Catalytic developments in the epoxidation of vegetable oils
These epoxidized vegetable oils were commonly used as PVC plasticizers (primary61 and secondary62–64) to entirely or partially replace detrimental phthalates, low-temperature lubricants,51 and high-temperature lubricants,65 stabilizers for PVC and starting materials to produce polyols and prepolymers in
EP2070977A2 - Epoxidised vegetable oils as PVC plasticizers
Abstract. The present descriptive report refers to a patent of invention of PVC plasticizers composed of epoxidized bioesters of vegetable oil fatty acids obtained by partial transesterification with ethanol and glycerin and further acetylation and epoxidation, and PVC compounds plasticized with bioesters resulting from partial
A new biobased plasticizer for poly(vinyl chloride) based on
tors. Epoxidized vegetable oils offer interesting possibilities in PVC plasticization. Their use as main plasticizer or, more often as secondary plasticizers is continually increasing; it is possible to find recent works based on the use of epoxidized vegetable oils derived from linseed oil, castor oil, soybean oil, sunflower oil, rubber seed
Epoxidized vegetable oil and bio‐based materials as PVC
Bondeson studied the epoxidation of vegetable oils such as soybean, sunflower, and safflower are good replacements for DINP in PVC materials used for indoor applications. 95 Moreover, the rate of crosslinking is positively correlated with the degree of epoxidation of the epoxidized vegetable oils.
Development Of Biobased Plasticizers From Vegetable Oils
Vegetable oils are ubiquitous, nontoxic, low cost materials that can be chemically modified to function as plasticizers in PVC. To be compatible, vegetable oils must be modified to reduce molecular weight, balance of polarity, and introduce branching along the fatty acid backbone. Readily available soybean oil was used as the primary starting
- Why are epoxidized triglyceride oils used as secondary plasticizers?
- These are the reasons why epoxidized triglyceride oils are mostly utilized as secondary plasticizers. 72–74 Epoxy groups catch the HCl released from the thermal degradation of PVC, give exceptional light, and heat stability to PVC. 75 Until now, every catalytic system has been associated with both benefits and bottlenecks.
- Is epoxidized soybean oil a good plasticizer?
- Indeed, it is an interesting route due to it being greener and safer. 68–70 Epoxidized soybean oil (ESO) occupies about 4.9% of the total plasticizer market. 71 After epoxidation, some extent of double bonds remains unchanged, which increases the molar mass of the product and consequently, reduces the compatibility with PVC.
- What is epoxidation of vegetable oil?
- Epoxidation is the chemical reaction that converts the carbon–carbon double bond into oxiranes (epoxides) using a variety of oxidizing agents. Various methods have been developed for the epoxidation of vegetable oils as follows: • Homogeneous catalytic system by peroxyacids. • Heterogeneous catalytic system by acidic ion exchange resins (AIERs).
- Can vegetable oils replace phthalate plasticizers?
- Functionalization of vegetable oils (VOs) including edible, non-edible, and waste cooking oil (WCOs) to epoxides (EVOs) is receiving great attention by many researchers from academia and industry because they are renewable, versatile, sustainable, non-toxic, and eco-friendly, and they can partially or totally replace harmful phthalate plasticizers.
- Is epoxidation environmentally friendly?
- As the process intensified, epoxidation was tested by an environment friendly route with alternative resources such as waste vegetable oil, citric acid as the only acidic component, and H 2 O 2 as the green oxidant, thus producing only a liquid residue less noxious than that from the traditional processes.
- Can vegetable oils be used as epoxides?
- However, May et al.109 and Meyer et al.113 approved that vegetable oils with a rather high content of unsaturation or high iodine value such as soybean and linseed oils can be selected as a prior raw material to produce epoxides with high epoxy functionality. 3. Epoxidation of vegetable oils
