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Fluorine-containing polyurethane porous membrane and preparation method thereof

A technology of porous membrane and polyurethane, applied in the field of fluorine-containing polyurethane porous membrane and its preparation, can solve the problems of easy inhalation of water and affecting the service life, etc.

Active Publication Date: 2021-06-25
ANHUI HECHEN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional polyurethane materials have insufficient weather resistance and water resistance. In recent years, they have also been used as fine polishing materials for electronic display screens in the polishing process of display glass in electronic products such as flat panels. Pad, because it needs to use a large amount of small molecule surfactants to form a porous membrane, the polyurethane porous membrane with strong polarity is easy to absorb water, which seriously affects the service life

Method used

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  • Fluorine-containing polyurethane porous membrane and preparation method thereof
  • Fluorine-containing polyurethane porous membrane and preparation method thereof
  • Fluorine-containing polyurethane porous membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A fluorine-containing polyurethane porous membrane, comprising the following raw materials in parts by weight:

[0048] 20 parts of fluorine-containing diol, 0.01 part of dibutyltin dilaurate, 10 parts of 4,4-diphenylmethane diisocyanate, 10 parts of butyl acetate, 10 parts of cyclohexanone, 10 parts of xylene, additives 0.20.6 parts and 1 part of carbon black;

[0049] The fluorine-containing polyurethane porous membrane is prepared through the following steps:

[0050] The first step, mix fluorine-containing diol and dibutyltin dilaurate, stir for 30 minutes to obtain the first component; mix 4,4-diphenylmethane diisocyanate, butyl acetate, cyclohexanone and xylene Stir for 30min to obtain the second component;

[0051] The second step is to mix and stir the first component and the second component for 8 minutes, add additives and carbon black, grind at 50°C for 1 hour, and then perform defoaming treatment to obtain a polyurethane dispersion;

[0052] Step 3: Pour ...

Embodiment 2

[0068] A fluorine-containing polyurethane porous membrane, comprising the following raw materials in parts by weight:

[0069] 40 parts of fluorine-containing diol, 0.02 parts of dibutyltin dilaurate, 30 parts of 4,4-diphenylmethane diisocyanate, 15 parts of butyl acetate, 15 parts of cyclohexanone, 15 parts of xylene, additives 0.4 parts and 1.5 parts of carbon black;

[0070] The fluorine-containing polyurethane porous membrane is prepared through the following steps:

[0071] The first step, mix fluorine-containing diol and dibutyltin dilaurate, stir for 30 minutes to obtain the first component; mix 4,4-diphenylmethane diisocyanate, butyl acetate, cyclohexanone and xylene Stir for 35min to obtain the second component;

[0072] The second step is to mix and stir the first component and the second component for 9 minutes, add additives and carbon black, grind at 55 ° C for 1.5 hours, and then perform defoaming treatment to obtain a polyurethane dispersion;

[0073] Step 3:...

Embodiment 3

[0089] A fluorine-containing polyurethane porous membrane, comprising the following raw materials in parts by weight:

[0090] 60 parts of fluorine-containing diol, 0.03 parts of dibutyltin dilaurate, 40 parts of 4,4-diphenylmethane diisocyanate, 20 parts of butyl acetate, 20 parts of cyclohexanone, 20 parts of xylene, additives 0.6 parts and 2 parts of carbon black;

[0091] The fluorine-containing polyurethane porous membrane is prepared through the following steps:

[0092] The first step, mix fluorine-containing diol and dibutyltin dilaurate, stir for 30 minutes to obtain the first component; mix 4,4-diphenylmethane diisocyanate, butyl acetate, cyclohexanone and xylene Stir for 40min to obtain the second component;

[0093] The second step is to mix and stir the first component and the second component for 10 minutes, add additives and carbon black, grind at 60 ° C for 2 hours, and then perform defoaming treatment to obtain a polyurethane dispersion;

[0094] Step 3: Po...

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Abstract

The invention discloses a fluorine-containing polyurethane porous membrane, which is prepared from the following raw materials in parts by weight: 20 to 60 parts of fluorine-containing dihydric alcohol, 0.01 to 0.03 part of dibutyltin dilaurate, 10 to 40 parts of 4, 4-diphenylmethane diisocyanate, 10 to 20 parts of butyl acetate, 10 to 20 parts of cyclohexanone, 10 to 20 parts of xylene, 0.2 to 0.6 part of auxiliaries and 1 to 2 parts of carbon black. The preparation method of the fluorine-containing polyurethane porous membrane comprises the following steps: step 1, mixing fluorine-containing dihydric alcohol and dibutyltin dilaurate to obtain a first component; mixing the 4, 4-diphenylmethane diisocyanate, the butyl acetate, the cyclohexanone and the xylene to prepare the second component; 2, mixing and stirring the first component and the second component, adding the auxiliary agent and the carbon black, grinding, and defoaming to obtain a polyurethane dispersion; and 3, pouring the polyurethane dispersion into a polytetrafluoroethylene template to form a film, thereby obtaining the fluorine-containing polyurethane porous film.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fluorine-containing polyurethane porous membrane and a preparation method thereof. Background technique [0002] As a polymer material with excellent physical and mechanical properties, polyurethane has the advantages of good flexibility, cold resistance, water resistance, and organic solvent resistance, and is the most widely used polymer material. Polyurethane is a block copolymer formed by soft segments and hard segments. By adjusting the proportion of polyurethane block components to change its elasticity, hardness and hydrophilicity, the prepared polyurethane film has high tensile strength, toughness, waterproof, breathable, and durable. Excellent properties such as aging resistance, so it is widely used in medical and health, special clothing, and industrial neighborhoods such as aircraft parts, safety bulletproof glass, etc. [0003] Polyurethane h...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08L75/04C08J9/30C07C269/02C07C271/24C07C271/60C07C41/16C07C43/178C07C41/18C07C41/24C07C43/13
CPCC08G18/3831C08J9/30C07C269/02C07C41/16C07C41/18C07C41/24C08J2375/04C07C271/24C07C271/60C07C43/1785C07C43/1786C07C43/135
Inventor 李加海李元祥杨惠明
Owner ANHUI HECHEN NEW MATERIAL CO LTD
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