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Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products
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Abstract
A method for modifying, especially elasticizing or elasticizing polystyrene foamed materials, manufactured under the action of auxiliary expansion agents, possibly after a pre-foaming process in the thermoplastic temperature range of this synthetic material, according to procedures known per se the action of the heat, possibly in molds or containers, possibly under pressure or also with the use of characterized pressure differences, because directly after the final foaming is cooled immediately and as quickly as possible at least up to room temperature, preferably in a water bath, and before an essential compensation of the vacuum produced by the cooling of the expansion gases in the individual grains of the finished foam material, preferably immediately after cooling, is densified with a pressure of at least 2 kg/cm2 , preferable from 5 to 30 kg/cm2. (Machine-translation by Google Translate, not legally binding)
ES0315618A1964-08-101965-07-21A procedure to modify foamed polystrene materials. (Machine-translation by Google Translate, not legally binding)
ExpiredES315618A1
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