CS264982B1 - Roofing - Google Patents

Abstract

The essence of the solution is roofing which comprises at least one functional layer based on styrene-2-ethylhexylacrylate copolymer. The solution can be used in construction organizations involved production of roofing materials

Description

The invention relates to a monolithic seamless roof covering which, in order to increase durability, efficiency and economic benefits, comprises a co-depositing layer which provides waterproofing, expansion, strength, frost-resistance and weight requirements for flat roof coverings.

To date, roofing has been made using preformed polymer films based on polyvinyl chloride, polyethylene, chlorosulfopolyethylene with additional layers, e.g. bonded gravel, asbestos-based, water-impermeable asbestos-cement and the like, sometimes also with polymeric films, asphalt coatings and mats in combination with metal foil. It is also known to use asbestos felt and melamine resin, . The use of sound and heat-insulating layers of penoplastics, e.g. polyurethane and polystyrene, in particular in combination with bitumen paper.

Roof coverings which do not contain, respectively. contain reinforcing pads, usually formed by applying ionic or non-ionic asphalt emulsions! alone or combined with a mixture of a cationic bitumen emulsion and a rubber emulsion.

In addition to the indisputable advantages, said coverings bear a number of disadvantages which cause the known problems of flat roofs. Glued polymer foils or bituminous bands melted onto the substrate due to poor quality material, work and aging of the part allow in joints, which is reflected in the fulfillment of the waterproofing function. The roofing thus converted hardens at lower temperatures and bursts when the roof structures deflect above the support due to negative moments. Due to the sun's heat, it becomes a plastic tint that even slight mechanical stresses also result in damage. Most bitumen coverings are non-absorbent and thus frost-resistant, but any of these leaks will cause the crack to grow after each freezing and eventually cause leakage. Other disadvantages include high weights and roofing costs with respect to durability and laboriousness.

Attention should be paid to the use of an insulating layer comprising a textile insert impregnated with an acrylate emulsion, respectively. repairing the roof with a polyacrylate-based sealant, as well as polymethyl methacrylate roofing.

This group of acrylate-based coverings is expanded by the present invention, according to which the monolithic roofing consists of a textile reinforcement insert and layers with the function of a penetration, waterproofing or protective coating, at least one of which is based on a styrene-2-ethylhexyl acrylate copolymer.

An advantage of the roofing according to the invention is its low-profile construction. The structure is sufficiently flexible so that it can withstand shape changes and does not change its properties due to weather conditions. The structures are characterized by low weight. Other advantages are the achievement of efficiency gains, durability and substantial economic benefits in terms of the availability of raw materials.

The layers are formed by applying a styrene-acrylate dispersion by coating and / or spraying.

In these systems, small amounts of acrylic acid are polymerized with other monomers and their subsequent neutralization contributes to stabilizing the latex. The addition of coalescent substances is suitable. Further, they may be in an aqueous dispersion! protective colloids, thickeners, diluents, fillers, crosslinkers, biocidal agents and flame retardants. Homopolymers or copolymers of vinyl acetate can be added to the styrene-acrylate dispersion without loss of action.

The invention2 is explained on the basis of exemplary embodiments, which are not particularly limited, since it may take the form of other alternatives, e.g. with regard to the number, quality and depth of the functional layers of the roof structure.

Excluded κ available! is an aqueous dispersion based on styrene-2-ethylhexyl acrylate (dry matter content 50%), micronized pad, jute reinforcing textile insert (mesh 3 mm mesh), chlorine rubber based material (7.28 wt.%) - specified mol. weight> 3 000, chlorine content 65 S and humidity 0,2%, organic solvent - toluene (23,31 w / w) and acetone (2,39 w / w)

In the concrete substrate is applied the mixture of an aqueous dispersion based on styrene-2-ethylhexyl acrylate mixed with ^t micronized limestone in the mass ratio of 2: 1. A jute fabric insert is then laid which has a dispersion to a depth of 3 mm. After this layer has solidified, a protective layer based on chlorine rubber is applied to a total depth of 3.5 mm.

Example 2

Available are a homopolymer aqueous dispersion based on polyvinyl acetate with 20% dibutyl phthalate (dry matter content 55 ΐ), a dispersion based on styrene-2-ethylhexyl acrylate (dry matter content 50%), micronized limestone, a polyamide-6- based nonwoven reinforcement (thicknesses) 1 mm).

A polyvinyl acetate-based dispersion is applied to the concrete substrate, after another fresh coating of the dispersion, a polyamide 6 textile insert is laid and the same dispersion is cast to a depth of 3 mm. After this layer has solidified, a protective layer based on styrene-2-ethylhexyl acrylate is applied, as in Example 1, to a total depth of 5 mm.

The solution according to the invention can be used in building organizations engaged in the production of roofing.

Claims (1)

OBJECT OF THE INVENTION Roofing comprising functional layers with a reinforcing layer, characterized in that it comprises at least one layer based on styrene-2-ethylhexyl acrylate copolymer.