Synthesis of Urethane Oil Varnishes from Waste Poly(ethylene terephthalate)

Recent advances in chemical recycling of polyethylene terephthalate waste into value added products for sustainable coating solutions – hope vs . hype

“…In term of physical properties such as Koenig hardness, drying time and adhesiveness they observed that, the synthesized urethane oil varnishes have almost similar values compared to commercialized urethane oil. Similar to Akar and co-workers 120 Saravari and his research team also reported synthesis of urethane oils from recycled PET waste. 121 Here they employed propylene glycol for of PET.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as a raw material. 120 To synthesize the PU oil at first, they performed transesterification reaction of PET which leads to formation of oligoesters of PET. In the next step, they conducted a reaction of this glycolyzed PET product with soybean oil and glycerine followed by a reaction with toluene diisocyanate (TDI) which ultimately leads to production of urethane varnish oil, which was simultaneously thinned with white spirit to get ~60% solid.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as raw materials. 121 To synthesize the PU oil, at first, they performed…”

Recent advances in chemical recycling of polyethylene terephthalate waste into value added products for sustainable coating solutions – hope vs . hype

“…In term of physical properties such as Koenig hardness, drying time and adhesiveness they observed that, the synthesized urethane oil varnishes have almost similar values compared to commercialized urethane oil. Similar to Akar and co-workers 120 Saravari and his research team also reported synthesis of urethane oils from recycled PET waste. 121 Here they employed propylene glycol for of PET.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as a raw material. 120 To synthesize the PU oil at first, they performed transesterification reaction of PET which leads to formation of oligoesters of PET. In the next step, they conducted a reaction of this glycolyzed PET product with soybean oil and glycerine followed by a reaction with toluene diisocyanate (TDI) which ultimately leads to production of urethane varnish oil, which was simultaneously thinned with white spirit to get ~60% solid.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as raw materials. 121 To synthesize the PU oil, at first, they performed…”

Advances and approaches for chemical recycling of plastic waste

“…Whereas the foregoing discussion highlights efforts to leverage glycolysis of PET with EG to synthesize BHET as a monomer feedstock, an emerging area of interest is the use of the chemically recycled PET products as feedstocks for other polymer formulations. Mecit and Akar [ 52 ] used different glycols to convert PET into lower‐weight oligomers having hydroxyl end groups that were then reacted with toluene diisocyanate to produce urethane oils. The recycled urethane oils showed similar Koenig hardness values and touch/hard to dry times to commercially available oils.…”

Chemical upcycling of poly(ethylene terephthalate) waste: Moving to a circular model

“…For instance, they can be converted into urethane oils with physical properties comparable to those of commercial products by applying common reagents such as ethylene glycol, diethylene glycol, poly(ethylene glycol) 200, glycerine and toluene diisocyanate. 87 In this context, Saravari et al followed the same idea and developed a method to produce urethane oils with different compounds, like soybean oil, to form monoglycerides and diglycerides. The isocyanate content correlated with viscosity, molecular weight, and drying time, with the first two increasing and the latter decreasing as the percentage of isocyanate increased.…”

Recent advances in chemical recycling of polyethylene terephthalate waste into value added products for sustainable coating solutions – hope vs . hype

“…In term of physical properties such as Koenig hardness, drying time and adhesiveness they observed that, the synthesized urethane oil varnishes have almost similar values compared to commercialized urethane oil. Similar to Akar and co-workers 120 Saravari and his research team also reported synthesis of urethane oils from recycled PET waste. 121 Here they employed propylene glycol for of PET.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as a raw material. 120 To synthesize the PU oil at first, they performed transesterification reaction of PET which leads to formation of oligoesters of PET. In the next step, they conducted a reaction of this glycolyzed PET product with soybean oil and glycerine followed by a reaction with toluene diisocyanate (TDI) which ultimately leads to production of urethane varnish oil, which was simultaneously thinned with white spirit to get ~60% solid.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as raw materials. 121 To synthesize the PU oil, at first, they performed…”

Advances and approaches for chemical recycling of plastic waste

“…Whereas the foregoing discussion highlights efforts to leverage glycolysis of PET with EG to synthesize BHET as a monomer feedstock, an emerging area of interest is the use of the chemically recycled PET products as feedstocks for other polymer formulations. Mecit and Akar [ 52 ] used different glycols to convert PET into lower‐weight oligomers having hydroxyl end groups that were then reacted with toluene diisocyanate to produce urethane oils. The recycled urethane oils showed similar Koenig hardness values and touch/hard to dry times to commercially available oils.…”

Chemical upcycling of poly(ethylene terephthalate) waste: Moving to a circular model

“…For instance, they can be converted into urethane oils with physical properties comparable to those of commercial products by applying common reagents such as ethylene glycol, diethylene glycol, poly(ethylene glycol) 200, glycerine and toluene diisocyanate. 87 In this context, Saravari et al followed the same idea and developed a method to produce urethane oils with different compounds, like soybean oil, to form monoglycerides and diglycerides. The isocyanate content correlated with viscosity, molecular weight, and drying time, with the first two increasing and the latter decreasing as the percentage of isocyanate increased.…”

Recent advances in chemical recycling of polyethylene terephthalate waste into value added products for sustainable coating solutions – hope vs . hype

“…In term of physical properties such as Koenig hardness, drying time and adhesiveness they observed that, the synthesized urethane oil varnishes have almost similar values compared to commercialized urethane oil. Similar to Akar and co-workers 120 Saravari and his research team also reported synthesis of urethane oils from recycled PET waste. 121 Here they employed propylene glycol for of PET.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as a raw material. 120 To synthesize the PU oil at first, they performed transesterification reaction of PET which leads to formation of oligoesters of PET. In the next step, they conducted a reaction of this glycolyzed PET product with soybean oil and glycerine followed by a reaction with toluene diisocyanate (TDI) which ultimately leads to production of urethane varnish oil, which was simultaneously thinned with white spirit to get ~60% solid.…”

“…As for example, Akar and co-workers developed novel urethane oil varnishes using glycolyzed PET waste products as raw materials. 121 To synthesize the PU oil, at first, they performed…”

Advances and approaches for chemical recycling of plastic waste

“…Whereas the foregoing discussion highlights efforts to leverage glycolysis of PET with EG to synthesize BHET as a monomer feedstock, an emerging area of interest is the use of the chemically recycled PET products as feedstocks for other polymer formulations. Mecit and Akar [ 52 ] used different glycols to convert PET into lower‐weight oligomers having hydroxyl end groups that were then reacted with toluene diisocyanate to produce urethane oils. The recycled urethane oils showed similar Koenig hardness values and touch/hard to dry times to commercially available oils.…”

Chemical upcycling of poly(ethylene terephthalate) waste: Moving to a circular model

“…For instance, they can be converted into urethane oils with physical properties comparable to those of commercial products by applying common reagents such as ethylene glycol, diethylene glycol, poly(ethylene glycol) 200, glycerine and toluene diisocyanate. 87 In this context, Saravari et al followed the same idea and developed a method to produce urethane oils with different compounds, like soybean oil, to form monoglycerides and diglycerides. The isocyanate content correlated with viscosity, molecular weight, and drying time, with the first two increasing and the latter decreasing as the percentage of isocyanate increased.…”