The invention relates to a process for drying a catalyst carrier or drying a catalyst comprising a carrier on which a metal is supported, wherein the carrier or catalyst is contacted with a drying agent which comprises an organic carbonate. Further, the invention relates to a process for preparing a catalyst which comprises a carrier on which a metal is supported, said process comprising drying the carrier by contacting the carrier with a drying agent which comprises an organic carbonate resulting in a dried carrier; and impregnating the dried carrier with a solution wherein a compound containing the metal is dissolved in a solvent which is an organic carbonate or an alcohol. Still further, the invention relates to a process for preparing an aromatic carbonate, such as a diaryl carbonate, using the catalyst thus prepared or dried; and to a process for making a polycarbonate from the diaryl carbonate thus prepared.

A method of preparing a polycarbonate composition in a polymerization system that comprises a monomer mixing unit, an oligomerization section, and a polymerization section. The method includes melt polymerizing a dihydroxy compound with a diaryl carbonate compound in the presence of a quaternary phosphonium catalyst to produce the polycarbonate composition having a phosphorus-containing byproduct of at least one of the quaternary phosphonium catalyst or of the diaryl carbonate compound. The method further includes recycling the phosphorus-containing byproduct into the monomer mixing unit of the polymerization system and removing the polycarbonate composition from the polymerization system. The recycle stream has a phosphorus concentration of greater than or equal to 40 ppm.

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.

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.

The invention provides liquid injectable copolymers of TMC and HTMC that are degradable in vivo. Degradation can be tailored by adjusting the amount of HTMC in the copolymer, the initial molecular weight of the copolymer, and the characteristics of the initiator used in its preparation. Specifically, the degradation rate increases as the amount of HTMC incorporated into the copolymer increases, as the molecular weight of the copolymer decreases, and as the hydrophobicity of the initiator decreases. Moreover, the degradation yields products such as glycerol and carbon dioxide that are non-toxic in vivo, and which will not cause a substantive change in tissue pH upon implantation in vivo. The copolymers may be used in applications such as drug delivery and as coatings.

The present invention relates to triarylmethane compounds of the formula (I), which suitable as monomers for preparing thermoplastic resins having beneficial optical properties and which can be used for producing optical devices. R.sup.1, R.sup.2 are e.g. hydrogen; Y is an alkylene group having 2, 3 or 4 carbon atoms, Ar is selected from mono- or polycyclic aryl and mono- or polycyclic hetaryl; X.sup.1, X.sup.2, X.sup.3, X.sup.4 are CH, C—R.sup.x or N, provided that in each ring at most two of X.sup.1, X.sup.2, X.sup.3, X.sup.4 are N; R.sup.x is e.g. halogen, CN or CH═CH.sub.2. The invention also relates to thermoplastic resins comprising a polymerized unit of the compound of formula (I).

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The present invention relates to a production method of a poly(ester)carbonate, including subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound.

The present invention relates to a production method of a poly(ester)carbonate, including subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound.

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.

A polymeric binder includes an ion-conducting polymer containing a polymer and a metal ion. The polymer is preferably selected from the group consisting of polyester, polyether, anionic polymer, polycarbonate, and silicone. An all-solid-state secondary battery includes an inorganic solid electrolyte, and the inorganic solid electrolyte in at least an electrode mixture layer or an inorganic solid electrolyte layer is bound together by the polymeric binder.