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Thermal insulation material prepared by degrading waste polyurethane, and preparation method of thermal insulation material

A thermal insulation material, polyurethane technology, applied in the field of recycling and reuse of chemical materials, can solve the problems of resource waste, low foaming strength, and low product recycling rate, and achieve the effects of no three wastes, enhanced strength, and good fluidity

Pending Publication Date: 2021-11-02
SHANGHAI HECHENG POLYMER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Defects of polyurethane elastomer degradable materials for preparing thermal insulation materials are low foaming strength, limited use, and low product recycling rate
In the patent (CN104672414 A), a method for preparing polyurethane insulation materials from waste polyurethane elastomers is mentioned, and the utilization rate of waste polyurethane elastomers does not reach 100%, resulting in waste of resources

Method used

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  • Thermal insulation material prepared by degrading waste polyurethane, and preparation method of thermal insulation material
  • Thermal insulation material prepared by degrading waste polyurethane, and preparation method of thermal insulation material
  • Thermal insulation material prepared by degrading waste polyurethane, and preparation method of thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Take appropriate papermaking black liquor, acidify it, precipitate lignin, filter, wash, dry and pulverize.

[0052] Take 2g of lignin, add 20g of polyol PEDA-1500, 50g of 1,3-propanediol, 2g of potassium hydroxide, 2g of maleic anhydride, 1g of ethylene oxide, and react in a closed reactor at 150°C for 3 hours to obtain modified lignin sexual fluid.

[0053] Add 80g of polyether-based waste polyurethane elastomer to the reaction kettle, add 3g of sucrose and 1g of glucose, and stir for 5 hours under airtight conditions at 175°C to prepare polyether polyol degradation solution A.

[0054] Add 75g of polyester-based waste polyurethane elastomer to the reaction kettle, add 5g of triethylene glycol, and stir for 6 hours under airtight conditions at 150°C to prepare polyester polyol degradation solution B.

[0055] 11g polyether polyol degradation solution A, 12g polyester polyol degradation solution B, 8g HFC-245fa, 0.5g silicone oil L-600, 0.1g PC-41, 0.1g water were sti...

Embodiment 2

[0057] Take appropriate papermaking black liquor, acidify it, precipitate lignin, filter, wash, dry and pulverize.

[0058] Take 3g of lignin, add 50g of polyol GR-4110A, 30g of polyol GR-649, 30g of 1,9-nonanediol, 3g of potassium hydroxide, 1g of maleic anhydride, and react in a closed reactor at 175°C for 3 hours to obtain lignin Primer modifier.

[0059] Add 100g of polyether-based waste polyurethane elastomer to the reaction kettle, add 5g of diethylaminoethanol (DEAE), 1g of glucose, and stir for 2 hours under airtight conditions at 185°C to prepare polyether polyol degradation solution A.

[0060] Add 90g of polyester-based waste polyurethane elastomer to the reaction kettle, add 3g of glycerin and 2g of isosorbide, and stir for 3 hours under airtight conditions at 130°C to prepare polyester polyol degradation solution B.

[0061]Take 10g polyether polyol degradation solution A, 9g polyester polyol degradation solution B, 7g HCFC-22, 0.3g silicone oil CGY-5, 0.3g triet...

Embodiment 3

[0063] Take appropriate papermaking black liquor, acidify it, precipitate lignin, filter, wash, dry and pulverize.

[0064] Take 3g of lignin, add 50g of diethylene glycol, 30g of 1,5-pentanediol, 30g of PEDA-1500, 1.5g of magnesium hydroxide, 2g of propylene oxide, and react in a closed reactor at 180°C for 4.5 hours to obtain a modified lignin sexual fluid.

[0065] Add 110 g of polyether-based waste polyurethane elastomer to a reaction kettle, add 3 g of sucrose and 1 g of glycerin, and stir for 2 hours under airtight conditions at 190° C. to prepare polyether polyol degradation solution A.

[0066] Add 130g of polyester-based waste polyurethane elastomer to the reaction kettle, add 3g of triethylene glycol and 2g of phthalic anhydride, and stir for 4 hours under airtight conditions at 150°C to prepare polyester polyol degradation solution B.

[0067] 9g polyether polyol degradation solution A, 10g polyester polyol degradation solution B, 5g HCFC-11, 0.4g silicone oil DC-1...

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PUM

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Abstract

The invention relates to a thermal insulation material prepared by degrading lignin and waste polyurethane, and a preparation method thereof. According to the method, firstly, lignin extracted from a papermaking waste liquid is subjected to alkalization treatment, then a blending system of old polyurethane elastomer and lignin subjected to alkalization treatment is degraded, recovered and reused, no three wastes are discharged in the recovering process, and the environment is protected. According to the invention, the prepared rigid polyurethane thermal insulation product has excellent performances of high compression strength, good elasticity, good thermal stability, good thermal insulation performance and the like; the recycling rate of the waste polyurethane elastomer is close to 100%, the cost of a polyurethane rigid foam product is greatly reduced, a new practical way is opened up for the application of recycling the waste polyurethane elastomer to prepare polyhydric alcohol; and the performance of the polyurethane recycled material is modified by utilizing the excellent structure of lignin, so that a new way is opened up for the utilization of lignin extracted from papermaking waste liquid.

Description

technical field [0001] The invention belongs to the field of recovery and reuse of chemical materials, and in particular relates to a thermal insulation material prepared by degrading lignin and waste polyurethane and a preparation method thereof. Background technique [0002] Since Professor Bayer discovered in 1937 that polyisocyanate and polyol polyaddition reaction can produce polyurethane, and based on this for industrial application, polyurethane products have attracted more and more attention. With the advancement of science and technology, polyurethane products have become more and more popular in people's lives. Because polyurethane has superior physical and chemical properties, it is widely used in many fields such as automobile manufacturing, transportation, civil engineering, light industry, textile, electromechanical, petrochemical, aerospace, water conservancy and so on. And also developed many new polyurethane products. [0003] The polyurethane industry is ...

Claims

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Application Information

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IPC IPC(8): C08G18/64C08G18/48C08G18/42C08J11/24C08J11/28C08G101/00C08L75/08C08L75/06
CPCC08G18/4081C08G18/6492C08G18/4018C08G18/48C08G18/42C08J11/24C08J11/28C08G2101/00C08G2110/0025C08J2375/08C08J2375/06Y02W30/62
Inventor 赵朝阳顾晓华齐文斌董雨磊刘思雯吕士伟
Owner SHANGHAI HECHENG POLYMER TECH CO LTD
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