 5-20 parts by weight, the above-mentioned anti-mildew additive of 1-2 parts by weight, the antioxidant of 0.1-2 parts by weight, 1-3 parts by weight of hydrolysis stabilizer, 1-3 parts by weight of flame retardant, 0.1-3 parts by weight...

Embodiment 1

[0052] The preparation method of the nano antibacterial polyurethane composition as the first preferred embodiment of the present invention is as follows:

[0053] (1), prepare modified inorganic nano antibacterial agent, silver and TiO 2 The powder is doped according to the weight ratio of 1:100, and the particle size of the doped powder is ground to between 15-25nm, and then the powder and isocyanate are dispersed in anhydrous toluene, and the amount of isocyanate is sufficient, Catalyzed by light and vibrated by ultrasonic waves for 10 minutes, and the miscellaneous gases were removed by multiple freezing; then the above mixture was placed on a magnetic stirrer and reacted at a constant temperature of 95°C for 6 hours. After the reaction, the product powder was separated by centrifugation and washed again with anhydrous toluene. Remove unreacted excess isocyanate, obtain the modified inorganic nano antibacterial agent with following structure:

[0054]

[0055] Finally,...

Embodiment 2

[0061] The preparation method of the nano antibacterial polyurethane composition as the second preferred embodiment of the present invention is as follows:

[0062] (1), prepare modified inorganic nano antibacterial agent, silver and TiO 2 The powder is doped according to the weight ratio of 1.6:100, and the particle size of the doped powder is ground to between 15-25nm, and then the powder and isocyanate are dispersed in anhydrous toluene, and the amount of isocyanate is sufficient, Catalyzed by light and vibrated by ultrasonic waves for 20 minutes, and the miscellaneous gases were removed by multiple freezing; then the above mixture was placed on a magnetic stirrer, and reacted at a constant temperature of 95°C for 6 hours. After the reaction, the product powder was separated by centrifugation and washed with anhydrous toluene again. Remove unreacted excess isocyanate, obtain the modified inorganic nano antibacterial agent with following structure:

[0063]

[0064] Fina...

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Abstract

The invention discloses a nano antibacterial polyurethane composition and a preparation method thereof. The nano antibacterial polyurethane composition is prepared by mixing the following components in parts by weight: 50-90 parts of polyester polyol, 3-10 parts of polyether polyol, 20-45 parts of isocyanate, 5-20 parts of a chain extender, 1-5 parts of a modified inorganic antibacterial agent, 1-2 parts of a moldproof additive, 0.1-2 parts of an antioxidant, 1-3 parts of a hydrolysis stabilizer, 1-3 parts of a fire retardant, 0.1-3 parts of a slipping agent, 0.2-3 parts of an anti-blocking agent and 1-20 parts of a filling agent. By innovating the modified inorganic antibacterial agent and innovatively adding the modified inorganic antibacterial agent into polyurethane prepolymer, the prepared nano antibacterial polyurethane composition is relatively good in antibacterial property, the antibacterial rates of escherichia coli and staphylococcus aureus are greater than 99%, and meanwhile the composition prepared from the components further has the technical advantages of high abrasion resistance, good elasticity and toughness, large hardness, high tearing strength and the like, so that the wide application of an antibacterial TPU material is greatly promoted.

Description

technical field [0001] The invention relates to the technology for preparing antibacterial polymers, in particular to a nanometer antibacterial polyurethane composition and a preparation method thereof. Background technique [0002] TPU (Thermoplastic polyurethanes) material is a kind of thermoplastic polyurethane elastomer material, which has the advantages of wide hardness range, wear resistance and oil resistance, transparency and good elasticity, so it is widely used in daily necessities, sporting goods, toys, decorative materials and other fields, and has gradually It is a trend to replace PVC to meet environmental protection requirements in more and more fields. Therefore, the TPU material is a new type of material with broad market prospects, but because the TPU material itself does not have antibacterial and bactericidal properties, it cannot be widely used in some fields with high antibacterial requirements, although there are some in the prior art. Materials with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/44C08G18/42C08G18/32C08G18/12C08K13/06C08K9/04C08K3/22C08K3/08
CPCC08G18/12C08G18/4018C08G18/6603C08G18/76C08K3/08C08K3/22C08K9/04C08K13/06C08K2003/0806C08K2003/2241C08G18/32
Inventor 王一良何建雄
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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