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A method for recycling polyurethane materials

A polyurethane material and polyurethane technology, applied in the field of recycling of industrial solid waste materials, can solve the problems that the economic value of waste polyurethane materials cannot be fully utilized, the types/sources of polyurethane materials that can be processed are few, and the capacity of polyurethane materials needs to be improved, so as to reduce production Cost and resource consumption, good industrial prospects, and the effect of improving the treatment effect

Active Publication Date: 2018-08-28
湖南智信酯业新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods are simple and easy to implement, they have poor economic benefits, low recycling value, and cannot make full use of the economic value of waste polyurethane materials, and have been gradually eliminated.
Although the alcoholysis method currently being actively researched and promoted has formed a certain scale of industrialization, judging from the existing research and industrialization status, there are generally disadvantages such as few types / sources of polyurethane materials that can be processed, complicated procedures, and high energy consumption of the device. The capacity of waste polyurethane materials needs to be improved

Method used

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  • A method for recycling polyurethane materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Treatment of Polyurethane Foam Polyurethane Material

[0031] Clean the surface of 30kg of waste polyurethane foam to remove inorganic impurities on the surface, and cut it into small pieces with a length less than 300mm.

[0032] A small piece of polyurethane foam was thrown into the reactor. Reactor volume is 0.1m 3 , with a heating jacket, heated by heat conduction oil, with a built-in stirring device. The reaction kettle was heated by heat conduction oil, and the temperature was controlled at 180° C., and the polyurethane foam was heated and dried for 25 minutes. The water content of the dried polyurethane foam was measured to be 0.5 wt%.

[0033] Add 10kg of 1,4-butanediol, 5kg of 1,4-cyclohexanediol, 0.1kg of lithium carbonate, 0.2kg of strontium carbonate and 0.05kg of octylated diphenylamine to the reactor, stir well, and keep the temperature in the reactor 180°C, reacted for 7 hours, cooled to 50°C, and discharged to obtain a light brown alcoholys...

Embodiment 2

[0034] Embodiment 2: the processing of the polyurethane material of the industrial scrap of polyurethane blanking diaphragm

[0035] Clean the surface of 30kg of industrial scraps of polyurethane punched diaphragms to remove inorganic impurities on the surface, and cut them into small pieces with a length of less than 300mm.

[0036] Put the industrial leftovers of small pieces of polyurethane punched diaphragms into the reactor. Reactor volume is 0.1m 3 , with a heating jacket, heated by heat conduction oil, with a built-in stirring device. The reaction kettle was heated by heat conduction oil, and the temperature was controlled at 190°C. The industrial scraps of polyurethane punched diaphragms were heated and dried for 20 minutes, and the industrial scraps of polyurethane punched diaphragms after drying were measured. The amount of water is 0.5 wt%.

[0037] Add 2-methylpropanediol 20kg, 2,2,4-trimethyl-1,3-pentanediol 10kg, lithium carbonate 0.2kg, strontium carbonate 0....

Embodiment 3

[0038] Embodiment 3: the processing of spandex yarn industrial waste polyurethane material

[0039] Clean the surface of 25kg spandex industrial waste to remove inorganic impurities on the surface, and cut it into small sections with a length less than 300mm.

[0040] Throw small pieces of spandex industrial waste into the reactor. Reactor volume is 0.1m 3 , with a heating jacket, heated by heat conduction oil, with a built-in stirring device. The reaction kettle was heated by heat-conducting oil, and the temperature was controlled at 190° C., and the spandex industrial waste was heated and dried for 20 minutes. The moisture content of the dried spandex industrial waste was measured to be 0.5 wt%.

[0041]Add 2-methylpropanediol 35kg, 2,2,4-trimethyl-1,3-pentanediol 10kg, lithium carbonate 0.1kg, strontium carbonate 0.25kg, N-methylmorpholine 0.01kg and 0.05kg of octylated diphenylamine, fully stirred, keeping the temperature in the reactor at 190°C, reacted for 6 hours, co...

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Abstract

The invention belongs to the technical field of industrial solid waste material recycling, and relates to a method for recovery and reuse of a polyurethane material. The method comprises the steps as follows: adding an alcoholysis agent, a catalyst and an alcoholysis assistant into the recycled polyurethane material, and heating for treating the polyurethane material. The method is capable of treating various types / sources of polyurethane materials, improving the processing efficiency, simplifying process, reducing energy consumption and preventing pollution, and facilitates the follow-up reuse of the recycled material.

Description

technical field [0001] The invention belongs to the technical field of recycling industrial solid waste materials, and relates to a method for recycling polyurethane materials. Background technique [0002] Polyurethane is a kind of synthetic resin material with various product forms and wide range of uses. It is widely used in transportation, construction, machinery, electronic equipment, furniture, food processing, textile and clothing, synthetic leather, printing, petrochemical, water conservancy, mining and metallurgy, national defense , medical and health, sports and other fields, has developed into the sixth largest synthetic material in the world. However, with the wide application of polyurethane materials, industrial production produces a large amount of leftovers, and waste polyurethane materials have become a new and important source of pollution. Therefore, the recycling and reuse of waste polyurethane materials is becoming more and more important in terms of re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/24C08L75/04
CPCC08J11/24C08J2375/04Y02W30/62
Inventor 刘斌刘立平
Owner 湖南智信酯业新材料有限公司
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