Provided are a photocurable resin composition that can be suitably used for an optical three-dimensional shaping method, and a cured product obtained by photocuring the composition and a three-dimensional shaped object including the cured product. The photocurable resin composition contains a compound represented by the formula (1) and a compound containing two or more epoxy groups. ##STR00001##

Provided are a photocurable resin composition that can be suitably used for an optical three-dimensional shaping method, and a cured product obtained by photocuring the composition and a three-dimensional shaped object including the cured product. The photocurable resin composition contains a compound represented by the formula (1) and a compound containing two or more epoxy groups. ##STR00001##

Provided is a method of producing a polycarbonate-based resin composition, including mixing an aliphatic polycarbonate-based resin (A) containing a specific repeating unit (A-1), and at least one kind of aromatic thermoplastic resin (S) selected from the group consisting of an aromatic polycarbonate-based resin (B) containing a polycarbonate block formed of a specific repeating unit, an aromatic polyester-based resin (C) having a specific structural unit, and a polyarylate resin (D) having a specific structural unit in the presence of a transesterification catalyst at a temperature at which the resin components melt.

Disclosed herein are crosslinked polycarbonates, composition thereof and methods thereof. The crosslinked polycarbonates can be prepared from allyl or epoxy polycarbonates. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Polycarbonate polyols are made by copolymerizing carbon dioxide and an alkylene oxide in the presence of a starter compound and a carbonate catalyst. The process is operated in semi-batch mode by combining starter, catalyst and a small amount of alkylene oxide in a reaction vessel, pressurizing the vessel with carbon dioxide, initiating polymerization, and then feeding both carbon dioxide and alkylene oxide to the vessel under polymerization conditions without removal of product until the feeds are completed.

Provided is a compound represented by General Formula (1)

##STR00001##

in General Formula (1), Ar.sub.1 and Ar.sub.2 independently represent a group selected from the following Formulae,

##STR00002##

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.

Antimicrobial cationic polycarbonates and polyurethanes have been prepared comprising one or more pendent guanidinium and/or isothiouronium groups. Additionally, antimicrobial particles were prepared having a silica core linked to surface groups comprising a guanidinium and/or isothiouronium group. The cationic polymers and cationic particles can be potent antimicrobial agents against Gram-negative microbes, Gram-positive microbes, and/or fungi.

A process for continuous production of polyether carbonate polyols by the addition of alkylene oxide and carbon dioxide in the presence of a DMC catalyst or a metal complex catalyst based on the metals cobalt and/or zinc, onto an H-functional starter substance is provided. Wherein (γ) the H-functional starter substance, alkylene oxide and catalyst are continuously metered into the reaction during the addition and the resulting reaction mixture is continuously discharged from the reactor, wherein (i) before step (γ), a suspension of catalyst in suspension medium and/or H-functional starter substance in the reactor is adjusted to a temperature T.sub.1 ranging from 100° C. to 150° C., wherein T.sub.1 is at least 10% above a temperature T.sub.2 and T.sub.2 is a temperature ranging from 50° C. to 135° C., and (ii) from commencement of the addition of alkylene oxide in step (γ) the temperature is continuously reduced to the temperature T.sub.2.

In one aspect, the present disclosure encompasses polymerization systems for the copolymerization of CO.sub.2 and epoxides comprising 1) a catalyst including a metal coordination compound having a permanent ligand set and at least one ligand that is a polymerization initiator, and 2) a chain transfer agent having two or more sites that can initiate polymerization. In a second aspect, the present disclosure encompasses methods for the synthesis of polycarbonate polyols using the inventive polymerization systems. In a third aspect, the present disclosure encompasses polycarbonate polyol compositions characterized in that the polymer chains have a high percentage of —OH end groups and a high percentage of carbonate linkages. The compositions are further characterized in that they contain polymer chains having an embedded polyfunctional moiety linked to a plurality of individual polycarbonate chains.