Polyesteramides from linseed oil for protective coatings low acid‐value polymers

Abstract

Linseed and soybean diethanolamides, from the sodium alkoxide‐catalyzed reaction of the corresponding oil with diethanolamine, were used as diols to prepare a series of polyesteramides. The diols and dibasic acids or anhydrides were heated in refluxing xylene until the theoretical amount of water was collected in a trap. Low acid‐value linseed polymers were prepared with 10, 20, and 30 mole percent excess diol over the dibasic acid, and the effect of the excess diol on molecular weight, viscosity, and film properties of the polymers was examined. Polyesteramides which contained 10 mole percent excess fatty diethanolamide were made with 11 dibasic acids or anhydrides. The polymers were brown‐orange oils with Gardner viscosities of Z7 to >>Z10. Number‐average molecular weights ranged from 2,200 to 5,200. Data on drying characteristics, hardness, and chemical resistance of films were obtained. The better polymers air‐dried rapidly to give hard, glossy films (Sward rocker 20–60). Films baked at 190C for 10 min were softer than the corresponding air‐dried films. Xylene resistance of soybean and linseed polymer films was generally excellent, and alkali resistance was moderate. Soybean films showed the better alkali resistance.

Ambient‐cured polyesteramide‐based anticorrosive coatings from linseed oil—A sustainable resource

“…1,2 The petrochemicalbased monomers used in the manufacturing of polymers, due to their spiraling prices, high rate of depletion of petroleum stocks, as well as carcinogenicity, need to be replaced by polymers derived from sustainable and eco-friendly resources like vegetable seed oils. [3][4][5][6] N,N-bis-(2 hydroxyethyl) oil fatty amides have been used as monomer in the preparation of many oilbased polyesteramide (PEA) resins by reaction with dibasic acids or anhydrides.…”

“…[3][4][5][6] N,N-bis-(2 hydroxyethyl) oil fatty amides have been used as monomer in the preparation of many oilbased polyesteramide (PEA) resins by reaction with dibasic acids or anhydrides. 1,[7][8][9] Oil-based PEA resins containing repeating ester (-COOR) and amide (-CONR) units in the polymer chain possess improved characteristics over normal alkyds in terms of hardness, ease of drying, water vapor resistance, chemical and thermal resistance, as well as durability and other physicochemical properties. 7,10 -11 The high melting point, slight intractability, high drying temperature, and time cause difficulties in the application of PEA as coating materials.…”

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

“…[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.…”

Seed Oil Based Polyurethanes: An Insight

“…As the name suggests, FAD contains an amide group, with two hydroxyl ethyl groups directly attached to amide nitrogen along with the pendant aliphatic chain of SO. FAD is derived from different SO such as Linseed (Linum ussitassimum), Soybean (Glycine max), Karanj (Pongamia glabra), Nahor (Mesua ferrea), Jatropha (Jatropha Curcus), Olive (Olea europea), Coconut (Cocos nucifera) and others [20][21][22][23][24][25][26][27][28][29][30] (Figure 2). FAD is used as raw material for various polymers such as PU, poly (esteramide) and poly (ether amide).…”