《Fully renewable limonene-derived polycarbonate as a high-performance alkyd resin》 was published in Polymer International in 2020. These research results belong to Li, Chunliang; Veldhuis, Theo; Reuvers, Bart; Sablong, Rafael J.; Koning, Cor E.. Product Details of 1530-32-1 The article mentions the following:
Limonene-derived polycarbonate-based alkyd resins (ARs) have been prepared by copolymerization of limonene dioxide with CO2, catalyzed by a β-diiminate zinc-bis(trimethylsilyl)amido complex, and subsequent chem. modification with soybean oil fatty acids using triphenylethylphosphonium bromide as the catalyst. This quant. partial modification was realized via epoxy-carboxylic acid chem., affording ARs with higher oil lengths, lower polydispersities and higher glass transition temperatures (Tg) in comparison to a conventional polyester AR based on phthalic acid, multifunctional polyol pentaerythritol and soybean fatty acid. The novel limonene polycarbonate AR and the conventional polyester AR were evaluated as coatings and both the phys. drying (without the presence of the oxidative drying accelerator Borchi Oxy Coat) and chem. curing (with Borchi Oxy Coat) processes of these coatings were monitored by measuring the Koenig hardness and complex modulus development with time. A better performance was obtained for the alkyd paint containing polycarbonates modified with fatty acids (FA-PCs), which showed a faster chem. drying, a higher Koenig hardness and a higher Tg in coating evaluation, demonstrating that the fully renewable FA-PCs are promising resins for alkyd paint applications. The experimental process involved the reaction of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Product Details of 1530-32-1)
Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Product Details of 1530-32-1
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary