Preparations and properties of castor oil urethane foams

Yeadon, David A.; McSherry, Wilbur F.; Goldblatt, L. A.

doi:10.1007/bf02540259

Cited by 23 publications

(4 citation statements)

References 2 publications

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“…Castor oil is a major renewable hydroxyl component used in polyurethane synthesis. The inherent presence of hydroxyl functional groups in its triricinolein fraction makes it an attractive plant derived renewable hydroxyl compound for polyurethane synthesis . However, triricinolein has limited reactivity with isocyanate functional groups due to several factors such as secondary functionality of hydroxyl groups, and steric effects of the dangling chain .…”

Section: Introductionmentioning

confidence: 99%

A pre‐polyaddition mediation of castor oil for polyurethane formation

Chandan

Edatholath

Unni³

et al. 2016

J of Applied Polymer Sci

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We report a simple, serendipitous, two step mediation that overcomes the polyaddition threshold of castor oil during polyurethane formation. The mediation facilitates formation of polyurethane systems directly from castor oil without triricinolein chain extension or the use of supplementary hydroxyl compounds. The mediation involves refluxing castor oil with n-Butyl lithium in the presence of a solvent followed by water addition. We demonstrate the effectiveness of this mediation by successfully generating two important polyurethane systems (foam and coating) from castor oil. We identify that the mediation introduces two new compounds in castor oil namely, a lithiated diglyceride and a lithium salt of fatty acid. We characterize the new polyurethane synthesized for their hard-soft segmented morphology, glass transition temperature, and thermomechanical properties. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43964.

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Section: Introductionmentioning

confidence: 99%

A pre‐polyaddition mediation of castor oil for polyurethane formation

Chandan

Edatholath

Unni³

et al. 2016

J of Applied Polymer Sci

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“…[21][22][23][24] Recently, bio-based polyols have been successfully developed from natural oils, [25][26][27] such as soybean oil, castor oil, palm oil, colza oil, and rubber seed oil, and a range of PU products have been synthesized. [28][29][30][31][32][33][34][35] However, except for L-lysine diisocyanates used for PU, 36 there are few reports on making rigid PU foams from polyols based on amino acid derivatives.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of a novel bio-based polyol for preparation of polyurethane foams

Fang

Tang

et al. 2014

New J. Chem.

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“…It is widely used for paints, coatings, inks, lubricants, and many other products. The oil is most suited for making polyurethane (PU) foams and some rigid and semirigid foams having potential uses in thermal insulation were produced from castor oil and its derivatives .…”

Section: Introductionmentioning

confidence: 99%

Water‐blown polyurethane–clay nanocomposite foams from biopolyol—effect of nanoclay on the properties

Palanisamy

2013

Polymer Composites

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The present work deals with the development of polyurethane–clay nanocomposite foams by replacing part of the synthetic polyol with castor oil derivative. Hydroxylated castor oil was converted into diethanol amide by transamidation and the resulting polyol was formulated into water‐blown foams. Modified montmorillonite clay was used as nanofiller in different amounts viz. 0.5%, 1.0%, 2.0%, and 5.0% by total weight of the foam formulation. Rheological measurements on the polyol–clay mixtures indicated that up to 1% clay loading there is no significant change in the viscosity with shear rate and beyond 2%, shear thinning occurred. X‐ray diffraction studies further substantiated these results. The effect of the modified clay on the density, mechanical properties such as compression strength, compression modulus, and microstructure of the foams were investigated. The filler thus added had a reinforcing effect on the foam as observed in the density and compression strength measurements. Differential scanning calorimetric studies on Tg and dynamic mechanical analyses on the modulus clearly indicated that 1% clay loading and above led to exfoliation and plasticizing effect. Exfoliated nanocomposites in compositions containing 1% clay and more yielded a much higher nucleation rate than intercalated ones leading to reduced cell size as observed by optical and scanning electron microscopy. Thus, castor oil, which is readily available, relatively inexpensive, and environmentally benign nonedible oil, has been successfully used to prepare filled semirigid foams which can find application in insulation and packing. POLYM. COMPOS. 34:1306–1312, 2013. © 2013 Society of Plastics Engineers

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Preparations and properties of castor oil urethane foams

Cited by 23 publications

References 2 publications

A pre‐polyaddition mediation of castor oil for polyurethane formation

A pre‐polyaddition mediation of castor oil for polyurethane formation

Synthesis and application of a novel bio-based polyol for preparation of polyurethane foams

Water‐blown polyurethane–clay nanocomposite foams from biopolyol—effect of nanoclay on the properties

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