Abstract:
The invention relates to a method for producing expandable polystyrene with a molecular weight Mw in excess of 170,000 g/mol. According to the invention, a styrene polymer melt containing an expanding agent and having a temperature of at least 120 DEG C is passed through a spinneret comprising bores, whose diameter at the spinneret exit measures a maximum 1.5 mm, and is then granulated. The invention also relates to expandable styrene polymers (EPS) with a molecular weight Mw of more than 170,000 g/mol and between 0.05 and 1.5 wt. % inherent moisture.
Abstract:
Peptides derived from TNF, of formula (I): X-A-Gly-Asp-Y, in which A X and Y have the meanings given in the description. Process for producing them. The novel peptides are useful therapeutic agents.
Abstract:
The invention relates to a method for the production of flameproof, expandable styrol polymers (EPS) by extruding a styrol polymer melt containing a propellant and flameproof agents through a nozzle plate with subsequent under water granulation. The residence time of the flameproof agent is less than 30 minutes at a melting temperature in the region of between 140 to 220 °C.
Abstract:
An anti-lumping agent for use with expandable polystyrene beads is disclosed. The expandable polystyrene beads comprise a styrene or styrene derivative polymer in combination with a blowing agent. Typical blowing agents are C3-C6 hydrocarbons, with pentane being especially preferred. The anti-lumping agents include block copolymers formed from blocks of ethylene oxide and propylene oxide. Preferably, the copolymers have a number average molecular weight of from about 4,000 to 15,000 g/mol, and a hydrophilic-lipophilic balance number of from about 16 to 29. The anti-lumping agents significantly reduce the lumping potential of the expandable polystyrene beads, especially when they are expanded to low densities of from about 12.0 - 24.0 g/l (1.5 to 0.75 lbs. per cubic foot), and more preferably to densities of from about 13.6 - 19.2 g/l (1.2 to 0.85 pcf).
Abstract:
Expandable styrene polymer granules with halogen-free flame retardancy, comprising a) from 5 to 50% by weight of a filler selected from pulverulent inorganic substances such as talc, chalk, kaolin, aluminum hydroxide, aluminum nitrite, aluminum silicate, barium sulfate, calcium carbonate, titanium dioxide, calcium sulfate, silica, quartz flour, aerosil, alumina or wollastonite, and b) from 2 to 40% by weight of expandable graphite having a mean particle size in the range from 10 to 1000 mum, c) from 0 to 20% by weight of red phosphorus or an organic or inorganic phosphate, phosphite or phosphonate, d) from 0 to 10% by weight of carbon black or graphite, and processes for their preparation and use for preparing self-extinguishing polystyrene particle foams.
Abstract:
The invention relates to a thermal insulation composite, comprising two metal sheets with a thermally-insulating core material, whereby, between the thermally-insulating core material and at least one of the metal sheets, a fire protection layer with an intumescent mass is arranged. The invention further relates to a method for production thereof and use thereof for the manufacture of storage or refrigerated warehouses.
Abstract:
Moldable-foam moldings whose density is in the range from 8 to 200 g/l, obtainable via fusion of prefoamed foam beads composed of expandable pelletized filled thermoplastic polymer materials, and a process for preparing the expandable pelletized polymer materials.
Abstract:
A process for producing foam moldings from prefoamed foam particles which have a polymer coating under pressure in a mold in the absence of steam, and also foam moldings produced therefrom and their use.