Flame-retardant bio-based polyurethane hose and production method thereof

A production method and bio-based technology, applied in the direction of hose, pipe, pipeline protection, etc., can solve the problems of casualties and other problems, and achieve the effect of excellent flame retardant performance

Active Publication Date: 2018-07-06
ZHONG YU HOSES TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The materials used in commonly used polyurethane hoses are flammable in the air without flame retardant treatment. For example, the oxygen index (LOI) of polyurethane is only about 18%, and the oxygen index (LOI) of polyester fiber is only about 21%; and Since the materials for preparing the hose need to add other additives, the hose is mostly incompletely burned during the combustion process, and a large amount of CO, NO, and NO will be released. 2 , HCHO, HCN and other toxic gases can easily cause casualties

Method used

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  • Flame-retardant bio-based polyurethane hose and production method thereof
  • Flame-retardant bio-based polyurethane hose and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A flame-retardant bio-based polyurethane hose, as attached figure 1 As shown, it includes the inner rubber layer 3, the outer rubber layer 2, and the tape reinforcement layer 1. The tape reinforcement layer 1 is woven from polyimide fibers, and the inner rubber layer 3 and the outer rubber layer 2 are bio-based polyurethane thermoplastic elastomer.

[0035] The production method of the above-mentioned flame-retardant bio-based polyurethane hose comprises the following steps:

[0036] (1) Soybean oil was blown into nitrogen and kept under mechanical stirring, heated to 180° C., and subjected to Diels Alder cyclization reaction for 6 hours to obtain thermally thickened oil.

[0037] (2) Add the mixed solvent obtained by mixing methanol and dichloromethane at a mass ratio of 45:55 into the heated thickened oil, and the flow rate of the feed is 1m 3 / min of ozone for oxidation reaction, the reaction temperature is -40 °C, use a cold trap to collect the reaction gas, when ...

Embodiment 2

[0044] The same structure as the flame-retardant bio-based polyurethane hose of embodiment 1, the difference lies in the production method, including the following steps:

[0045] (1) Soybean oil was blown into nitrogen and kept under mechanical stirring, heated to 210° C., and subjected to Diels Alder cyclization reaction for 5 hours to obtain thermally thickened oil.

[0046] (2) Add the mixed solvent obtained by mixing methanol and dichloromethane at a mass ratio of 45:55 into the heated thickened oil, and the flow rate of the feed is 1m 3 / min ozone for oxidation reaction, the reaction temperature is -30°C, the reaction gas is collected by cold trap, and the reaction is terminated when the liquid in the cold trap turns blue, and the reaction product A is obtained.

[0047] (3) The reaction product A is passed through nitrogen to remove the peroxide first, and then slowly added sodium borohydride to react for 15 minutes, and the reaction temperature is 0° C. to obtain the r...

Embodiment 3

[0053] The same structure as the flame-retardant bio-based polyurethane hose of embodiment 1, the difference lies in the production method, including the following steps:

[0054] (1) Soybean oil was blown into nitrogen and kept mechanically stirred, heated to 250° C., and subjected to Diels Alder cyclization reaction for 4 hours to obtain thermally thickened oil.

[0055] (2) Add the mixed solvent obtained by mixing methanol and dichloromethane at a mass ratio of 45:55 into the heated thickened oil, and the flow rate of the feed is 1m 3 / min of ozone for oxidation reaction, the reaction temperature is -35 ° C, use a cold trap to collect the reaction gas, when the liquid in the cold trap turns blue, the reaction is terminated, and the reaction product A is obtained.

[0056] (3) The reaction product A is passed through nitrogen to remove the peroxide first, and then slowly added sodium borohydride to react for 15 minutes, and the reaction temperature is 0° C. to obtain the rea...

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Abstract

The invention discloses a flame-retardant bio-based polyurethane hose. An inner rubber layer and an outer rubber layer are bio-based polyurethane thermoplastic elastic bodies, and a strip billet reinforcement layer is formed by weaving polyimide fibers. Meanwhile, a production method of the hose is disclosed. According to the bio-based polyurethane thermoplastic elastic bodies, soybean oil is adopted as initial raw materials, the thermal bodying (Diels Alder cyclization reaction) and ozonation/reduction technology relatively simple in process is applied in a cooperation manner, bio-based polyol containing high-reactivity primary hydroxyl is prepared, the polyurethane thermoplastic elastic bodies are prepared on the basis, and therefore existing petroleum-based polyol can be replaced; a flame retardant is added, mechanical performance degradation of the bio-based polyurethane thermoplastic elastic bodies is avoided, and meanwhile the flame-retardant performance of the bio-based polyurethane thermoplastic elastic bodies is improved; and the strip billet reinforcement layer is formed by weaving the self-flame-retardant polyimide fibers, and the hose has the excellent flame retardant performance.

Description

technical field [0001] The invention relates to a hose for transporting liquids and a production method thereof, in particular to a flame-retardant bio-based polyurethane hose and a production method thereof. Background technique [0002] Hoses for transporting liquids are widely used in firefighting, oil and gas exploration and other fields, and the hoses are required to have basic properties such as softness, wear resistance, high pressure resistance, and not easy to crack. Commonly used hoses, the reinforcing layer with blank is made of polyester fiber, nylon fiber and other braided layers, and the inner and outer rubber layers are made of polyurethane, rubber and other materials. [0003] Traditional polyurethane materials are prepared by polymerization of polyols and isocyanate compounds. The petroleum industry is currently the main source of obtaining polyols and isocyanate compounds. Due to the depletion of petroleum resources and the environmental pollution problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08F16L57/04C08G18/36C08K9/10C08K3/32C08K3/04
CPCC08G18/36C08K3/04C08K3/32C08K9/10C08K2003/323F16L11/08F16L57/04
Inventor 张小红黄裕中陈军申华王金马张竞
Owner ZHONG YU HOSES TECH CO LTD
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