摘要:
The present invention relates to expandable styrene polymers containing recycled polystyrene, having a recycled material content of from 10 to 50% by weight, based on the total weight of the polystyrene, to which alkyldi(2-hydroxyethyl)amines have been added during the polymerization.
摘要:
A process for the preparation of bead-form expandable styrene polymers by polymerizing styrene, if desired in the presence of further comonomers, in aqueous suspension in the presence of organic molecular colloids as suspension stabilizers and conventional styrene-soluble polymerization catalysts and with addition of a blowing agent and, if desired, conventional additives in effective amounts, wherein the aqueous suspension contains at least one olefinically unsaturated carboxylic acid or a water-soluble salt thereof in an amount, based on the organic phase, of from 0.002 to 0.3% by weight of carboxylate anions.
摘要:
Expandable styrene polymers containing recycled polystyrene have a content of recycled material of up to 40% by weight, based on the total weight of the polystyrene, wherein, in the course of the polymerization of the reaction mixture, from 100 to 500 ppm of a molecular weight regulator and/or from 0.05 to 1.0% by weight, based in each case on the polymerization solution, of a finely divided polyethylene wax are added.
摘要:
A process for the deodorization of used foam moldings, in which the used foam moldings are treateda) with an aqueous solution of phosphoric acid, water-soluble primary or secondary phosphates or mixtures thereof.
摘要:
Bead-form, expandable styrene polymers containing, based on the styrene polymer, from 0.005 to 1.5% by weight of polyethylene wax and from 0.005 to 1% by weight of dimeric .alpha.-methylstyrene, and a process for the preparation thereof.
摘要:
A liquid-impregnated shaped foam article consisting ofa) from 1 to 10% by volume of an open-cell foam based on an aminoplast andb) from 90 to 99% by volume of a component which is liquid at 25° C., such as aromatic or aliphatic hydrocarbons, alcohols, ketones, water or aqueous dispersions, and the uses thereof for transporting or metering liquids, for cleavage through freezing, for energy absorption of projectiles or as latent heat stores.
摘要:
The invention relates to a process for the preparation of bead shaped, expandable polystyrene by the polymerization of styrene in an aqueous suspension in the presence of dimeric .alpha.-methylstyrene as a regulator and a C.sub.3 to C.sub.6 hydrocarbon as a blowing agent, whereby one first reports the content of saturated hydrocarbons, having a boiling point between 70.degree. and 170.degree. C., in the styrene and dimeric .alpha.-methylstyrene, and then enough saturated hydrocarbons, having a boiling point from 70.degree. to 170.degree. C., are added before, during or after the polymerization so that their total content in the suspension is from 0.1 to 0.8 weight percent, based on the styrene.
摘要:
The present invention relates to a composite component comprising an unfoamed polymer phase and a foamed phase, and to a process for producing the same.
摘要:
The present invention relates to an extruded foam based on at least one polymer selected from polysulfone or polyether sulfone, polystyrene, or a copolymer produced from styrene, where the extruded foam comprises at least one mineral filler with a particle sizes ≦10 μm, and comprises at least one nucleating agent based on a wax or on an oligomer containing epoxy groups.
摘要:
The present invention relates to a composite component comprising an unfoamed polymer phase and a foamed phase, and to a process for producing the same.