DE1943433A1 - Sound insulation plaster - contng shredded polystyrene foam - Google Patents

Abstract

Insulation is applied directly over absorptive concrete or normal plaster and contains (in%) 49 gypsum, 33 vermiculite and/or pearlite, 1 shredded Styropor (RTM), 4 talcum or white alumina, 8 asbestos, 4 TiO2 and 1 binder. Spec., the plaster applied on a base with low absorptive capacity contains (in%) 23 vermiculite and/or shredded Styropor (RTM), 46 whiting, 23 white alumina and/or talcum, 6 asbestos and 2 binder.

Description

"Acoustic plaster" The invention relates to an acoustic plaster, especially for use as ceiling puts.

It is known that a porous mass is necessary for good sound absorption and a porous surface are required.

The absorption capacity of a normally applied plaster finish for sound, for example, is only in the order of 1%, so it is extremely low. With acoustic plasters, sound absorption levels of 20 - 80 * can be achieved. From it Manufactured coatings have the advantage of non-flammability over organic substances. The effective pores are either in porous aggregates, such as expanded mica, expanded lava, Expanding slag, pumice, lime, etc., preformed, or they are in the setting mass by gas-releasing substances or by stirring in air bubbles, supported by Foams. A combination of both types of pores is also common.

The invention is based on the object of an acoustic plaster, in particular for use as ceiling plaster, which in addition to good sound absorption properties special advantages in terms of decorative effect, durability and workability having.

This object is achieved according to the invention by an acoustic plaster, consisting of: 490 gypsum 33% vermiculite and / or perlite R 1% styrofoam, chopped 4% talc or white clay 8% asbestos 4% titanium dioxide 1% binder.

The mixture according to the invention only requires processing the addition of water. It can then be sprayed directly onto suction concrete or conventional plaster or plasterboard ("Rigips" registered trademark) where you can do without armor up to a ceiling height of 5 m.

With an application of approx. 12 mm, a degree of sound absorption is already achieved of about 60%. It has been shown that there are no hairline cracks when the Underground is affected. Contamination that occurs over time can can be removed with a soft suction brush. In addition, it is possible at any time to apply a new paint job.

The first coloring of the plaster is expediently done before processing by adding the desired color.

With all of these advantages described, the inventive Plaster still has the advantage that its use leads to a cost saving of leads to about 50% compared to conventional plastered ceilings.

If the surface is not very absorbent, we recommend using a Variant of the plaster according to the invention. This is composed as follows: 23% Vermiculite and / or perlite and / or StyrofoamR chopped 46% whipped chalk 23% white Clay and / or talc 6% asbestos 2% binder The properties of this mixture correspond essentially the first described.

-Patent claims-

Claims (2)

P a t e n t a n s p r ü c h e 1. Acoustic plaster for the immediate Application on suction concrete or conventional plaster, consisting of: 49% gypsum 33% vermiculite and / or perlite 1% styrofoam, chopped 4% talc or white clay 8% asbestos 4% Titanium dioxide 1% binder. 2. Plaster for less absorbent surfaces, consisting of: 23% Vermiculite and / or Perlite and / or StyroperR, chopped 46% whipped chalk 23% white Clay and / or talc 6% asbestos 2% binder