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Polyurethane elastomer modified by using hydroxylation carbon nanotube and preparation method of polyurethane elastomer

A technology of polyurethane elasticity and polyurethane elastomer, applied in the field of polyurethane elastomer and its preparation, can solve the problems of difficulty in dispersion, large interfacial interaction force, poor compatibility, etc., and achieves improved storage time, enhanced mechanical properties and thermal stability. , to avoid the effect of polymerization

Inactive Publication Date: 2017-06-20
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the lack of polar groups on the surface of carbon nanotubes, it is difficult to disperse during processing and the interfacial interaction force between carbon nanotubes and polyurethane elastomers is large, resulting in poor compatibility between the two, and the obtained polyurethane elastomers are prone to cracking

Method used

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  • Polyurethane elastomer modified by using hydroxylation carbon nanotube and preparation method of polyurethane elastomer
  • Polyurethane elastomer modified by using hydroxylation carbon nanotube and preparation method of polyurethane elastomer
  • Polyurethane elastomer modified by using hydroxylation carbon nanotube and preparation method of polyurethane elastomer

Examples

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Effect test

Embodiment 1

[0041] A polyurethane elastomer modified by hydroxylated carbon nanotubes, by weight, comprises the following components:

[0042] Component A: 50 parts of polyoxypropylene ether glycol; 10 parts of isophorone diisocyanate; 2.3 parts of cyclohexanone oxime; 0.1 part of catalyst.

[0043] Component B: 3 parts of hydroxylated carbon nanotubes; 1 part of dispersant.

[0044] The preparation method comprises the following steps:

[0045] (1) Put 50 parts of polyoxypropylene ether glycol into the reaction kettle, vacuum dehydrate at 100°C for 2 hours, and cool down to 50°C;

[0046] (2) Put 10 parts of isophorone diisocyanate and 0.1 part of zinc isooctanoate into the reaction kettle, stir and heat up to 90°C for 3 hours, then cool down to 50°C;

[0047] (3) Put 2.3 parts of cyclohexanone oxime into the reaction kettle, stir and heat up to 70°C for 5 hours to obtain a closed polyurethane prepolymer;

[0048] (4) Mix the closed polyurethane prepolymer obtained in step (3) with 3 ...

Embodiment 2

[0050] A polyurethane elastomer modified by hydroxylated carbon nanotubes, by weight, comprises the following components:

[0051] Component A: 70 parts of polytetrahydrofuran diol; 17.5 parts of diphenylmethane diisocyanate; 3 parts of methyl ethyl ketone oxime; 0.2 parts of catalyst.

[0052] Component B: 4 parts of hydroxylated carbon nanotubes; 2 parts of dispersant.

[0053] The preparation method comprises the following steps:

[0054] (1) Put 70 parts of polytetrahydrofuran diol into the reaction kettle, vacuum dehydrate at 110°C for 2 hours, and cool down to 50°C;

[0055] (2) Put 17.5 parts of diphenylmethane diisocyanate and 0.2 parts of zinc acetylacetonate into the reactor, stir and heat up to 80°C for 3 hours, then cool down to 50°C;

[0056] (3) Put 3 parts of methyl ethyl ketone oxime into the reaction kettle, stir and heat up to 70°C for 4 hours to obtain a closed polyurethane prepolymer;

[0057] (4) Mix the closed polyurethane prepolymer obtained in step (...

Embodiment 3

[0059] A polyurethane elastomer modified by hydroxylated carbon nanotubes, by weight, comprises the following components:

[0060] Component A: 80 parts of polyethylene adipate; 18 parts of isophorone diisocyanate; 3.5 parts of methyl ethyl ketone oxime; 0.2 parts of catalyst.

[0061] Component B: 3 parts of hydroxylated carbon nanotubes; 2 parts of dispersant.

[0062]Its preparation method comprises the following steps:

[0063] (1) Put 80 parts of polyethylene adipate into the reaction kettle, vacuum dehydrate at 110°C for 2 hours, and cool down to 50°C;

[0064] (2) Put 18 parts of isophorone diisocyanate and 0.2 parts of stannous octoate into the reaction kettle, stir and heat up to 90°C for 3 hours, then cool down to 50°C;

[0065] (3) Put 3.5 parts of methyl ethyl ketone oxime into the reaction kettle, stir and heat up to 70°C for 4 hours to obtain a closed polyurethane prepolymer;

[0066] (4) Mix the closed polyurethane prepolymer obtained in (3) with 3 parts of h...

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Abstract

The invention provides a polyurethane elastomer modified by using hydroxylation carbon nanotubes and a preparation method of the polyurethane elastomer. The polyurethane elastomer comprises the following components in parts by weight: component A including 50-80 parts of macromolecule polyhydric alcohols, 10-20 parts of polyisocyanates, 1.5-1.7 parts of an oxime sealing agent, 0.1-0.5 part of a catalyst, component B including 3-5 parts of hydroxylation carbon nanotubes, and 1-2 parts of a dispersing agent. The surfaces of the hydroxylation carbon nanotubes comprise hydroxyl groups which can react with isocyanic acid radicals, so that the problem that the carbon nanotubes are poor in compatibility with polyurethane can be solved, the carbon nanotubes can be used as a cross-linking agent, the mechanical property and the thermal stability of the polyurethane elastomer can be improved, and meanwhile the polyurethane elastomer has conductivity and heat conduction.

Description

technical field [0001] The invention relates to the technical field of polyurethane elastomers, and specifically discloses a polyurethane elastomer modified by hydroxylated carbon nanotubes and a preparation method thereof. Background technique [0002] Polyurethane elastomer is a synthetic high polymer with excellent wear resistance, oil resistance, tear resistance, high strength and high elasticity. The Young's modulus is between rubber and plastic, and it is widely used in defense industry, light Textile industry, transportation rails, oil fields and mines and medical equipment and other fields. [0003] Due to the low thermal decomposition temperature of the chemical structure of polyurethane elastomers, polyurethane elastomers have disadvantages such as poor thermal stability and low softening temperature, and with the development of society, the application field has higher requirements for the performance of polyurethane elastomers. It is necessary to improve the per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42C08K9/04C08K7/24
CPCC08G18/4854C08G18/4238C08G18/4277C08G18/4825C08K7/24C08K9/04C08K2201/011
Inventor 郭文鹤赵春娥戴家兵李维虎冯林林汪飞
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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