Flame-retardant polyurethane material and preparation method thereof

A polyurethane material and a flame-retardant technology, applied in the field of flame-retardant polyurethane materials and their preparation, can solve the problems of polyurethane water absorption defects that cannot be improved, single phosphorus-containing flame retardant, low flame retardant efficiency, etc., and achieve reduced performance. The effect of reducing, improving hydrophobicity and improving flame retardant performance

Inactive Publication Date: 2021-01-29
东阳市聚冉电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The flame-retardant polyurethane materials prepared by the existing technology mostly use a single phosphorus-containing flame retardant, the flame-ret

Method used

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  • Flame-retardant polyurethane material and preparation method thereof
  • Flame-retardant polyurethane material and preparation method thereof
  • Flame-retardant polyurethane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038]Example 1

[0039](1) Put 40g of polytetrahydrofuran, 10g of 6-heptene-2,4-diol, and 0.1g of hydroquinone into the reactor, and heat to 80r / min while stirring.oC. Vacuum to -0.04Mpa, keep it for 3h, remove the moisture in the alcohol, then pass nitrogen to normal pressure, cool down, add 20g of hexamethylene diisocyanate, 0.01g of bis(dodecylthio) two Tin tin, heat to 50oC, react for 4h, lower the temperature to obtain the prepolymer;

[0040](2) Add 1g 1,4-butanediol, 5g spirodihydroindene monomer, 5g methacryloyl ethoxy phosphate, 0.1g free radical initiator to the prepolymer, and heat while stirring at 200r / min. To 50oC, react for 3h, vacuum to -0.04, hold for 3h, remove bubbles, then pour the reaction liquid into the mold, 100oC continues to react for 8h, and the temperature is reduced to 50oC cured for 48h to obtain a flame-retardant polyurethane material.

[0041]Further, the preparation method of the spirodihydroindene monomer is:

[0042]Under the protection of nitrogen, mix 19g o...

Example Embodiment

[0044]Example 2

[0045](1) Add 45.7g of polypropylene glycol, 11.6g of androstene glycol, and 0.3g of 1,4-diquinone to the reactor, and heat to 89.6 while stirring at 200r / min.oC, evacuate to -0.06Mpa, keep for 2.4h, remove the moisture in the alcohol, then blow in nitrogen to normal pressure, cool down, add 21.2g of biuret triisocyanate, 0.03g of tetramethylguanidine, and heat to 57.4oC, react for 3.5h, lower the temperature to obtain the prepolymer;

[0046](2) Add 1.7g 1,4-bishydroxyethoxybenzene, 5.9g spirodihydroindene monomer, 6.1g ethylene glycol methacrylate phosphate, 0.3g free radical initiator to the prepolymer, 200r / min while stirring and heat to 54.6oC, react for 2.6h, vacuum to -0.06, hold for 2.3h, remove bubbles, and then pour the reaction liquid into the mold, 105.2oC continues to react for 6.9h, and the temperature drops to 47.4oC cured for 42.1h to obtain a flame-retardant polyurethane material.

[0047]Further, the preparation method of the spirodihydroindene monomer is...

Example Embodiment

[0050]Example 3

[0051](1) Add 48.7g of polycarbonate diol, 13.9g of 6-heptene-2,4-diol, and 0.5g of 2-tert-butyl hydroquinone to the reactor, and stir at 200r / min. While heating to 102oC, vacuumize to -0.08Mpa, keep for 2h, remove the moisture in the alcohol, then blow in nitrogen to normal pressure, cool down, add 23.6g 1,5-naphthalene diisocyanate, 0.05g stannous oxalate, and heat to 64.4oC, react for 2.8h, and lower the temperature to obtain the prepolymer;

[0052](2) Add 2.4g glycerol, 6.6g spiroindene monomer, 6.8g SPMA, 0.4g free radical initiator to the prepolymer, and heat to 57.9 while stirring at 200r / minoC, react for 2.1h, vacuum to -0.08, hold for 1.7h, remove bubbles, then pour the reaction liquid into the mold, 109.5oC continues to react for 5.8h, and the temperature drops to 44.7oC curing for 36.7h to obtain a flame-retardant polyurethane material.

[0053]Further, the preparation method of the spirodihydroindene monomer is:

[0054]Under the protection of nitrogen, mix 22g of...

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Abstract

The invention relates to a flame-retardant polyurethane material and a preparation method thereof. The preparation method comprises the following steps: (1) adding polyol, diol with double bonds and apolymerization inhibitor into a reaction kettle according to mass fraction, heating to 80-120 DEG C while stirring at 200r/min, vacuumizing to -0.04-0.1 Mpa, keeping for 1-3h, removing moisture in the alcohol, introducing nitrogen to normal pressure, cooling, adding a catalyst of diisocyanate, heating to 50-90 DEG C, reacting for 2-4 hours, and cooling to obtain a prepolymer; and (2) adding a chain extender, a spirobiindene monomer phosphorus-containing acrylate monomer and a radical initiator into the prepolymer, heating to 50-70 DEG C while stirring at 200r/min, reacting for 1-3h, vacuumizing to -0.04-0.1 Mpa, keeping for 1-3h, removing bubbles, injecting the reaction solution into a mold, continuously reacting for 4-8h at 100-130 DEG C, cooling to 40-50 DEG C, and curing for 24-48h toobtain the flame-retardant polyurethane material. The polyurethane material obtained by the invention has good flame retardant property and hydrophobic property, and can be used for preventing fire inthe use process and preventing the performance of the polyurethane material from being reduced due to water absorption in the long-term use process.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a flame-retardant polyurethane material and a preparation method thereof. Background technique [0002] Polyurethane material is a kind of polymer material with more carbamate functional groups in its molecular chain. It consists of soft segment and hard segment. With microphase separation, the soft segment provides toughness and the hard segment provides strength, resulting in polyurethane being A material with excellent comprehensive mechanical properties, due to its wide variety of raw materials, various polyurethane products can be prepared, including polyurethane foam, polyurethane adhesive, polyurethane elastomer, etc., with a wide range of applications. [0003] However, ordinary polyurethane has poor flame retardancy and cannot self-extinguish during use. Once a fire breaks out, it will seriously threaten the lives of the people; polyurethane materials contain more amide ...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F230/02C08F216/36
CPCC08F283/008C08F230/02C08F216/36
Inventor 斯惠仙吴尤嘉
Owner 东阳市聚冉电子科技有限公司
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