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Application of a polyurethane degradation method and its degradation product in component B of plastic track

A technology of polyurethane and polyurethane elastomer, applied in the field of polyurethane, can solve the problems of complex process, high cost, many amine by-products, etc., and achieve the effects of simple process, low cost and reduced production cost

Inactive Publication Date: 2020-12-11
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the above-mentioned prior art problems of needing vacuuming, more amine by-products, complicated process and high cost, and provides a new method for degradation of polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1. The polyurethane elastomer waste material, benzoic anhydride and 4-dimethylaminopyridine are formulated into a polyurethane degradation system in a ratio of 100 parts by weight: 20 parts: 1 part;

[0033] S2. Heating the formulated degradation system to 200°C-210°C to obtain a polyurethane degradation product.

Embodiment 2

[0035] S1. The polyurethane elastomer waste material, benzoic anhydride and 1-hydroxybenzotriazole are formulated into a polyurethane degradation system in a weight ratio of 100 parts: 25 parts: 1 part;

[0036] S2. Heating the formulated degradation system to 200°C-210°C to obtain a polyurethane degradation product.

Embodiment 3

[0038] S1. The polyurethane elastomer waste material, succinic acid and 1-hydroxybenzotriazole are formulated into a polyurethane degradation system in a weight ratio of 100 parts: 20 parts: 1.5 parts;

[0039] S2. Heating the formulated degradation system to 200°C-210°C to obtain a polyurethane degradation product.

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PUM

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Abstract

The invention discloses a polyurethane degradation method and application of a degradation product thereof in a plastic track component B. The method is characterized in that a polyurethane elastomer is degraded by using organic acid as a degradation agent in the presence of a catalyst, and the obtained degradation product can be used instead of brand new polyether polyol in the polyurethane plastic track component B. According to the invention, the method does not need the use of a large amount of degradation agent and does not need vacuumizing; fractions in the degradation process are mainly moisture contained in the raw material; after degradation, amine byproducts are greatly reduced, so that no treating agent for the amine byproducts needs to be added, thereby achieving the purposes of reducing three wastes, improving the yield, simplifying the process and saving the cost; and the degradation product can be used completely instead of the brand new polyether polyol in the polyurethane plastic track component B, thereby greatly lowering the cost of a polyurethane plastic track mixed component.

Description

technical field [0001] The invention relates to the technical field of polyurethane, and more specifically relates to a method for degrading polyurethane and the application of its degradation product in component B of a plastic runway. Background technique [0002] At present, the publicly reported polyurethane degradation methods mainly include alcoholysis, hydrolysis, aminolysis, and alkaline hydrolysis, among which the most industrial value is alcoholysis. The basic reaction of the alcoholysis process is to use alkyl glycol as a degradation agent to break the carbamate group in polyurethane waste in the temperature range of 150-250 ° C, that is, the carbamate group and alkyl glycol In a transesterification reaction, the carbamate groups are replaced by short alcohol chains, releasing long chain polyols. Commonly used alcoholysis agents include ethylene glycol, diethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, polyethylene glyco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/26C08L75/04C08L91/06C08K5/18C08K3/34E01C13/06
CPCC08J11/26C08J2375/04C08L75/04C08L2207/20E01C13/065C08L91/06C08K5/18C08K3/34Y02W30/62
Inventor 吴光飞何晓辉
Owner SUN YAT SEN UNIV
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