Glycolysis of polyurethane foams and elastomers

Borda, J M; Pásżtor, G.; Zsuga, Miklós

doi:10.1016/s0141-3910(00)00030-6

Cited by 106 publications

(64 citation statements)

References 20 publications

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“…In the process grinded polyurethane is decomposed with a 3:1 mixture of ethanol amine and ethylene glycolinanautoclaveinN 2 atmosphereat155-170 8C. [7] Some of the chemical reactions taking place are as follows:…”

Section: Methodsmentioning

confidence: 99%

Fire Retarded Insulating Sheets from Recycled Materials

Matko

Keszei

Csontos

et al. 2006

Macromolecular Symposia

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Summary: In this work we aimed at forming partially recycled polymer composites of appropriate mechanical properties and flame retardancy. Multilayer composite structures proved to be suitable to fulfill all of these requirements. Core-shell structures presented here contain two-component thermosets, i.e. epoxy, recycled polyurethane and polyisocyanurate, as matrices reinforced with waste fillers such as short basalt fibers and wood chips. Flame retardancy and mechanical properties of the core-shell structures were investigated by the conventional methods of characterization. The developed cost-effective multilayer composites can be applied as heat and sound insulating panels e.g. multifunctional sheets for construction or automotive industry.

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Section: Methodsmentioning

confidence: 99%

Fire Retarded Insulating Sheets from Recycled Materials

Matko

Keszei

Csontos

et al. 2006

Macromolecular Symposia

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“…They have worked on different fields of PU recycling [114][115][116]. The interest in glycolysis method made it as the main aim of recycling researches during the last decade [73,[117][118][119][120][121][122].…”

Section: Glycolysismentioning

confidence: 99%

Polyurethane Waste Reduction and Recycling: From Bench to Pilot Scales

Nikje

Garmarudi

Idris

2011

Designed Monomers and Polymers

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In this review, reports, patents and recently published papers and documents on polyurethane recycling, especially chemical recycling methods, are investigated in order to find an adequate method for waste reduction, protecting the environment and preventing waste land filling. The recycling of polyurethane has always posed unique challenges due to its wide variety of applications, from the industry to bio-based materials, namely, artificial organs. Mechanical regrinding is the oldest method in polyurethane waste recycling and the use of the regrind wastes as filler in the new formulations. Chemical recycling of polyurethanes by hydrolysis, aminolysis and glycolysis is for the most part considered economically uncompetitive compared to formulating with virgin raw materials. Also some thermochemical processes are utilized for PU recycling. Recycling has opened an effective and economic route for polyurethane waste treatment. Nonetheless, more research efforts are required in order to scale up the recycling methods.

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“…It also is one of the main refrigerator components serving as a heat insulating material [3,4] . In this scenario, is clear that the quantity of polyurethane waste is increasing and recycling has become an urgent and important issue [5] . The majority of this waste has no specific use and is dumped on landfill sites [6] .…”

Section: Introductionmentioning

confidence: 99%

“…Thermal decomposition of polyurethane also presents same problems; this process generates too many kinds of compounds [10] . The use of chemical decomposition of polyurethane in the recycling process appears as an interesting option, where a mixture of polyols and amines can be obtained and reused in the production of new foams [5][6][7][8][9][10] . Several chemicals recycling process such as, hydrolysis, aminolysis and glycolysis have been described as viable recovery process for polyurethane foams [8,11,12] .…”

Section: Introductionmentioning

confidence: 99%

Using different catalysts in the chemical recycling of waste from flexible polyurethane foams

Santos¹,

Carone²,

Dullius³

et al. 2013

Polímeros

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Due to their versatility, polyurethane (PU) foams have many different applications, such as sponges, filling materials in furniture, automotive seats and clothes, among others. It is also one of the main refrigerator components serving as a heat insulating material. As PUs find different application niches, they must be largely produced and, consequently, lots of waste are generated. In this work we intend to contribute to the recycle of this waste. The recovery of polyol from flexible polyurethane foams was carried out using the glycolysis process and testing different catalysts. Grounded polyurethane and a solvent, diethyleneglycol (DEG), were kept at 200 °C and under nitrogen atmosphere during three hours in the presence of a catalyst. All catalysts tested promoted the polyol mixture formation, with Zinc acetate producing the best depolymerization rate. The catalysts efficiency for the depolymerization reaction follows the order: DBTDL< BTO< HBTO< DEA ≈ Ba(Ac) 2 < MEA ≈ KAc< Zn(Ac) 2 .

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Glycolysis of polyurethane foams and elastomers

Cited by 106 publications

References 20 publications

Fire Retarded Insulating Sheets from Recycled Materials

Fire Retarded Insulating Sheets from Recycled Materials

Polyurethane Waste Reduction and Recycling: From Bench to Pilot Scales

Using different catalysts in the chemical recycling of waste from flexible polyurethane foams

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