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A kind of preparation method of polyurethane flame retardant coating based on nano-silicon carbide

A nano-silicon carbide, flame retardant coating technology, applied in polyurea/polyurethane coatings, fire-retardant coatings, coatings, etc., can solve problems such as flammability, and achieve good flame retardant performance, good adhesion fastness, and film formation. good performance

Active Publication Date: 2020-04-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, one weak point of polyurethane compared to other materials is its flammability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of polyurethane flame retardant coating based on nanometer silicon carbide, described coating is made through following steps:

[0023] (1) Mix 2mol polycarbonate diol (PCDL) (molecular weight: 500-1000) with 0.05-0.15% dibutyltin dilaurate (DBTDL), then add 4mol hexamethylene diisocyanate (HDI) dropwise, 80 Stir the reaction at ℃ for 2h;

[0024] (2) Add 0.6mol trimethylolpropane (TMP) to the reaction product obtained in step (1), and continue to react at 80° C. for 1 h;

[0025] (3) Add 1mol pentaerythritol triacrylate (PETA) to the reaction product obtained in step (2), continue to react for 0.5h, and obtain polyurethane resin;

[0026] (4) Mix 1kg of silicon carbide (SiC), 0.05kg of carbon fiber and 10kg of deionized water, stir for 0.5h, add 0.01kg of sodium carboxymethylcellulose and 0.01kg of polyvinyl alcohol, and add them to the ball mill for 300r Mix for 10 hours at a speed of 1 / min, remove the deionized water, and place it in a muffle furnace at 1000...

Embodiment 2

[0030] A kind of polyurethane flame retardant coating based on nanometer silicon carbide, described coating is made through following steps:

[0031] (1) Mix 4 mol polycarbonate diol (PCDL) (molecular weight 500-1000) with 0.05-0.15% dibutyltin dilaurate (DBTDL), then add 5 mol hexamethylene diisocyanate (HDI) dropwise, 65 Stir the reaction at ℃ for 4h;

[0032] (2) Add 0.9 mol trimethylolpropane (TMP) to the reaction product obtained in step (1), and continue to react at 65° C. for 2 h;

[0033] (3) Add 1.5mol pentaerythritol triacrylate (PETA) to the reaction product obtained in step (2), continue to react for 0.8h, and obtain polyurethane resin;

[0034] (4) Mix 1kg of silicon carbide (SiC), 0.1kg of carbon fiber and 10kg of deionized water, stir for 0.5h, add 0.01kg of sodium carboxymethylcellulose and 0.005kg of polyvinyl alcohol, and add it to the ball mill for 300r Mix for 10 hours at a speed of 1 / min, remove the deionized water, and place it in a muffle furnace at 10...

Embodiment 3

[0038] A kind of polyurethane flame retardant coating based on nanometer silicon carbide, described coating is made through following steps:

[0039] (1) Mix 3 mol polycarbonate diol (PCDL) (molecular weight 500-1000) with 0.05-0.15% dibutyltin dilaurate (DBTDL), then add 5 mol hexamethylene diisocyanate (HDI) dropwise, 70 Stir the reaction at ℃ for 3h;

[0040] (2) Add 0.7 mol trimethylolpropane (TMP) to the reaction product obtained in step (1), and continue to react at 70° C. for 1.5 h;

[0041] (3) Add 1.5mol pentaerythritol triacrylate (PETA) to the reaction product obtained in step (2), continue to react for 0.5h, and obtain polyurethane resin;

[0042] (4) Mix 1kg of silicon carbide (SiC), 0.01kg of carbon fiber and 10kg of deionized water, stir for 0.5h, add 0.005kg of sodium carboxymethylcellulose and 0.008kg of polyvinyl alcohol, and add them to the ball mill for 300r Mix for 10 hours at a speed of 1 / min, remove the deionized water, and place it in a muffle furnace...

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Abstract

The invention discloses a flame-retardant nanometer silicon carbide-based polyurethane coating. The flame-retardant nanometer silicon carbide-based polyurethane coating is prepared through the following steps: preparing polyurethane resin and a nanometer silicon carbide / carbon-fiber composite material; and mixing the olyurethane resin with the nanometer silicon carbide / carbon-fiber composite material, adding a dispersant and a leveling agent, and performing uniform stirring to prepare the flame-retardant nanometer silicon carbide-based polyurethane coating. The flame-retardant coating has theadvantages of stable components, good film forming performance, good flame retardation performance, economical and easily available raw materials, and simplicity in operation.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyurethane flame-retardant coating based on nano-silicon carbide and a preparation method thereof. Background technique [0002] Polymer materials are an important part of life today, and they are used in almost any field. Today, polymer materials are rapidly replacing traditional materials (such as metals, ceramics, etc.) and natural polymers (such as wood, cotton, natural rubber, etc.). Among them, polyurethane, as a coating polymer material with excellent performance, has been widely used in industrial and agricultural production, medicine and other fields. [0003] However, one weak point of polyurethane compared to other materials is its flammability. Therefore, most final products containing polymer materials (such as cables, carpets, furniture cabinets, etc.) must have satisfactory fire resistance to ensure public safety. Silicon carbide materials have bee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/18C09D7/61C08G18/66C08G18/44C08G18/32C08G18/67
CPCC08G18/3206C08G18/44C08G18/672C08K2201/011C08L2201/02C08L2205/035C09D5/18C09D7/61C09D7/70C09D175/04C08L29/04C08K7/06C08K3/34C08G18/6677
Inventor 姚伯龙王杰耿思瑶
Owner JIANGNAN UNIV
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