Advances in the field of nonisocyanate polyurethanes based on cyclic carbonates

Figovsky, Oleg; Shapovalov, L.; Leykin, A.; Birukova, O.; Potashnikova, R.

doi:10.23939/chcht07.01.079

Cited by 56 publications

(54 citation statements)

References 17 publications

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“…In this respect, the most popular alternative pathway is the polyaddition of bis-5-membered cyclic carbonates and diamines, a process leading to the formation of poly(hydroxy urethane)s (PHUs) bearing primary and secondary hydroxyls on the carbon chain. [5][6][7] Among the main advantages of this approach, beyond the non-utilization of diisocyanates, there is the possibility for CO 2 xation (if the 5-membered cyclic carbonate is obtained by reaction between epoxides and CO 2 ), and the improvement of the thermal and chemical resistance provided by the additional hydroxyl functionalities. Bio-based building blocks can be attained from a number of natural sources, such as vegetable oils, polyols, and phenols.…”

Section: Introductionmentioning

confidence: 99%

Utilization of cyclocarbonated lignin as a bio-based cross-linker for the preparation of poly(hydroxy urethane)s

et al. 2017

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In this work, cyclocarbonated modified lignin, the most abundant reservoir of aromatic moieties in nature, was used as a green bio-based cross-linker on polyhydroxy urethane formulations. As a preliminary study, a complete 13 C NMR characterization of the aminolysis products of cyclocarbonated lignin with 1,12diaminododecane was provided. The best reaction conditions found for the aminolysis reaction were applied for the preparation of thermoset resins. Cyclocarbonated lignin was then reacted with 1,12diaminododecane, acting as a chain extender, in the presence of poly(ethylene glycol) bis cyclic carbonate, a soft segment used to tune the resin properties. Different (total cyclocarbonates)/(total amines) equivalent ratios and diverse poly(ethylene glycol)/lignin stoichiometry were tested. The evolution in time of the molecular weight distribution of a selected composition was followed by gel permeation chromatography until the solubility in THF was appreciable. Moreover, some significant resin samples were subjected to DSC analysis to evaluate favourable changes in the glass transition temperature and compared to blank experiments that did not include lignin in the composition.

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Section: Introductionmentioning

confidence: 99%

Utilization of cyclocarbonated lignin as a bio-based cross-linker for the preparation of poly(hydroxy urethane)s

et al. 2017

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“…In the absence of isocyanate groups, NIPU does not enable foaming by liberation of CO 2 typical for isocyanate‐based PU preparation in the presence of water. Figovsky et al reported on epoxy/NIPU hybrid spray foam systems in which (un)saturated hydrofluorocarbons were employed as physical blowing agents . In a recent advance, Cornille et al cured a mixture of trimethylolpropane and polypropylene oxide glycidylether‐based cyclic carbonates with diamines in the presence of poly(methylhydrogenosiloxane) as chemical blowing agent .…”

Section: Introductionmentioning

confidence: 99%

Flexible and Bio‐Based Nonisocyanate Polyurethane (NIPU) Foams

Blattmann

Lauth

Mülhaupt

2016

Macro Materials & Eng

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The amine cure of cyclic carbonate blends, derived from renewable resources and carbon dioxide, in the presence of a liquid fluorohydrocarbon as physical blowing agent with no ozone depletion potential, enables the facile tailoring of flexible bio‐based nonisocyanate polyurethane (NIPU) foams. Unlike conventional PU foams, neither isocyanates nor phosgene or aromatic amines are required as intermediates in NIPU foaming. Typically, rigid cyclic carbonates such as carbonated trimethylolpropane glycidylether (TMPGC) are blended together with the corresponding flexible cyclic carbonate such as ethoxylated TMPGC (EO‐TMPGC) which lowers monomer viscosity and reactivity. This is reflected by higher pot life and gelation times for the cure with hexamethylene diamine (HMDA), improving NIPU foam processing. With increasing EO‐TMPGC content, rigid TMPGC/HMDA‐NIPU foams are rendered flexible and soft, as verified by simultaneously declining storage modulus and glass transition temperature. In this NIPU foam family, the TMPGC/EO‐TMPGC (60 wt%/40 wt%) blend cured with HMDA in the presence of Solkane 365/227 affords flexible NIPU foams exhibiting low density, very good mechanical hysteresis, and tailored hardness, meeting the demands of various applications like automotive seating. Emission tests confirm the absence of critical compounds mentioned in the global automotive declarable substance list.

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“…It has been demonstrated (Guan et al, 2011) that in manufacturing NIPU, the need for isocyanates, which are toxic, is eliminated, and this, in turn, eliminates the need for phosgene used in manufacturing isocyanates. Instead, NIPU is made by reacting polycyclic carbonates and polyamines (Figovsky et al, 2013d). This provides a method for preparing hydroxyl carbamate (Guan et al, 2011).…”

Section: Environmental Factor: Pu Productionmentioning

confidence: 99%

Greening Nigeria's economy for industrial and environmental sustainability: Polyurethane production as a test case

Momodu

Aransiola

Okunade

et al. 2019

Natural Resources Forum

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The study focused on Nigeria's polyurethane (PU) production process as a test case. Though it is currently insignificant when viewed from a global perspective, PU production in Nigeria is not eco‐friendly. Traditionally, PU is produced by reacting petro‐based polyol with a poly‐isocyanate, which is made from amines and phosgene and are currently imported into the country. These two materials are detrimental to the human health and environment, indicating that Nigeria's PU industries need to re‐examine their production inputs for environmental compliance. The objective of this study is to review the PU industry for nontoxic reagents that could be sourced locally vis‐à‐vis overcoming sustainable development (greening the economy) challenges in Nigeria. Non‐isocyanate polyurethane (NIPU) is preferred to petro‐polyurethane because, in comparison, NIPU has improved thermal and chemical resistance, porosity and water absorption, and is less toxic. Engaging local resources to produce PU is economically feasible; in addition, NIPU is relatively advantageous to human health and the environment. Aside from being economically feasible, production of NIPU in Nigeria has the propensity to greatly enlarge the growth of the existing PU industry to tremendous heights and contribute to diversifying and improving the overall economy.

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Advances in the field of nonisocyanate polyurethanes based on cyclic carbonates

Cited by 56 publications

References 17 publications

Utilization of cyclocarbonated lignin as a bio-based cross-linker for the preparation of poly(hydroxy urethane)s

Utilization of cyclocarbonated lignin as a bio-based cross-linker for the preparation of poly(hydroxy urethane)s

Flexible and Bio‐Based Nonisocyanate Polyurethane (NIPU) Foams

Greening Nigeria's economy for industrial and environmental sustainability: Polyurethane production as a test case

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