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

1968 ◽  
Vol 45 (7) ◽  
pp. 534-536 ◽  
Author(s):  
L. E. Gast ◽  
Wilma J. Schneider ◽  
J. C. Cowan
Keyword(s):  
Protective Coatings ◽  
Linseed Oil ◽  
Acid Value

Relationship during Drying between the Acid Value of Linseed Oil and the concentration of Cobalt Acetate1

1926 ◽  
Vol 18 (12) ◽  
pp. 1229-1230
Author(s):  
Wm. Lloyd Evans ◽  
Paul E. Marling ◽  
Stewart E. Lower
Keyword(s):  
Linseed Oil ◽  
Acid Value

scholarly journals Linseed oil: Characterization and study of its oxidative degradation

2020 ◽  
Vol 71 (1) ◽  
pp. 337 ◽  
Author(s):  
B. M. Berto ◽  
R. K.A. Garcia ◽  
G. D. Fernandes ◽  
D. Barrera-Arellano ◽  
G. G. Pereira
Keyword(s):  
Fatty Acid ◽  
Oxidative Stability ◽  
Induction Period ◽  
Room Temperature ◽  
Linseed Oil ◽  
Oxidative Degradation ◽  
Acid Value ◽  
Quality Parameters ◽  
Time Intervals ◽  
Accelerated Oxidation

This paper proposes to characterize and monitor the degradation of linseed oil under two oxidation conditions using some traditional oxidative and quality parameters. The experimental section of this study was divided into 2 stages. In the first one, three commercial linseed oil samples (OL1, OL2, and OL3) were characterized according to oxidative stability (90 °C) and fatty acid composition. In the second stage, the OL1 sample, selected due to its availability, was subjected to the following oxidation procedures: storage at room temperature conditions with exposure to light and air (temperature ranging from 7 to 35 °C) for 140 days and accelerated oxidation at 100 °C for 7h. Samples were collected at different time intervals and analyzed for oxidative stability (90 °C), peroxide value, and acid value. The results showed that all the samples presented a similar fatty acid profile and that the OL3 sample showed a higher induction period (p < 0.05). Regarding the oxidative degradation, the induction period of the OL1 sample reduced from 9.7 to 5.7 and 9.7 to 6.3 during 140 days of storage under room temperature and 7 h of accelerated oxidation, respectively. The end of induction period of the OL1 sample is expected to occur within 229 days according to an exponential mathematical model fitted to the induction period values at different temperatures. In addition, the OL1 sample met the limits proposed by Codex and Brazilian regulations for peroxide and acid values during the oxidation time intervals.

Badanie stabilności oleju lnianego i oleju z czarnuszki

2018 ◽  
Vol 19 (3) ◽  
Author(s):  
Agata Pawłowska ◽  
Arkadiusz Kocur ◽  
Paweł Siudem ◽  
Katarzyna Paradowska
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Linseed Oil ◽  
Acid Value ◽  
Storage Conditions ◽  
Antioxidant Compounds ◽  
High Concentration ◽  
Black Cumin ◽  
Daily Diet ◽  
The Impact

Introduction. Because of high concentration of monounsaturated and polyunsaturated fatty acids plant oils are increasingly popular ingredient of daily diet. Polyunsaturated fatty acids, which are not synthetized in the human body, are particularly important, because they are necessary for regular functioning of nervous and cardiovascular systems. Linseed oil and black cumin oil could be the source of these acids, but while consuming them it is worth knowing how conditions and time of storage influence their properties. Aim. Examination of changes of properties of linseed oil and black cumin oil depending on storage conditions. Material and methods. For both oils were four types of samples: collected right after opening, stored for a month in refrigerator, stored in 40°C and heated in microwave to 137°C. For each type of sample acid value, peroxide number were determined by titration, optical density (in 232 and 270 nm) and DPPH inhibition were measured spectrophotometrically. Results. Based on a results of analysis of changes in linseed oil an black cumin oil we observed the impact of high temperature on promotion of oxidation processes in linseed oil, while the black cumin oil was stable. Conclusions. Linseed oil requires low temperature of storage and can not be used after heating. Black cumin oil is more stable because of antioxidant compounds contained in essential oil.

