NDLI: Novel moisture-cured hyperbranched urethane alkyd resin for coating application

Content Provider	Springer Nature Link
Author	Naik, R. B. Malvankar, N. G. Mahato, T. K. Ratna, D. Hastak, R. S.
Copyright Year	2014
Abstract	A hyperbranched polyol (HBP) was synthesized using dipentaerythritol as a core material and 2,2-bis(methylol) propionic acid as a chain extender. This was reacted with varying concentrations of soya fatty acid to make hyperbranched alkyd (HBA) resins. The HBA resins containing unreacted hydroxyl groups were reacted with isophorone diisocyanate at NCO/OH ratio of 1.6:1 to make high solid hyperbranched urethane alkyd (HBUA) resins. The excess NCO content in the HBUA resins was used to cure with atmospheric moisture, and thus moisture-cured HBUA coatings were formed. The resins were characterized by FTIR, and $^{13}$C NMR spectroscopic analysis. A series of such resins were made using different fatty acid/isocyanate ratios with respect to the hydroxyl groups present in the HBP. The effect of compositions on the mechanical and weathering properties of the cured resins was investigated. It was observed that there was an optimum fatty acid–isocyanate ratio in terms of the requirements of solvent, mechanical and weathering properties of the resin. The requirement of solvents for formulating HBUA coatings is much lower compared to linear alkyd-based coatings. The present study reveals that the moisture-cured HBUA resins can be used as a binder material in the field of low-pollution weather-resistance coatings.
Starting Page	575
Ending Page	586
Page Count	12
File Format	PDF
ISSN	15470091
Journal	JCT Research
Volume Number	11
Issue Number	4
e-ISSN	19353804
Language	English
Publisher	Springer US
Publisher Date	2014-02-21
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hyperbranched polymer Fatty acid Isophorone diisocyanate Hyperbranched urethane alkyd Coating Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Polymer Sciences Industrial Chemistry/Chemical Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Colloid and Surface Chemistry Surfaces and Interfaces

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