Polyester amides from linseed oil for protective coatings

Gast, L. E.; Schneider, Wilma J.; Cowan, J. C.

doi:10.1007/bf02646804

Cited by 41 publications

(24 citation statements)

References 4 publications

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“…[1][2][3] Generally, polyesteramide coatings are obtained by baking at and above 175°C. 4,5 To improve the physicomechanical and anticorrosive characteristics of baked coatings, we incorporated aluminum in the backbone of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Studies on urethane‐modified alumina‐filled polyesteramide anticorrosive coatings cured at ambient temperature

Ahmad

Ashraf

Hasnat

et al. 2001

J of Applied Polymer Sci

106

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ABSTRACT:Coatings prepared from polyesteramide resin synthesized from linseed oil, a renewable resource, have been found to show improved physicomechanical and anticorrosive characteristics. These properties are further improved when aluminum is incorporated in the polyesteramide resin. The coatings of this resin are generally obtained by baking at elevated temperatures. With a view toward the use of linseed oil, as a precursor for the synthesis of polyesteramide resins and to cure their coatings at ambient temperature, toluylene diisocyanate (TDI) was incorporated into polyesteramide and alumina-filled polyesteramide in varying proportions to obtain urethane-modified resins. The latter resins were found to cure at room temperature. The broad structural features of the urethane-modified polyesteramide and alumina-filled polyesteramide were confirmed by FTIR and 1 H-NMR spectroscopies. Scratch hardness; impact resistance; bending resistance; specular gloss; and resistance to acid, alkali, and organic solvents of the coatings of these resins were determined by standard methods. Physicomechanical and anticorrosive properties, specular gloss, and thermal stability of the urethane-modified alumina-filled polyesteramide coatings were found to be at higher levels among these resins. It was found that TDI could be incorporated in polyesteramide up to only 6 wt %, such that above this loading its properties started to deteriorate, whereas alumina-filled polyesteramide could take up to 10 wt % TDI. Explanation is provided for the increase in scratch hardness and impact resistance above 6 and 10 wt % addition of TDI in polyesteramide and alumina-filled polyesteramide, respectively, as well as for the decrease in flexibility and resistance to solvents, acid, and alkali of coatings of these resins above these limits of TDI addition.

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Section: Introductionmentioning

confidence: 99%

Studies on urethane‐modified alumina‐filled polyesteramide anticorrosive coatings cured at ambient temperature

Ahmad

Ashraf

Hasnat

et al. 2001

J of Applied Polymer Sci

106

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“…[62] Reaction between DLFA and 2,4-toluene diisocyanate at room temperature affords thermoplastic poly(urethane fatty amide) resins, which can be used as substitutes for alkyd and uralkyd resins in the field of corrosion protective paints and coatings. [63] Polyricinoleate diol, obtained from the transesterification of methyl ricinoleate with diethylene glycol, with an M n of 2580 712 www.chemsuschem.org has been reacted with 4,4'-diphenylmethane diisocyanate and 1,4-butanediol to prepare thermoplastic polyurethanes (TPUs) with soft segment weight concentrations (SSC) ranging from 40 to 70 %.…”

Section: Vegetable Oil-based Thermoplastic Polyurethanesmentioning

confidence: 99%

Recent Advances in Vegetable Oil‐Based Polyurethanes

2011

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Polyurethanes are among the most versatile polymers because of the wide range of monomers, particularly diols or polyols, that can be utilized in their synthesis. This Review focuses on the most recent advances made in the production of polyurethane materials from vegetable oils. Over the past several years, increasing attention has been given to the use of vegetable oils as feedstocks for polymeric materials, because they tend to be very inexpensive and available in large quantities. Using various procedures, a very broad range of polyols or diols and in some cases, poly- or diisocyanates, can be obtained from vegetable oils. The wide range of vegetable oil-based monomers leads to a wide variety of polyurethane materials, from flexible foams to ductile and rigid plastics. The thermal and mechanical properties of these vegetable oil-based polyurethanes are often comparable to or even better than those prepared from petroleum and are suitable for applications in various industries.

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“…Synthesis of N,N-bis(2-hydroxyethyl)soybean amide (HESA) [47] Diethanolamine (31.5 g, 0.3 mol) was placed in a round-bottomed flask fitted with a stirrer and dropping funnel. Sodium methoxide (0.19 g, 0.0035 mol) was added and the mixture was stirred at 115 8C until the sodium methoxide dissolved.…”

Section: Experimental Section Materialsmentioning

confidence: 99%

Soybean Oil–Isosorbide‐Based Waterborne Polyurethane–Urea Dispersions

Xia

Larock

2011

ChemSusChem

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A series of soybean oil-based amide diol-isosorbide waterborne polyurethane-urea (PUU) dispersions have been successfully prepared, with amounts of isosorbide ranging from 0 to 20 wt % of the total diol content. The thermal and mechanical properties of the resulting PUU films have been characterized by dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, and mechanical testing. The results reveal that the glass transition temperature is increased with increased amounts of isosorbide, and the mechanical properties are improved significantly with the incorporation of isosorbide. For example, the Young's modulus increases from 2.3 to 63 MPa and the ultimate tensile strength increases from 0.7 to 8.2 MPa when the isosorbide amount is increased from 0 to 20 wt %. The thermal stability decreases slightly with the incorporation of isosorbide. This work provides a new way of utilizing biorenewable materials, such as isosorbide and a soybean oil-based amide diol, for the preparation of high-performance polyurethane-urea coatings.

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Polyester amides from linseed oil for protective coatings

Cited by 41 publications

References 4 publications

Studies on urethane‐modified alumina‐filled polyesteramide anticorrosive coatings cured at ambient temperature

Studies on urethane‐modified alumina‐filled polyesteramide anticorrosive coatings cured at ambient temperature

Recent Advances in Vegetable Oil‐Based Polyurethanes

Soybean Oil–Isosorbide‐Based Waterborne Polyurethane–Urea Dispersions

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