Synthesis of bio-based polyurethane coatings from vegetable oil and dicarboxylic acids

Patil, Chandrashekhar K.; Rajput, Sandip D.; Marathe, Ravindra J.; Kulkarni, Ravindra D.; Phadnis, Hemant; Sohn, Daewon; Mahulikar, Pramod P.; Gite, Vikas V.

doi:10.1016/j.porgcoat.2016.11.024

Cited by 85 publications

(55 citation statements)

References 37 publications

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“…The gloss values of PU coatings were observed in the range of 73–100 at an angle of 60°. Gloss was found to be higher for the samples containing more amount of fatty acid, which is in good agreement with previous report …”

Section: Resultssupporting

confidence: 93%

“…Whereas in the preparation of PU coatings in addition to polyol, MDI a diisocyanate component was used that had petroleum origin. Hence, the final PU has shown slight petroleum‐based parts, which is far lower than the previous results . In comparing different PUs, the sequence of decrease in biobased content was found to be DAIPPU A > DAIPPU B > DAIPPU C. The sequence was obvious because polyol component increased with increase in their hydroxyl values and as a result required more diisocyanate to cure, which resulted in increase of nonrenewable component in the given sequence.…”

Section: Resultsmentioning

confidence: 65%

“…The chemical resistance of coatings in acid, alkali, xylene (solvent), and water was evaluated and the results are given in Table and Figure . The resistance of PU against acid medium was found to be average, that is, with increase in the isosorbide content, acid resistance decreased may be due to the reduction of long‐chain fatty acid composition in the resultant PU . The alkali resistance of all the coatings was found to be appropriate as slight losses in gloss was observed for DAIPPU A and B, while more loss in gloss was observed in the case of DAIPPU C because of hydrolysis nature of isosorbide …”

Section: Resultsmentioning

confidence: 96%

“…The prepared coatings were neither peeled out nor possessed any crack on the surface. Thus, all the prepared PUs passed the flexibility test successfully because of the presence of long‐chain fatty acid part of the diacid, which is seen to be responsible for imparting the flexibility in the resultant material …”

Section: Resultsmentioning

confidence: 97%

“…Although the preparation of biobased polyols is reported number of times, their biobased content was <100% . Therefore, still there is requirement of partial petroleum component and demands to prepare fully biobased polyols.…”

Section: Introductionmentioning

confidence: 99%

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Fully biobased polyester polyols derived from renewable resources toward preparation of polyurethane and their application for coatings

Khanderay

Gite

2019

J of Applied Polymer Sci

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Renewable resources such as isosorbide and dimer acid were used to prepare fully biobased polyester polyols and polyurethane (PU) coatings. The structural features of polyester polyols were studied by end‐group analysis and spectroscopic methods. Then polyols were utilized in the preparation of PU coatings by reacting with diisocyanate. The prepared PU coatings were tested for both mechanical and chemical testings, which involved gloss, cross‐cut adhesion, pencil hardness, anticorrosion performance by immersion and Tafel plot methods, and chemical resistance against water, solvent, and acid media. The prepared PUs were also tested for their thermal stability using a thermogravimetric analyzer and surface morphology by a scanning electron microscopy. Tested mechanical properties, chemical resistance, and thermal stability results demonstrated that the renewable sources used in the preparation of PU coatings can be good substitutes over petroleum resources. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47558.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fully biobased polyester polyols derived from renewable resources toward preparation of polyurethane and their application for coatings

Khanderay

Gite

2019

J of Applied Polymer Sci

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Recent Developments in Bio‐Based Materials for Controlled‐Release Fertilizers

Laohhasurayotin¹,

Yiamsawas²

2022

High‐Performance Materials From Bio‐based Feedstocks

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Recent Trends in Waterborne and Bio‐Based Polyurethane Coatings for Corrosion Protection

Luna

2022

Adv Materials Inter

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polyurethanes. Different approaches have been identified for the realization of green PUs, which include-but are not limited to-renewability of the starting materials, sustainability of the synthesis itself, isocyanate-free formulations, and reduction of VOC emissions by limiting the use of organic solvents. [4] In particular, the present review deals with recent researches on two classes of green PUs, namely waterborne and bio-based formulations, focusing on their application as coatings to protect metal surfaces from corrosion. As such, manuscripts specifically addressing the synthesis and/or standard chemicophysical characterization of newly proposed formulations were not considered here. Readers interested in the synthetic aspects of green PUs can refer to recent comprehensive reviews on the topic. [5][6][7][8][9] In the following the recent relevant literature published since 2015 is critically reviewed, highlighting the main strategies pursued to develop reliable and highly performing anticorrosion coatings based on waterborne and bio-based PUs. Then, the collected data on their protective performances are discussed. Waterborne CoatingsWaterborne polyurethanes (WB-PUs) stepped out in the early 1990s driven by the increasingly strict environmental legislation in North America and Europe. [3] The use of sole water evidently solves the issue related to the huge VOC emission associated with traditional solvent-based coatings. In addition, the presence of water as one of the components removes the possibility of any toxic unreacted isocyanate in the system. [9] The introduction of hydrophilic groups in the formulation is essential to guarantee the stability of WB-PU dispersions. [10] On the other hand, it also detrimentally impacts the waterresistance of the resulting coating, hampering the full exploitation of this class of materials for anticorrosion purposes. Playing with the rich PU chemistry is clearly one possible way to tailor the coating properties, including water resistance and thus anticorrosion ability. [11][12][13] Both the polyol and the diisocyanate used for polyurethane synthesis can indeed be properly selected to maximize the coating protective efficacy. In this perspective, Li et al. found that a balanced polyether/polyester polyol ratio is optimal for anticorrosion applications. [12] Yu et al., instead, focused on the role of the diisocyanate structure, highlighting that the protective ability of WB-PU synthesized with 4,4′-dicyclohexylmethane diisocyanate outperforms Polyurethanes (PUs) have been extensively exploited for the production of protective coatings thanks to the versatility of their chemistry, which allows to adjust the coating properties depending on the final application. In the last decade, the concerns on the negative impact on the environment and human health of traditional petroleum-based and solvent-borne PUs have fostered the research on more environmentally friendly alternatives. This review article provides an overview of the recent approaches that have been profitably pu...

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Synthesis of bio-based polyurethane coatings from vegetable oil and dicarboxylic acids

Cited by 85 publications

References 37 publications

Fully biobased polyester polyols derived from renewable resources toward preparation of polyurethane and their application for coatings

Fully biobased polyester polyols derived from renewable resources toward preparation of polyurethane and their application for coatings

Recent Developments in Bio‐Based Materials for Controlled‐Release Fertilizers

Recent Trends in Waterborne and Bio‐Based Polyurethane Coatings for Corrosion Protection

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