Linseed oil polyol/ZnO bionanocomposite towards mechanically robust, thermally stable, hydrophobic coatings: a novel synergistic approach utilising a sustainable resource

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47928-47944 ◽  
Author(s):  
Eram Sharmin ◽  
Obaid ur Rahman ◽  
Fahmina Zafar ◽  
Deewan Akram ◽  
Manawwer Alam ◽  
...  
Keyword(s):  
Protective Coatings ◽  
Linseed Oil ◽  
Thermally Stable ◽  
Hydrophobic Coatings ◽  
Green Approach ◽  
Synergistic Approach

Linseed polyol/ZnO bionanocomposite produced strong, well-adherent, flexibility-retentive, thermally stable, hydrophobic, “green” corrosion protective coatings via an in situ solventless “green” approach.

scholarly journals Effect of Natural Antioxidants on the Stability of Linseed Oil and Fish Stored under Anaerobic Conditions

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Kinga Śpitalniak-Bajerska ◽  
Antoni Szumny ◽  
Alicja Zofia Kucharska ◽  
Robert Kupczyński
Keyword(s):  
Fatty Acid ◽  
Linseed Oil ◽  
Natural Antioxidants ◽  
Acid Value ◽  
Apple Pomace ◽  
Fish Oils ◽  
Total Phenolic ◽  
Anaerobic Conditions ◽  
Apple Peels ◽  
The Stability

Vegetable and animal oils are susceptible to the oxidation of their lipid components on storage. Polyphenols from apple peels are investigated as potential natural antioxidants used for stabilizing polyunsaturated fatty acid and preventing oxidation. The aim of this study was assessing the antioxidant efficacy of apple pomace as natural antioxidant in linseed and fish oils, stored in anaerobic conditions. Apple pomace was added to the linseed and fish oils stored for eight weeks to evaluate the antioxidant activity of their polyphenolic components. The total phenolic content, activity of DPPH, ABTS•+, FRAP, acid value (AV), peroxide value (PV), and fatty acid profile were analyzed in storage tests. We found that apple pomace, regardless of the oil content of the formulation, was capable of blanking 2,2-diphenyl-1-picrylhydrazyl radicals. The highest ability to reduce Fe3+ ions occurred in the samples containing 30% of the fish oil. The use of apple pomace comprising polyphenolic compounds improves the stability of linseed and fish oils in storage tests. Polyphenols in apple pomace show a high antioxidant potential, as indicated by their values of DPPH, ABST•+, and FRAP. The addition of apple pomace resulted in limiting the acid and peroxide values of the samples during storage.

Polyester amides from linseed oil for protective coatings

1966 ◽  
Vol 43 (6) ◽  
pp. 418-421 ◽  
Author(s):  
L. E. Gast ◽  
Wilma J. Schneider ◽  
J. C. Cowan
Keyword(s):  
Protective Coatings ◽  
Linseed Oil

scholarly journals Self-Healing Epoxy Coating with Microencapsulation of Linseed Oil for the Corrosion Protection of Magnesium (Mg)

2021 ◽  
Vol 2129 (1) ◽  
pp. 012008
Author(s):  
J Alias ◽  
N A Johari ◽  
A Zanurin ◽  
N A Alang ◽  
M Z M Zain
Keyword(s):  
Corrosion Rate ◽  
Protective Coatings ◽  
Linseed Oil ◽  
Urea Formaldehyde ◽  
Epoxy Coating ◽  
The Self ◽  
Core Material ◽  
Resin Matrix ◽  
Self Healing ◽  
Magnesium Sheet

Abstract The ability to self-heal is an important feature for the long-term durability of protective coatings on metal alloys. Microcapsules in the self-healing coating allowed for automatic recovery of any damages or cracks, extending the life of the coating. In this study, self-healing microcapsules containing linseed oil as the core material and polyurea-formaldehyde (PUF) as the shell material were manufactured to epoxy resin matrix. Coatings were applied to a bare magnesium (Mg) substrate and scratched to test the self-healing ability. Optical and scanning electron microscopy (SEM) were used to characterize the microcapsules formed by varied stirring rates of 300 and 800 rpm. By using potentiodynamic polarization in a 3.5 wt.% NaCl solution, the corrosion rate of embedded microcapsules and coatings on Mg was evaluated, and the corrosion rate was studied using the Tafel plot. As a consequence, the epoxy coating containing linseed oil and urea formaldehyde, stirred at 800 rpm, significantly resists corrosion attack on the magnesium sheet, with decreased corrosion current density, icorr (1.552 μA/cm2) as compared to the bare magnesium sheet (109.8 μA/cm2). During the microcapsule preparation, increasing the stirring rate from 300 to 800 rpm reduces the icorr value by roughly half. As a result, the self-healing coatings demonstrated adequate self-healing and corrosion resistance recovery on magnesium alloys.

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