In this study,different samples of alkyd resins based on Citrullus colocynthis seed oil(CCSO)—which has a high content of linoleic acid—were prepared as a renewable raw material.Short(I),medium(II),and long(III)alky...In this study,different samples of alkyd resins based on Citrullus colocynthis seed oil(CCSO)—which has a high content of linoleic acid—were prepared as a renewable raw material.Short(I),medium(II),and long(III)alkyd resins were synthesized using oil,glycerol,and phthalic anhydride(PA)in different proportions.Prunus mahaleb seed oil(PMSO),which contains conjugated linolenic acid,was blended with CCSO in different proportions to examine the effect of PMSO on the film properties of alkyd resins(IV and V).All synthesized resins were characterized by FTIR and 1H NMR spectroscopic analysis.These resins were also cured by an epoxy resin and their film properties(pencil hardness,adhesion,gloss,and chemical resistance)were determined.Analysis of these alkyds reveals that CCSO can be used as a new potential raw material for coating applications.展开更多
Oilless alkyd resin modified with the silicoorganic compounds has been obtained successfully by polymerization.At appropriate proportion of silicoorganic compounds,the polymerized product has higher hardness and lustr...Oilless alkyd resin modified with the silicoorganic compounds has been obtained successfully by polymerization.At appropriate proportion of silicoorganic compounds,the polymerized product has higher hardness and lustre than that of oilless alkyd resin.展开更多
Significant scientific and economic benefits may be derived from investigating the best choice of catalyst in the alkyd resin synthesis. The effect of catalyst type and concentration on the production of alkyd resin u...Significant scientific and economic benefits may be derived from investigating the best choice of catalyst in the alkyd resin synthesis. The effect of catalyst type and concentration on the production of alkyd resin using castor seed oil (CSO) was evaluated. Lithium hydroxide, lead (II) oxide, calcium carbonate, sodium hydroxide and calcium oxide were investigated. The fatty acid profile of the raw CSO was determined using GC-MS while structural elucidation of the CSO based alkyd resins was determined using FTIR spectrometry. The CSO modified alkyd resin produced has acid values of 5.0, 5.61, 7.0 8.24 and 11 for lithium hydroxide, lead (II) oxide, calcium carbonate, sodium hydroxide and calcium oxide respectively. The extent of reaction was 95%, 95%, 91%, 89% and 88% for lithium hydroxide, lead (II) oxide, calcium carbonate, sodium hydroxide and calcium oxide respectively at the reaction time of 150 minutes. The alcoholysis reaction completion time was fastest in LiOH followed by PbO, CaCO<sub>3</sub>, NaOH and CaO catalyst. Physico-chemical parameters of the oil and performance evaluation of the alkyd films suggest that they are sustainable materials for surface coating. LiOH shows excellent robustness to expanded process parameters.展开更多
文摘In this study,different samples of alkyd resins based on Citrullus colocynthis seed oil(CCSO)—which has a high content of linoleic acid—were prepared as a renewable raw material.Short(I),medium(II),and long(III)alkyd resins were synthesized using oil,glycerol,and phthalic anhydride(PA)in different proportions.Prunus mahaleb seed oil(PMSO),which contains conjugated linolenic acid,was blended with CCSO in different proportions to examine the effect of PMSO on the film properties of alkyd resins(IV and V).All synthesized resins were characterized by FTIR and 1H NMR spectroscopic analysis.These resins were also cured by an epoxy resin and their film properties(pencil hardness,adhesion,gloss,and chemical resistance)were determined.Analysis of these alkyds reveals that CCSO can be used as a new potential raw material for coating applications.
文摘Oilless alkyd resin modified with the silicoorganic compounds has been obtained successfully by polymerization.At appropriate proportion of silicoorganic compounds,the polymerized product has higher hardness and lustre than that of oilless alkyd resin.
文摘Significant scientific and economic benefits may be derived from investigating the best choice of catalyst in the alkyd resin synthesis. The effect of catalyst type and concentration on the production of alkyd resin using castor seed oil (CSO) was evaluated. Lithium hydroxide, lead (II) oxide, calcium carbonate, sodium hydroxide and calcium oxide were investigated. The fatty acid profile of the raw CSO was determined using GC-MS while structural elucidation of the CSO based alkyd resins was determined using FTIR spectrometry. The CSO modified alkyd resin produced has acid values of 5.0, 5.61, 7.0 8.24 and 11 for lithium hydroxide, lead (II) oxide, calcium carbonate, sodium hydroxide and calcium oxide respectively. The extent of reaction was 95%, 95%, 91%, 89% and 88% for lithium hydroxide, lead (II) oxide, calcium carbonate, sodium hydroxide and calcium oxide respectively at the reaction time of 150 minutes. The alcoholysis reaction completion time was fastest in LiOH followed by PbO, CaCO<sub>3</sub>, NaOH and CaO catalyst. Physico-chemical parameters of the oil and performance evaluation of the alkyd films suggest that they are sustainable materials for surface coating. LiOH shows excellent robustness to expanded process parameters.
