The present invention is directed to a process for producing a molded polymeric article including: providing a polymerizable composition of a reaction mixture of at least the following components: a mold release agent of ionic fluoride and/or ionic fluoride precursor, and a polymeric organic material selected from thermosetting organic polymeric materials and thermoplastic organic materials; allowing the reaction mixture to undergo exothermic reaction; providing a mold having a first part and a second part spaced one from the other thereby forming a cavity there between; introducing the reaction mixture into the mold cavity wherein the reaction mixture is at a temperature of up to 130 C.; holding the mold at a temperature and for a time sufficient to cure the reaction mixture thereby forming a molded polymeric article within the mold; and removing the molded polymeric article from the mold.

Molded articles also are provided.

The invention relates to a composition for producing transparent polythiourethane bodies containing or consisting of A) a polyisocyanate component containing at least one polyisocyanate with a functionality of isocyanate groups of at least 2 per molecule, B) a thiol component containing at least one polythiol with a functionality of thiol groups of at least two per molecule, in addition to optionally C) auxiliary agents and additives, the ratio of isocyanate groups to groups reactive in relation to isocyanates being 0.5:1 to 2.0:1. The composition is characterized in that the polyisocyanate of the polyisocyanate component A) is produced by a gas-phase phosgenation of aliphatic, cycloaliphatic, aromatic or araliphatic polyamines. The invention also relates to a method for producing transparent polythiourethane bodies by the conversion of a composition of this type, to polythiourethane bodies produced in this manner and to the use of polyisocyanates, produced by a gas-phase phosgenation of aliphatic, cycloaliphatic, aromatic or araliphatic polyamines, for producing transparent polythiourethane bodies.

The present invention relates to a novel thermoplastic polyurethane (TPU) elastomer, T-frames made thereof as well as the use of the new TPU in manufacturing of T-frames for intrauterine systems for contraception and therapy.

The disclosure concerns medical device parts having a thickness of about 4 mm or less, where the medical device part is manufactured by an injection molding process utilizing a polycarbonate polymer and from about 0.2 wt % to about 0.5 wt % of pentaerythritol tetrastearate and from about 0.05 wt % to about 0.3 wt % of glycerol monostearate; wherein said pentaerythritol tetrastearate is derived from a biosource.

A two-component curable epoxy resin system including a dye solution. The resin system includes an epoxy resin component containing at least 80% by weight of a polyglycidyl ether of a polyphenol. The system also includes a hardener mixture containing mainly polyethylene tetraamines. The system includes triethylene diamine in specific amounts as a catalyst. The system has beneficial curing characteristics with desired color that make it useful for producing fiber-reinforced composites in a resin transfer molding process.

Provided is a release agent for vulcanized rubber molding, the release agent exhibiting good mold releasability between a mold and a rubber after vulcanization and capable of being easily removed after production. The release agent for vulcanized rubber molding contains a polyoxyalkylene glyceryl ether (A). The polyoxyalkylene glyceryl ether (A) contains 50% to 95% by mass of oxyethylene groups in 100% by mass of oxyalkylene groups. The polyoxyalkylene glyceryl ether (A) preferably has a number-average molecular weight of 2,000 to 20,000.

The invention relates to a method for producing the isomers 1,3- and/or 1,4-xylylene diisocyanates by reacting the corresponding 1,3- and/or 1,4-xylylene diamines with phosgene in the gaseous phase.

The invention relates to a composition for producing transparent polythiourethane bodies containing or consisting of A) a polyisocyanate component containing at least one polyisocyanate with a functionality of isocyanate groups of at least 2 per molecule, B) a thiol component containing at least one polythiol with a functionality of thiol groups of at least two per molecule, in addition to optionally C) auxiliary agents and additives, the ratio of isocyanate groups to groups reactive in relation to isocyanates being 0.5:1 to 2.0:1. The composition is characterised in that the polyisocyanate of the polyisocyanate component A) is produced by a gas-phase phosgenation of aliphatic, cycloaliphatic, aromatic or araliphatic polyamines. The invention also relates to a method for producing transparent polythiourethane bodies by the conversion of a composition of this type, to polythiourethane bodies produced in this manner and to the use of polyisocyanates, produced by a gas-phase phosgenation of aliphatic, cycloaliphatic, aromatic or araliphatic polyamines, for producing transparent polythiourethane bodies.

A method for setting conditions for use of a polymerization catalyst includes a step of acquiring a physical property value derived from remaining functional groups after maintaining a temperature of a composition including a polymerization-reactive compound and a predetermined amount of a polymerization catalyst, a step of calculating a remaining functional group ratio from the physical property value, a step of calculating a reaction rate constant based on a reaction rate equation from the remaining functional group ratio, a step of calculating an activation energy and a frequency factor from the reaction rate constant using an Arrhenius plot, a step of determining whether or not the activation energy satisfies a predetermined condition for the polymerization catalyst, an step of setting an approximation equation from the frequency factor, and a step of setting an addition range with respect to the polymerization-reactive compound.

Polymerizable liquid compositions containing three components (A), (B) and (C) are provided, wherein component (A) contains at least one cycloaliphatic diisocyanate monomer wherein the weight percentage of free isocyanate groups in component (A) ranges from about 20% to about 50% by weight with respect to the total weight of component (A); component (B) contains at least one polythiol having a molecular weight ranging from 50 to 1,200 g/moles and a functionality ranging from 2 to 5, the components (A) and (B) being present in a weight ratio varying from 0.5:1 to 2:1; and component (C) being a defined polymerization catalyst. A process for the production of organic glass using the polymerizable liquid composition is further provided.