41710-01-4Relevant articles and documents
Zinc-catalyzed depolymerization of polyethers to produce valuable building blocks
Enthaler, Stephan
, p. 850 - 859 (2014/06/23)
The recycling of polymers continues to be a significant matter for a sustainable society. In particular, the conversion of end-of-life polymers to monomers or suitable low-molecular weight chemicals creates a feedstock for new high-quality polymeric materials and contributes to conserve resources and allow overall an efficient waste-managing system. In the present study, we have set up a straightforward methodology for the depolymerization of artificial polyethers applying cheap and abundant zinc( II) salts as precatalysts. In the presence of bio-based fatty acid chlorides as depolymerization reagent well-defined chloroesters were accessible in good to excellent yields. Moreover, acetic anhydride and fatty acids were applied as depolymerization reagents resulting in the formation of diacetates in moderate yields. In both cases the obtained products (chloroesters, diacetates) can be useful building blocks in polymerization chemistry. Noteworthy, overall a recycling of polyethers are possible. Springer Science+Business Media New York 2014.
Polyol polyester-containing personal care products that do not contain low viscosity silicone fluids
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Page/Page column 4, (2008/06/13)
The invention provides a personal care product that does not contain a lower viscosity silicone fluid; the personal care product includes at least one polyol polyester that is the esterification reaction product of a polyol having three to six carbons atoms and a carboxylic acid having three to six carbon atoms and a personal care formulation. Also provided are replacement compositions for use in personal care products that are at least one polyol polyester that is the esterification reaction product of a polyol having three to six carbons atoms and a carboxylic acid having three to six carbon atoms and having a kinematic viscosity of about 2 to about 20 centistokes at 25° C. and wherein the replacement composition does not contain a low viscosity silicone fluid. Related methods are also described.