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Polyurethane elastomer based on sulfur tetrafluoride modification, and preparation method thereof

A polyurethane elastomer and sulfur tetrafluoride technology, applied in the field of material chemistry, can solve the problems of affecting the surface properties of polyurethane, poor hydrophobicity of polyurethane, etc., and achieve the effects of good hardness, excellent water and solvent resistance, and increased fluorine content

Inactive Publication Date: 2017-03-29
WUXI YONGXING METAL HOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophobicity of polyurethane is poor. In the prior art, fluorine is introduced into polyurethane by blending and chemical reaction. However, the traditional method of directly physically blending fluorine-containing acrylate and polyurethane to obtain fluorine-containing polyurethane is now less used
And this method will affect the surface properties of polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A polyurethane elastomer based on sulfur tetrafluoride modification, which is made of the following components in proportion by weight: 21 parts of polyurethane, 16 parts of acrylate, 12 parts of isocyanate, 12 parts of hexafluorobutyl acrylate, tetrafluorobutyl 7 parts of sulfur dioxide, 4 parts of hexafluoropropanol, 7 parts of silicon carbide, 6 parts of magnesium oxide, 7 parts of montmorillonite, and 5 parts of talcum powder.

[0026] A preparation method based on sulfur tetrafluoride modified polyurethane elastomer, comprising the following steps:

[0027] (1) Matrix preparation: mix polyurethane and acrylate, add to internal mixer, blending temperature is 112°C, blending time is 8 minutes, after blending, place at 95°C for 8 hours; add stabilizer Continue blending with the plasticizer for 9 minutes at 110°C to obtain the matrix;

[0028] (2) Modifier preparation: mix sulfur tetrafluoride, hexafluoropropanol, silicon carbide, magnesium oxide, montmorillonite and ...

Embodiment 2

[0035] A polyurethane elastomer modified based on sulfur tetrafluoride, which is made of the following components in parts by weight: 36 parts of polyurethane, 32 parts of acrylate, 21 parts of isocyanate, 20 parts of hexafluorobutyl acrylate, tetrafluorobutyl 12 parts of sulfur dioxide, 8 parts of hexafluoropropanol, 12 parts of silicon carbide, 11 parts of magnesium oxide, 13 parts of montmorillonite, and 8 parts of talcum powder.

[0036] A preparation method based on sulfur tetrafluoride modified polyurethane elastomer, comprising the following steps:

[0037] (1) Matrix preparation: mix polyurethane and acrylate, add to internal mixer, blending temperature is 135°C, blending time is 18 minutes, after blending, place at 122°C for 11 hours; add stabilizer Continue to blend with the plasticizer at 128°C for 18 minutes to obtain the matrix;

[0038] (2) Modifier preparation: mix sulfur tetrafluoride, hexafluoropropanol, silicon carbide, magnesium oxide, montmorillonite and t...

Embodiment 3

[0045] A polyurethane elastomer based on sulfur tetrafluoride modification, which is made of the following components in proportion by weight: 43 parts of polyurethane, 39 parts of acrylate, 26 parts of isocyanate, 25 parts of hexafluorobutyl acrylate, tetrafluorobutyl 18 parts of sulfur dioxide, 11 parts of hexafluoropropanol, 18 parts of silicon carbide, 14 parts of magnesium oxide, 18 parts of montmorillonite, and 12 parts of talc powder.

[0046] A preparation method based on sulfur tetrafluoride modified polyurethane elastomer, comprising the following steps:

[0047] (1) Matrix preparation: mix polyurethane and acrylate, add to internal mixer, blending temperature is 145°C, blending time is 23 minutes, after blending, place at 130°C for 14 hours; add stabilizer Continue to blend with the plasticizer at 140°C for 22 minutes to obtain the matrix;

[0048] (2) Modifier preparation: mix sulfur tetrafluoride, hexafluoropropanol, silicon carbide, magnesium oxide, montmorillon...

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Abstract

The invention discloses a polyurethane elastomer based on sulfur tetrafluoride modification, and a preparation method thereof. The polyurethane elastomer is prepared from the following ingredients at a weight part ratio: 21-43 parts of polyurethane, 16-39 parts of acrylic ester, 12-26 parts of isocyanate, 12-25 parts of hexafluorobutyl acrylate, 7-18 parts of sulfur tetrafluoride, 4-11 parts of hexafluoride propyl alcohol, 7-18 parts of silicon carbide, 6-14 parts of magnesium oxide, 7-18 parts of montmorillonite and 5-12 parts of talcum powder. The polyurethane elastomer has the following advantages: (1) the fluorine content of the polyurethane elastomer based on the sulfur tetrafluoride modification is increased, a contact angle with water is increased, and surface tension is lowered; (2) the thermostability of the polyurethane elastomer disclosed by the invention is improved, and the polyurethane elastomer exhibits excellent water-resistance and solvent-resistance performance; and (3) the polyurethane elastomer keeps good hardness, breaking strength, elongation, storage modulus and surface performance.

Description

technical field [0001] The invention belongs to the field of material chemistry and relates to a thermoplastic elastomer, in particular to a sulfur tetrafluoride-based modified polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomers have excellent comprehensive properties. For general materials, hardness and elasticity often cannot be taken into account at the same time, and it is often a trade-off. However, polyurethane elastomers have a wide range of hardness, which can range from 10 degrees (Shore A hardness) to 75 degrees (Shore D hardness). ), while the common rubber hardness range is Shore A hardness of 60 degrees to 100 degrees. It is meaningful that polyurethane elastomer can maintain high elasticity in such a wide temperature range, with an elongation rate of 800% or even higher, while the highest hardness of natural rubber is Shore A at an elongation rate of 550%. The mold hardness is about 70 degrees. Polyo...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L33/04C08L33/14C08K13/02C08K5/29C08K3/30C08K5/05C08K3/34C08K3/22
CPCC08L75/04C08L2201/08C08L2205/02C08L2205/03C08L33/04C08L33/14C08K13/02C08K5/29C08K3/30C08K5/05C08K3/34C08K2003/222C08K3/346
Inventor 王铮
Owner WUXI YONGXING METAL HOSE
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