Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method for recycling waste polyurethane elastomer to prepare polyurethane insulation material

A polyurethane elastomer and thermal insulation material technology, which is applied in the field of waste polyurethane recycling and preparation of polyurethane thermal insulation materials, can solve the problems of decreased utilization rate, no content related to the recycling of waste polyurethane elastomer, complicated process, etc., so as to achieve clear problem solving and promote promotion Simple effect with application and processing technology

Active Publication Date: 2017-10-10
SHANGHAI HECHENG POLYMER TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the patent document (CN201410000590.8), it is proposed to use waste polyurethane foam to prepare high-quality activated carbon, which reduces the impact of waste polyurethane foam on the environment; Liquid polyurethane (PU) resin, so that it has higher peel strength and solvent resistance. However, the sources in the above patents are mainly waste polyurethane foam and polyurethane shoe soles, and do not involve the recycling of waste polyurethane elastomers.
In the patent (201310091432.3), it is proposed to use a mixture of ethylene glycol and ethanolamine as an alcoholysis agent, and use lithium acetate, sodium acetate or potassium acetate as a catalyst to cast a polyurethane elastomer at 145-195°C, and the reaction time is 5.5-6.5 h degradation, cooling the reactant until the upper layer becomes solid and the lower layer is still liquid, reacts the recovered upper layer solid with isocyanate to prepare thermoplastic polyurethane pellets; distills and purifies the recovered lower layer product to prepare rigid polyurethane foam However, the utilization rate of the degraded product will decrease due to the stratification of the recyclate after degradation. Moreover, the polyurethane foam must be prepared after distillation and purification in the process, which is relatively complicated.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for recycling waste polyurethane elastomer to prepare polyurethane insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Mix 10g of waste polyurethane elastomer with 8g of 1,3-propanediol and 1g of triethanolamine, stir at 100°C for 3 hours, and cool to room temperature to obtain the recovered product after degradation;

[0026] (2) 10g of the recovered product after degradation is mixed with 0.1g sucrose, 0.5g glucose, 4.5g HCFC-141b, 0.1g silicone oil L-600, 0.1gPC-41, 0.3g water, stir it evenly and use it as white material, and then mix with 10g PAPI -27 Stir 12S to make it foam, and cool to obtain polyurethane insulation material.

Embodiment 2

[0028] (1) Mix 10g of waste polyurethane elastomer with 7g of 1,3-butanediol and 2g of potassium hydroxide, stir at 150°C for 5 hours, and cool to room temperature to obtain the recovered product after degradation;

[0029] (2) 10g of the recovered product after degradation is mixed with 0.8g of sorbitol, 4.8g of HCFC-141b, 0.2g of silicone oil CGY-5, 0.2g of PC-41, and 0.4g of water as white material, and then stirred with 11g of PAPI-27 11S makes it foam and cools to obtain polyurethane insulation material.

Embodiment 3

[0031] (1) Mix 10g of waste polyurethane elastomer with 8g of 1,2-propanediol and 1g of sodium hydroxide, stir at 170°C for 2.5 hours, and cool to room temperature to obtain the recovered product after degradation;

[0032] (2) 10g of the recovered product after degradation and 0.3g of glucose, 4g of HCFC-141b, 0.5g of silicone oil CGY-5, 0.2g of TMPDA, and 0.1g of water are mixed uniformly and used as white material, and then stirred with 8.5g of PAPI-27 for 16S to make it Foaming and cooling to obtain polyurethane insulation material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thermal conductivityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method of preparing a polyurethane thermal insulation material by recovering a waste polyurethane elastomer. The method comprises the following steps: (1) mixing the waste polyurethane elastomer, an alcoholysis agent and an alcoholysis additive, stirring for 1-10h at the temperature to be 100-200 DEG C, cooling to room temperature, and degrading to obtain a recovery product; and (2) uniformly stirring the recovery product after degrading, a chain extender, a foaming agent, a foam stabilizer, a catalyst and water to be used as a white material, stirring the white material and a black material, foaming, and cooling to obtain the polyurethane thermal insulation material. The method is simple in processing process and easy to operate and can be put into production. According to the method disclosed by the invention, the thermal insulation performance of the product is excellent, the thermal conductivity reaches above 0.02W / m.K, and the apparent density, the water absorption, the compressive strength and the like of the polyurethane thermal insulation material all achieve the national standard.

Description

Technical field [0001] The invention belongs to the field of polyurethane elastomer waste recycling, and particularly relates to a method for preparing polyurethane thermal insulation materials by recycling waste polyurethane. Background technique [0002] Polyurethane elastomer is a polymer material with superior performance. It has light weight, wide range of hardness, high strength, large adjustable range of performance, wear resistance, oil resistance, excellent ozone resistance, shock absorption, radiation resistance and breathability. Good performance, diverse processing methods and wide applicability. It is widely used in military industry, aerospace, acoustics, biology and other fields. Among them, tires with high wear resistance; sleepers with light weight, good shock absorption, and aging resistance; not only extend the service life, but also reduce the noise of the operating environment, and the sieve plate used in coal plants with obvious energy saving and consumptio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/32C08G18/28C08G18/76C08J9/14C08J9/10C08G101/00
CPCC08G18/3206C08G18/3218C08G18/3281C08G18/7664C08G2101/00C08J9/144C08J9/147C08J2203/142C08J2375/04
Inventor 董雨磊顾晓华齐文斌赵朝阳李杨李美玲薛健张毅曾鹏
Owner SHANGHAI HECHENG POLYMER TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products