LOW-DENSITY SEALING MASS, GROUND MASS AND METHOD FOR PRODUCING THE SAME AND THE USE THEREOF

摘要

The invention relates to a sealing mass with low density and improved tensil e strength on the basis of sulfur-containing polymers such as on the basis of polysulfide, polyether or/and polytioether that has a density of not more th an 1.3 g/cm3 according to ISO 2781 and a tensile strength of at least 1.9 N/mm2 according to ISO 37 after curing. The invention further relates to a ground mass based on sulfur-containing polymers for producing a sealing mass that comprises at least one long-chain linear polymer and at least one short-chai n branched polymer having a content in trifunctional molecules, or/and at leas t one multifunctional cross-linker with a number of functional groups n >= 3. The invention further relates to a method for producing a sealing mass according to which at least one base polymer is mixed with at least one adhesion promoter and the at least one light filler, especially hollow fille r, is added, a vacuum with a remaining pressure of less than 50 mbar being maintained during incorporation of the light filler.