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DE-202026100974-U1 - Material for sound and heat insulation as well as a system for screed renovation

DE202026100974U1DE 202026100974 U1DE202026100974 U1DE 202026100974U1DE-202026100974-U1

Abstract

Material for sound and heat insulation between a first structural component and a second structural component adjacent to the first structural component, with a material composition suitable and designed to have a flowable processing consistency in a first state and a flow-resistant construction consistency in a second state, characterized in that the material composition comprises a granulate of expanded polystyrene bound in an aqueous polymer matrix and a thixotropic agent, wherein the effect of the thixotropic agent leads to the second state in which the flow-resistant construction consistency is present.

Assignees

  • JATI GmbH

Dates

Publication Date
20260513
Application Date
20260223
Priority Date
20260223

Claims (9)

  1. Material for sound and heat insulation between a first structural component and a second structural component adjacent to the first structural component, with a material composition suitable and designed to have a flowable processing consistency in a first state and a flow-resistant construction consistency in a second state, characterized in that the material composition comprises a granulate of expanded polystyrene bound in an aqueous polymer matrix and a thixotropic agent, wherein the effect of the thixotropic agent leads to the second state in which the flow-resistant construction consistency is present.
  2. Material according to Claim 1 , characterized in that the flow-resistant construction consistency is elastic.
  3. Material according to Claim 1 or 2 , characterized in that the expanded polystyrene granules comprise granules with a grain size of 0.1 to 2.0 mm.
  4. Material according to one of the Claims 1 until 3 , characterized in that the aqueous polymer matrix is based on a vinyl acrylate copolymer.
  5. Material according to Claim 4 , characterized in that the aqueous polymer matrix is based on a vinyl acetate copolymer.
  6. Material according to one of the preceding claims, characterized in that the thixotropic agent is produced on the basis of an agent from the group consisting of methylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, guar gum, locust bean gum, tamarind bean gum, gum arabic, tragacanth gum, agar-agar, carrageenan, sodium alginate, xanthum gum, gellan gum, pullulan, potato starch, corn starch, wheat starch, bentonite, attapulgite, and sepiolite.
  7. Material according to Claim 6 , characterized in that the material composition in the first state comprises 60-80 wt.% water, 2-8 wt.% corn starch or potato starch, 10-30 wt.% acrylate dispersion, 1-10 wt.% expanded polystyrene granules, and 0.01-0.5 wt.% preservative.
  8. System for the renovation of a screed at a wall area, wherein an edge strip is installed between the screed and the wall area, characterized in that an edge joint is formed between the renovated screed and a wall area without an edge strip, into which a material, in particular according to one of the Claims 1 until 7 is introduced in a first flowable state and hardens until the second flow-resistant state is reached.
  9. Containers consisting of a vessel and a material according in particular to one of the Claims 1 until 7 , characterized in that the container has a plastic container with a dispensing opening into which the processable, pasty material is filled, wherein the plastic container has a substantially airtight resealable lid for the dispensing opening.

Description

The invention relates to a material for sound and heat insulation between a first structural element and a second structural element adjacent to the first structural element, comprising a material composition suitable and designed to exhibit a flowable processing consistency in a first state and a flow-resistant construction consistency in a second state. Furthermore, the invention relates to a system for the renovation of a screed in a wall area, wherein an edge strip is installed between the screed and the wall area. During screed work, an edge strip is typically installed between the screed and the wall to prevent sound bridges, provide insulation against cold, and accommodate screed movement. However, during renovations, for example following water damage, this edge strip is often removed to ensure thorough drying. Currently, no adequate replacement is provided in such cases, leaving the renovated area without an edge strip for sound decoupling, thermal insulation, and movement absorption. This results in a structural defect or, at the very least, an area where the screed meets the wall that has been inadequately repaired. Common materials such as mortar, polyurethane foams, or sealants are either too hard, not elastic enough, difficult to work with, or prone to phase separation. Furthermore, they cannot be reliably applied in narrow perimeter joints. The invention is based on the objective of providing a material and a system with which, after a renovation of a structural building element, in particular a screed, a condition can be essentially restored between this and an adjacent structural building element, in particular a wall, as existed before the renovation. The object is achieved according to the invention by the material composition comprising a granulate of expanded polystyrene bound in an aqueous polymer matrix and a thixotropic agent, wherein the effect of the thixotropic agent leads to the second state in which the flow-resistant construction consistency is present. An advantage of the present invention is that the material can be sold in small volumes, particularly air-dried, and only mixed with water on-site in the required quantity to allow it to be processed, preferably in a paste-like consistency. After processing, it can harden to achieve a flow-resistant, construction-grade consistency. Preferably, however, the material is supplied ready-to-use as a paste in a plastic bucket. At the point of use, the paste-like material can be drawn up with a mortar pump and then applied to a perimeter joint. In this case, adding and mixing on-site is unnecessary. A further advantage of the present invention is that the flow-resistant material is elastic. As it hardens to an elastic consistency, the material becomes a fully-fledged replacement for the missing edge strip at the end of the processing and can even exhibit better sound absorption properties. It is also an advantage of the present invention that the expanded polystyrene granules comprise grains with a particle size of 0.1 to 2.0 mm. These particle sizes ensure a low density while maintaining an excellent paste-like consistency for processing and an elastic consistency for construction. Initially, rubber granules were tested as an insulating material. However, despite the elastic polymer matrix, the resulting end product was too hard. In contrast, the use of polystyrene beads led to a significantly more elastic mass. Different particle sizes were investigated; smaller particle sizes proved to be particularly easy to process and resulted in a homogeneous, elastic structure. A further advantage of the present invention is that the aqueous polymer matrix is based on a vinyl-acrylate copolymer, and in particular a vinyl acetate copolymer. During development, various binder matrices were investigated. PU dispersions proved unsuitable because they become too hard after curing. Acrylate and vinyl acetate dispersions, on the other hand, showed significantly higher elasticity and are also more cost-effective. Therefore, an acrylate dispersion was chosen as the base. However, the invention is not limited to such an acrylate dispersion as the binder matrix. Alternatively, other materials can also be used, especially those based on a vinyl-acrylate or vinyl acetate copolymer. However, simply mixing acrylate dispersion and polystyrene granules resulted in poor applicability. Adding water created a pumpable slurry that could be easily applied to the perimeter joint between the first structural element, especially the screed, and the second structural element, especially the wall. However Phase separation occurred between the water and the granules, which impaired their shelf life. A thixotropic agent was therefore added for stabilization. A further advantage of the present invention is therefore that the thixotropic agent is produced on the basis of an agent from the group consisting of methylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulos