Provided is a polycarbonate-polyorganosiloxane copolymer, which is produced by using a diol monomer (a1) and a polyorganosiloxane (a2) satisfying the following condition, including: a polyorganosiloxane block (A-1) including a specific repeating unit; and a polycarbonate block (A-2) formed of a specific repeating unit: a mixture, which is obtained by bringing the diol monomer (a1), the polyorganosiloxane (a2), a carbonic acid diester, and a basic catalyst present at the same amount ratio as that at a time of production of the polycarbonate-polyorganosiloxane copolymer into contact with each other at from 100° C. to 250° C. for from 0.5 hour to 5 hours, has a haze value of 30 or less measured under conditions of 23° C. and an optical path length of 10 mm in conformity with ISO 14782:1999.

Provided is a polycarbonate-polyorganosiloxane copolymer, including: a polyorganosiloxane block (A-1) including a specific structural unit; and a polycarbonate block (A-2) formed of a specific repeating unit, wherein the polycarbonate-polyorganosiloxane copolymer satisfies the following condition (A) or (B): condition (A): a hexane extraction amount of the polycarbonate-polyorganosiloxane copolymer is 150 ppm or less; and condition (B): average weights of polyorganosiloxane blocks in polycarbonate-polyorganosiloxane copolymers obtained by separating the polycarbonate-polyorganosiloxane copolymer with a gel permeation chromatograph satisfy a specific expression.

A hydrophilic silicone particle containing a surfactant fixed by a chemical bond formed by radical polymerization to a surface of a silicone particle having a volume average particle size of 0.1 to 100 μm and a method for producing the hydrophilic silicone particle, the method including fixing a hydrophilic group derived from a component (B) to a surface of a silicone particle by subjecting an emulsion to radical polymerization, the emulsion containing: (A) 100 parts by mass of an organopolysiloxane having a radical polymerization reactive group; (B) 0.5 to 50 parts by mass of a surfactant having a radical polymerization reactive group; (C) 0.1 to 5 parts by mass of a radical generator; and (D) 10 to 1000 parts by mass of water. A silicone particle may be readily dispersed in an aqueous material without the additional use of a dispersant (typically, a surfactant) and has a hydrophilic group.

The present invention concerns a solid nanocomposite material consisting of a polymer-matrix in which are dispersed alkali metal, hydronium or ammonium salts of polyanionic components, wherein the polymer-matrix comprises at least a linear or branched polymer or copolymer containing one or several poly(ethylene oxide) (PEO) chains, said polymer or copolymer being optionally crosslinked and each PEO chain having at least 4 ethylene oxide monomer units. The present invention relates also to a photonic, e.g. optoelectronic, device comprising such a nanocomposite material. Such material and device can be used as phosphorescence emitter, for crop growth lighting or for generating singlet oxygen.

This disclosure describes micro, sub-micro, and nano-cellular polymer foams formed from a polymer composition that includes a polymer and functionalized carbon nanotubes, and systems and methods of formation thereof. The microcellular polymer foam has an average pore size within a range of 1 micron to 100 microns, the sub-microcellular polymer foam has an average pore size within a range of 0.5 microns to 1 micron, and the nano-cellular polymer foam has an average pore size within a range of 10 nanometers to 500 nanometers. In other aspects, this disclosure describes micro, sub-micro, and nano-cellular polymer foams formed from a polymer composition that includes a polymer and non-functionalized carbon nanotubes.

An object of the present invention is to provide a modified silicone resin foam that can be foamed without generating hydrogen as a by-product, while maintaining excellent texture and flexibility. The present invention provides a modified silicone resin foam obtained by curing a foamable liquid resin composition, the foamable liquid resin composition containing 100 parts by weight of a base resin, 0.1 to 5 parts by weight of a silanol condensation catalyst, and 2 to 40 parts by weight of a chemical foaming agent, the base resin including a polymer having in its molecular chain at least one silyl group that contains a hydrolyzable group bonded to a silicon atom and can be crosslinked by forming a siloxane bond, the polymer having a backbone composed of oxyalkylene units, the foam having an ASKER FP hardness of 60 or less in a 25° C. atmosphere.

The present invention relates to a gas separation membrane for separating a target gas species from a mixture of gas species, the membrane comprising: (i) a porous substrate having a first and second surface region between which the mixture of gas species will flow; (ii) a sealing polymer layer of different composition to the porous substrate that (a) forms a continuous coating across the second surface region of the substrate, and (b) is permeable to the mixture of gas species; and (iii) a selective polymer layer in the form of a cross linked macromolecular film that (a) is located on and covalently coupled to the sealing polymer layer, and (b) has a higher permeability to the target gas species relative to other gas species present in the mixture of gas species that is to be subjected to separation.

Process for producing PU foams by reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts that catalyse the isocyanate-polyol and/or isocyanate-water reactions and/or isocyanate trimerization, and optionally one or more chemical or physical blowing agents, with use of SiOC-bonded polyether siloxanes having branching in the siloxane moiety, prepared from branched siloxanes bearing acetoxy groups, wherein a sufficient amount of the SiOC-bonded polyether siloxane having branching in the siloxane moiety is added that the proportion by mass of this polyether siloxane (e) based on the finished PU foam is from 0.0001% to 10% by weight.

Provided herein is a masterbatch including a grafted silicone polyether and a porous inorganic nanoparticle, bacteria repellant polymer composites including the same, and methods of preparation thereof.

The present invention concerns a solid nanocomposite material consisting of a polymer-matrix in which are dispersed alkali metal, hydronium or ammonium salts of polyanionic components,

wherein the polymer-matrix comprises at least a linear or branched polymer or copolymer containing one or several poly(ethylene oxide) (PEO) chains, said polymer or copolymer being optionally crosslinked and each PEO chain having at least 4 ethylene oxide monomer units.

The present invention relates also to a photonic, e.g. optoelectronic, device comprising such a nanocomposite material.

Such material and device can be used as phosphorescence emitter, for crop growth lighting or for generating singlet oxygen.