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Novel nano hybrid flame-retardant polyurethane elastomer and preparation method thereof

A polyurethane elastomer and nano-hybrid technology, which is applied in the field of novel nano-hybrid flame-retardant polyurethane elastomer and its preparation, can solve the problems of poor dispersion, limited improvement of polymer material performance, and weak interaction, etc., to achieve improved Load capacity, overcoming harmful substances and smoke, high efficiency effect

Pending Publication Date: 2020-11-03
HEFEI WANLI TIRE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, h-BN has stable chemical properties, almost no active groups on the surface, and weak interactions with most organic molecules and polymer molecular chains, so the dispersion in the polymer matrix is ​​very poor, which greatly limits h-BN. Improvement effect of BN on the properties of polymer materials

Method used

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  • Novel nano hybrid flame-retardant polyurethane elastomer and preparation method thereof
  • Novel nano hybrid flame-retardant polyurethane elastomer and preparation method thereof
  • Novel nano hybrid flame-retardant polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of nano-hybrid flame retardant:

[0030] (1) Take concentrated sulfuric acid and concentrated nitric acid solution and mix them at a volume ratio of 1:3 to obtain a concentrated acid solution. Take hexagonal boron nitride powder and place it in the concentrated acid solution, and ultrasonicate for 6 hours to obtain a light yellow viscous liquid;

[0031] (2) Reflux the light yellow viscous liquid oil bath obtained in step (1) at 80°C for 72 hours, wash, centrifuge, and freeze-dry to obtain surface-functionalized h-BN;

[0032] (3) The surface-functionalized h-BN obtained in step (2) was placed in deionized water and ultrasonically stirred for 30 minutes to obtain h-BN suspension;

[0033] (4) Add 0.85g of CuCl 2 Put into deionized water, stir until completely dissolved, add dropwise to step (3) to obtain h-BN suspension, stir ultrasonically for 1 hour, and then react under 60°C oil bath conditions for 12 hours to obtain a mixed solution;

[0034] (5) Put 0...

Embodiment 2

[0036] 44.4g of polyester polyol, 7.83g of TDI, 4.6g of MOCA, 1g of the novel nano-hybrid flame retardant prepared in Example 1, the novel nano-hybrid flame-retardant polyurethane elastomer was prepared according to the following method, and the specific preparation steps were:

[0037] (1) Dehydrate the polyester polyol in a reaction kettle at 110°C for 2 hours, then cool to 70°C, add TDI, heat up to 75°C, stir for 2 hours, and vacuum dehydrate at 80°C for 30 minutes to obtain a prepolymer;

[0038] (2) The nano-hybrid CuMoO 4 @h-BN is uniformly dispersed in an appropriate amount of acetone solution under ultrasonic conditions, then poured into the prepolymer, and stirred for 5 minutes under ultrasonic conditions at 75°C to form a uniform mixture;

[0039] (3) Add MOCA to the mixture, stir vigorously, pour into a mold, heat at 80°C for 6h, and heat at 120°C for 2h to obtain CuMoO 4 @h-BN / PUE is a new type of nano-hybrid flame-retardant polyurethane elastomer.

Embodiment 3

[0041] 45g of polyester polyol, 7.9g of TDI, 4.7g of MOCA, 0.5g of the novel nano-hybrid flame retardant prepared in Example 1, and prepare the novel nano-hybrid flame-retardant polyurethane elastomer according to the following method, the specific preparation steps are:

[0042] (1) Dehydrate the polyester polyol in a reaction kettle at 105°C for 1.7 hours, then cool to 67°C, add TDI, heat up to 72°C, stir for 2.3 hours, and vacuum dehydrate at 75°C for 45 minutes to obtain a prepolymer;

[0043] (2) The nano-hybrid CuMoO 4 @h-BN is uniformly dispersed in an appropriate amount of acetone solution under ultrasonic conditions, then poured into the prepolymer, and stirred for 5 minutes under ultrasonic conditions at 70°C to form a uniform mixture;

[0044] (3) Add MOCA to the mixture, stir vigorously, pour into a mold, heat at 75°C for 7h, and heat at 130°C for 2.5h to obtain CuMoO 4 @h-BN / PUE is a new type of nano-hybrid flame-retardant polyurethane elastomer.

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Abstract

The invention discloses a novel nano hybrid flame-retardant polyurethane elastomer, which mainly comprises the following components: 42.3-45 g of polyester polyol, 7-8.7 g of TDI, 4-5 g of MOCA and 0.5-1.5 g of a novel nano-hybrid flame retardant, wherein the nano hybrid flame retardant is CuMoO4 (at) hBN. The invention also discloses a preparation method of a novel nano hybrid flame-retardant polyurethane elastomer. According to the novel nano hybrid flame-retardant polyurethane elastomer prepared by the invention, the problem of poor dispersity of a nano material (h-BN) in a polymer processing process is improved, so that the h-BN is uniformly dispersed in a polymer matrix; the synergistic effect of multiple elements is achieved, and the flame retardant property and smoke suppression property of the polymer are more effectively improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a novel nano-hybrid flame-retardant polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomer (PUE) is a high-density polymer formed by co-reacting diisocyanate molecules such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) with macromolecular polyols and low molecular polyols (chain extenders). molecular material. PUE has good wear resistance, oil resistance and elasticity, and is widely used in various fields such as sporting goods, toys, and decorative materials. However, PUE can burn rapidly and produce a large amount of harmful substances and smoke under the condition of continuous heating, which are often the first to be produced in a fire, and they are the most dangerous harmful factors to human life safety. Therefore, while improving the flame retardancy of materials, flame retardants ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/66C08G18/42C08G18/32C08K9/02C08K9/12C08K3/38C08K3/22
CPCC08G18/10C08G18/42C08G18/6685C08K3/22C08K3/38C08K9/02C08K9/12C08K2003/2255C08K2003/385C08K2201/011C08G18/3814
Inventor 李爱娇李键陈佛国
Owner HEFEI WANLI TIRE CO LTD
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