The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently even without using a base. The method for producing a carbonate derivative according to the present invention is characterized in comprising the step of irradiating a high energy light to a composition comprising the halogenated methane and the hydroxy group-containing compound in the presence of oxygen, wherein a molar ratio of a total usage amount of the hydroxy group-containing compound to 1 mole of the halogenated methane is 0.05 or more.

The present invention relates to ether diol-derived polycarbonate diol of anhydrohexitol, a method for preparing same, polyurethane prepared from same and an adhesive comprising same and, more specifically, to polycarbonate diol, a method for preparing same, polyurethane prepared from same and an adhesive, paint and coating agent comprising same, the polycarbonate diol comprising repeating units derived from: ether diol of anhydrohexitol; carbonic diester; and random anhydrohexitol, and thus exhibiting enhanced color improving effect compared to existing polycarbonate diol and providing notably enhanced adhesion (T-peeling strength or shear strength) to polyurethane prepared by means of same.

In one aspect, the present disclosure encompasses a nanocomposite composition comprising a polycarbonate polyol and a nanofiller, wherein the polycarbonate polyol comprises: (a) a polycarbonate polyol derived from copolymerization of CO.sub.2 and one or more epoxides; and/or (b) an aliphatic polycarbonate polyol. In a second aspect, the present disclosure encompasses a method for preparing the nanocomposite composition. In a third aspect, the present disclosure encompasses a method of improving a performance property of a polycarbonate polyol, the method comprising the step of forming the nanocomposite composition.

The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently. A method for producing a polycarbonate is characterized in comprising the step of irradiating a light to a composition comprising a C.sub.1-4 halogenated hydrocarbon, the specific diol compound and the specific base in the presence of oxygen.

The present invention relates to a highly bio-based polycarbonate ester and a method for producing same. The highly bio-based polycarbonate ester has a bio-based carbon content of 80% or more since the highly bio-based polycarbonate ester is obtained by copolymerization of 1,4:3,6-dianhydrohexitol, which is a bio-based monomer derived from biomass, and 1,4-cyclohexanedicarboxylate and/or terephthalate, and therefore, the highly bio-based polycarbonate ester is not only human-friendly and environmentally friendly, but also advantageous in terms of biodegradability.

Provided is a synthesis method comprising a first step of producing a carbonate compound from carbon monoxide and an alcohol-based compound at an anode of a first electrochemical cell comprising a cathode and the anode, and a second step of synthesizing a first product by a dealcoholization reaction of the carbonate compound, wherein an alcohol-based compound eliminated in the second step is recycled in the first step.

Techniques regarding the synthesis of one or more polymers through one or more ring-opening polymerizations conducted within a flow reactor and facilitated by one or more anionic catalysts are provided. For example, one or more embodiments can comprise a method, which can comprise polymerizing, via a ring-opening polymerization within a flow reactor, a cyclic monomer in the presence of one or more anionic organocatalysts.

An apparatus and methods for using coatings for metal applications are disclosed. According to one embodiment, an article comprises a cured polymeric film having a first reaction product of a cationic photoinitiator and a compound suitable for cationic polymerization. The article has a second reaction product of a free-radical photoinitiator and a compound suitable for free-radical polymerization; The article has a metal substrate, wherein the cured polymeric film coats the metal substrate.

Disclosed herein are embodiments of a method for making recyclable polymers and a method for decomposing the polymers back to the monomers which can then be reused. The polymer are stable to aqueous and/or acid conditions and may have a formula II

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The method to decompose the polymer back to the monomers may comprise heating the polymer in a protic organic solvent.

Described herein are methods of preparing poly(alkylene carbonate) polymers comprising an increased ratio of primary hydroxyl end groups to secondary hydroxyl end groups, and compositions thereof.