Fluorinated polyurethane porous membrane

A polyurethane and porous membrane technology, applied in the direction of grinding workpiece supports, etc., can solve the problems of high surface activity, low water solubility, long hydrophobic chains, etc., and achieve the effect of slowing down rapid penetration, avoiding high water absorption, and excellent damping and anti-skid performance.

Active Publication Date: 2017-06-30
ANHUI HECHEN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, acryloyl bisquaternary ammonium salt has a long hydrophobic chain and high surface activity, and can be polymerized into a polymer surfactant at a certain temperature, making it have extremely high surface activity and low water solubility

Method used

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  • Fluorinated polyurethane porous membrane
  • Fluorinated polyurethane porous membrane
  • Fluorinated polyurethane porous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Prepared by dissolving 8.000g of fluorine-containing polyester polyurethane (hardness 95A) and 68.775g polyether polyurethane (hardness 85A) with a fluorine content of 1% in 307.100g N,N-dimethylformamide (DMF) at room temperature into a polyurethane solution with a concentration of 20%, then add 2.400g carbon black, 0.200g acryloyl diquaternary ammonium salt, then add 0.005g benzoyl peroxide, 0.500g hydrophilic surfactant, 0.120g Leveling agent, and supplemented with 612.9g DMF, then the solution of the composition was ground at 50°C for 1.2 hours, and the resulting solution was subjected to defoaming treatment to obtain a fluorine-containing polyurethane resin composition with a concentration of 8.00% and a viscosity of 500 centipoise .

[0050] Coat the fluorine-containing polyurethane resin composition on the base material or mold, immerse in a coagulation bath containing 10% DMF and 90% water for coagulation and regeneration, wash and dry to obtain a fluorine-conta...

Embodiment 2

[0054] Dissolve 25.000g of fluorine-containing polyether polyurethane (hardness 85A) and 69.700g polycarbonate polyurethane (hardness 90A) with a fluorine content of 2% in 378.800g N,N-dimethylformamide (DMF) at room temperature Prepare a polyurethane solution with a concentration of 20%, then add 5.000g carbon black, 0.300g acryloyl diquaternary ammonium salt, then add 0.005g benzoyl peroxide, 0.500g hydrophilic surfactant, 0.150g leveling agent, and supplemented with 520.545g DMF, then the solution of the composition was ground at 50°C for 1.5 hours, and the resulting solution was subjected to defoaming treatment to obtain a fluorine-containing polyurethane resin composition with a concentration of 10.07% and a viscosity of 850 centigrade moor.

[0055] Coat the fluorine-containing polyurethane resin composition on the base material or mold, immerse in a coagulation bath containing 10% DMF and 90% water for coagulation and regeneration, wash and dry to obtain a fluorine-cont...

Embodiment 3

[0059] Dissolve 50.000g of fluorine-containing polycarbonate polyurethane (90A hardness) and 92.000g polyester polyurethane (95A hardness) with a fluorine content of 3% in 568.000g N,N-dimethylformamide (DMF) at room temperature Prepare a polyurethane solution with a concentration of 20%, then add 8.000g carbon black, 0.400g acryloyl diquaternary ammonium salt, add 0.006g benzoyl peroxide, 0.800g hydrophilic surfactant, 0.220g leveling agent, and supplemented with 280.574g DMF, then the solution of the composition was ground at 50°C for 1.5 hours, and the resulting solution was subjected to defoaming treatment to obtain a fluorine-containing polyurethane resin composition with a concentration of 15.10% and a viscosity of 1250 centimeters moor.

[0060] Coat the fluorine-containing polyurethane resin composition on the substrate or mold, immerse in a coagulation bath containing 10% DMF and 90% water for coagulation and regeneration, wash and dry to obtain a fluorine-containing ...

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Abstract

The invention relates to a fluorinated polyurethane porous membrane. The structure of the porous membrane sequentially comprises a surface adsorption layer, a first foaming layer, a second foaming layer, a third isolating layer and a fourth foaming layer from top to bottom; the surface adsorption layer is a compact layer; both the first foaming layer and the second foaming layer are of drop-shaped porous structures; drop-shaped holes of the second foaming layer are larger than those of the first foaming layer; the thickness of the first foaming layer is 40 to 200 [mu]m; the thickness of the second foaming layer is 180 to 980 [mu]m; the thickness of the third isolating layer is 5 to 160 [mu]m; the thickness of the fourth foaming layer is 100 to 800 [mu]m. A glass grinding adsorption mat provided by the invention has a unique structure and stronger hydrophobic property, so that the progress of a polishing solution infiltrating into the porous membrane can be retarded, heat generated in the polishing process can be well dissipated out, and the service life of the grinding adsorption mat can reach 50 to 60 hours; compared with a glass grinding adsorption mat prepared from a known polyurethane resin composition, the glass grinding adsorption mat disclosed by the invention has the advantage that the polishing service life is prolonged by 10 to 20 hours.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and their preparation, and in particular relates to a fluorine-containing polyurethane porous membrane. 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. In recent years, it has also been used as a fine polishing material for electronic display screens in the polishing process of display glass of flat panel and other electronic products. However, the display glass grinding and adsorption pads made of ordinary polyurethane materials need to use a large amount of small molecule surface activity to form a porous film. , so that the polyurethane porous membrane with strong polarity is easy to absorb polishing liquid and water, which seriously affects the service life of the ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08L75/04C08L33/24C08K3/04C08J9/34C08F120/60B24B41/06
CPCB24B41/06C08F120/60C08J9/34C08L75/04C08L75/06C08L75/08C08L2203/14C08L2203/16C08L2205/02C08L2205/03C08L33/24C08K3/04
Inventor 谭鸿李加海何成生李洁华
Owner ANHUI HECHEN NEW MATERIAL CO LTD
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