From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating

Devesh Sane; Neel Godbole; Debarati Maity; Anagha Sabnis

doi:10.1007/s10118-026-3720-8

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From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating

RESEARCH ARTICLE | Updated：2026-09-23

- From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating
- From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating
- Chinese Journal of Polymer Science 2026年44卷第10期页码：3340-3354
- Affiliations：
  
  Department of Polymer & Surface Engineering, Institute of Chemical Technology Nathalal Parekh Marg, Matunga (E), Mumbai-400019, India
- Author bio：
  
  as.sabnis@ictmumbai.edu.in
- Funds：
  
  This work was financially supported by the Department of Science & Technology (DST), GOI under its INSPIRE program (No. IF240233). We are thankful to Covestro India Pvt. Ltd., Mumbai, for providing the isocyanates and Jay Elastomers Pvt., Navi Mumbai, India for providing the elastomeric waste.;The authors declare no interest conflict.The related data of this paper is data that should not be shared and can be obtained from the author for reasonable reasons. The author’s contact information as.sabnis@ictmumbai.edu.in.
- DOI：10.1007/s10118-026-3720-8
  中图分类号：
- 收稿：2026-02-23，
  
  录用：2026-04-19，
  
  网络首发：2026-07-01，
  
  纸质出版：2026-10-05
- Accepted：
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Sane, D.; Godbole, N.; Maity, D.; Sabnis, A. From waste to coatings: acidolysis of polyurethane elastomers with itaconic acid for polyurethane coating. Chinese J. Polym. Sci. 2026, 44, 3340–3354

Devesh Sane, Neel Godbole, Debarati Maity, et al. From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating[J]. Chinese Journal of Polymer Science, 2026, 44(10): 3340-3354.
Sane, D.; Godbole, N.; Maity, D.; Sabnis, A. From waste to coatings: acidolysis of polyurethane elastomers with itaconic acid for polyurethane coating. Chinese J. Polym. Sci. 2026, 44, 3340–3354 DOI： 10.1007/s10118-026-3720-8.

Devesh Sane, Neel Godbole, Debarati Maity, et al. From Waste to Coatings: Acidolysis of Polyurethane Elastomers with Itaconic Acid for Polyurethane Coating[J]. Chinese Journal of Polymer Science, 2026, 44(10): 3340-3354. DOI： 10.1007/s10118-026-3720-8.

摘要

Polyurethane elastomer waste was depolymerized using itaconic acid in a glycol-free system to obtain hydroxyl-functional oligomers. The reaction parameters governed the chemical functionalities. The recycled oligomers were directly utilized for coating formulations

demonstrating an efficient

simplified route for polyurethane (PU) waste valorization.

Abstract

This study explored the chemical recycling of polyurethane (PU) elastomers

via

acidolysis using itaconic acid and dimethylformamide (DMF) as the solvent without the use of glycol. The depolymerization process was optimized by varying the reaction parameters

and the resulting oligomers were analyzed using end-group analysis. PU coatings were formulated using recovered oligomers and isocyanates derived from isophorone diisocyanate (IPDI)

hexamethylene diisocyanate (HDI)

and toluene diisocyanate (TDI). Analytical techniques including differential scanning calorimetry (DSC)

thermogravimetric analysis (TGA)

Fourier-transform infrared spectroscopy (FTIR)

electrochemical impedance spectroscopy (EIS)

and gel permeation chromatography (GPC) were used for characterization. TDI based coatings exhibited superior optical

mechanical

chemical

thermal

and anticorrosive performance over the HDI and IPDIbased coatings. This study successfully showcased a facile method for recycling of PU waste along with PU coating formulations from 100% recycled oligomers

showcasing the use of recycled polyols in high performance applications.

关键词

Keywords

references

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