Abstract:
A polymer sheet includes a polyurethane core. The polyurethane core has a first major surface and a second major surface opposite the first major surface. The polymer sheet can have at least one functional layer overlying a major surface. The polymer sheet has a thickness t PS . The polyurethane core has a thickness t PC . In embodiments t PC can be at least 0.5 tps. The polyurethane core can have at least one of the following property: (i) a Scratch Resistance Rating, as further described herein, of not greater than about 10 wt%, (ii) an elongation at break of at least 200 %, (iii) a tensile strength at break of at least 0.5 MPa, (iv) a loss of tensile strength of at least 5% when exposed to UV light according to standard ASTM D2565-99. The polymer sheet can be used for gaskets or bonding tapes.
Abstract:
Die Erfindung betrifft einen porösen polymeren Monolith basierend auf einer polymerisierten Emulsion mit hoher innerer Phase (polyHIPE), der hypervernetzt ist sowie deren Herstellung und Verwendung vorzugsweise als Gasspeichermaterial.
Abstract:
A method for producing closed cell polymer foam layers is characterized in that an emulsion which can be spread or smoothed out is produced from a solution of one or more polymers in one or more organic solution medium(s) in the form of a coherent exterior Phase A and a liquid which is to be evaporated in the form of a dispersed inner Phase B. The solution medium or the solution medium mixture of Phase A contains a higher level of liquidity than that of Phase B.
Abstract:
Process for making polyisocyanate based aerogels by trimerisation of an organic polyisocyanate in an organic solvent in the presence of a (co)polymer containing an isocyanate-reactive group, gellation and supercritically drying of the obtained sol-gel.
Abstract:
Relatively thin, collapsed, i.e. unexpanded, polymeric foam materials that, upon contact with aqueous body fluids, expand and absorb such fluids, are disclosed. A process for consistently obtaining such relatively thin, collapsed polymeric foam materials by polymerizing a specific type of water-in-oil emulsion, commonly known as High Internal Phase Emulsions or "HIPE", is also disclosed.
Abstract:
Normally hydrophobic foams, such as polyurethane foams and polymerized water-in-oil emulsion foams, are rendered hydrophilic by means of treatment with simple surfactants and hydrophilizing agent salts. Thus, a surfactant-containing foam is treated with a solution of, for example, calcium chloride, and is dried to leave a substantially uniformly distributed residue of hydrated or hydratable calcium chloride on the surfactant-containing internal foam surfaces. In use, the combination of surfactant and calcium chloride hydrate provides a hydrophilic surface to the foam. Other hydratable calcium or magnesium salts such as magnesium chloride can be used. The resulting hydrophilized foams are suitable for use in absorbent devices, including diapers, sanitary napkins, bandages, and the like.
Abstract:
Disclosed is a process for production of a colored polyimide molded article including the steps of molding a polyamic acid solution composition containing a polyamic acid solution obtained from at least a tetracarboxylic acid component and a diamine component and a coloring precursor, or a polyimide solution composition containing a polyimide solution and a coloring precursor; and then thermally treating a molded product at 250°C or higher.
Abstract:
The present invention relates to a colloid composition for forming a foam sheet including: polylactic acid resin particles having an average diameter of 1µm to 100µm obtained by pulverizing fibrous particles of a polylactic acid resin.
Abstract:
Porous particles can be prepared using an evaporative limited coalescence process in which one or more discrete cavities are stabilized within the continuous polymeric solid phase of the porous particles. The one or more discrete cavities have inner walls and are dispersed within the continuous polymeric solid phase. The porous particles further comprise a cavity stabilizing hydrocolloid on the inner walls of the one or more discrete cavities, and an amphiphilic (low HLB) block copolymer that is disposed at the interface of the discrete cavities and the continuous polymeric solid phase.