HU185232B - Bituminous pvc insulating plate - Google Patents

Abstract

The invention relates to bitumen-containing PVC insulating sheets composed of the following layers: a) a 0.4-1.2 mm thick compact PVC foil optionally containing bitumen, b) a 0.4-2 mm thick closed-cell PVC foam layer optionally containing bitumen, c) a 0.1-1 mm thick layer for adhesion and assembling, and d) a separating layer ensuring the unwinding of the sheet. These sheets can be applied with excellent results to insulate bridges, runway panels and other structures against water and humidity.

Description

Patent: (73)

Hungarian Petroleum and Natural Gas Experimental Institute, Veszprém, Graboplast Cotton Weaving and Leatherette Factory, Győr (54,

BITUMENTARTALMU PVC INSULATING PLATE (57) OUTPUT

The present invention relates to an insulating sheet comprising bitumen.

A bitumen-containing PVC insulating plate

a) 0.4-1.2 mm thick PVC film, optionally containing bitumen,

b) 0.4-2 mm thick, optionally closed bituminous PVC foamed foam layer,

c) from 0.1 to 1 mm thick adhesion and assembly layer, and «

d) it consists of a coil and a separating layer.

The insulating plate is ideal for waterproofing water and moisture from bridges, slabs and other structures.

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The present invention relates to a PVC insulating sheet containing bitumen.

Due to unfavorable weather conditions, it is necessary to insulate road bridges, slabs made of cement concrete, other structures and buildings against rainwater. The durability of insulation has a decisive impact on the usability and lifetime of buildings. The commonly used bituminous insulation alone does not provide sufficient sealing due to dilatation movements and vibrations on bridges and track plates, so that rainwater easily accesses the surface resulting in soaking and surface corrosion (HJ Stosch: Bugs in bitumen road construction, Cologne, 1973) Page 133). Similar damage occurs to the insulation of other structures and works of art.

In practice, insulation with conventional bituminous paper is still the most common. The placement of these sheets of paper is carried out by embedding in hot bitumen. Paper-based bituminous sheets are easily damaged and start to rot in the vicinity of the injury. After the initial signs of damage, the failure of the insulation occurs rapidly. These damages occur mainly at the nodes, at the junction of the slabs and in the areas subjected to movements, and are therefore difficult to repair, and are extremely costly (V. Blaha: The lifetime of glued bituminous roof sheets, covers, Pozemni, Stávby, 1976, 4, 170-173 page).

In addition to paper sheet insulation, bituminous sheets and aluminum sheeting are also used in practice. The major drawback of these discs is that they are aging rapidly and that they can only be used in some places because of their weight, such as vertical insulation (Z. Reiter: Position of Heat and Water Insulation, Pozemni Stávby 1977, pp. 25 1, pp. 31-35; C. Quwet: Failure of Roof Insulation, Cahiers Technique du Moniteur, Paris, 1977, p.

No. 1 422 123 British patent discloses a waterproof plate-like cover consisting of two layers. One layer is a resilient material based on bitumen or carbon tar and added thereto, the other layer being a layer of adhesive applied to the first layer. This adhesive layer contains bitumen, rubber, filler, flux and occasionally resin. These materials are difficult to match and do not provide good watertightness.

In practice, two types of sheet insulation are known: insulation with self-adhesive insulating material and adhesive insulation. In most cases, self-adhesive insulating materials are used, but their production is still difficult, although such insulation materials are needed in modern insulation technology (C. Hildebrand: Plastics in Architecture, Technical Publisher, Budapest, 1977).

PVC films have been used more frequently in water and vapor insulation recently. These films have the flexibility of softening agents, their relatively high strength value, their low surface surface water absorbency, and their high chemical resistance, for insulation purposes. It is also advantageous to have these films hot-welded. The disadvantages of PVC films are related to the plasticizer content. Due to the migration of the plasticizer, the elasticity of the foils deteriorates and their surface water absorption is increased. In addition, the plasticizer structure determines the bitumen tolerance of the PVC films and their association with the bituminous insulation systems. Bitumen association is increasingly used as it reduces the flexibility of the films due to the migration of the plasticizer and is not capable of reliable insulation due to the dilatation effects due to the temperature change.

Known plastic-type insulating materials allow two-way - longitudinal and transverse - movement, while there is no possibility to reduce the effects and vibrations perpendicular to the perpendicular, so in many cases separate vibration reducing agents are required.

The invention is based on the recognition that it is necessary to provide an insulating material which can, to some extent, reduce perpendicular impact, shaking and pressure, and also delay and even eliminate the premature failure of bridges, tracks, structures and other structures.

The task was accomplished by developing a PVC insulating plate containing bitumen.

The bitumen labeled PVC insulating sheet of the present invention

a) a base layer (covering layer) containing bitumen,

b) sealed foam layer,

c) a self-adhesive and assembly layer and

d) it consists of a separating layer.

In the case of insulation, especially in the insulation of bridges and slabs, a layer of asphalt is deposited on the surface of the PVC insulating foil, the construction of which can only be ensured if the PVC film used contains bitumen. The production of such a bitumen-containing PVC film is described in FIG. Hungarian patent. According to this, a bitumen-containing film is prepared by dissolving blown or fluxed and blown, peptide-structured bitumen having certain characteristics in a part of the plasticizer used, while the other part of the plasticizer is exposed to the PVC and added to the bitumen solution. In this way, however, a solid film is obtained, in which the perpendicular effect is felt directly on the insulated object and the film does not eliminate or reduce the damage caused by shock and shaking.

The second layer of the bitumen-labeled PVC insulating sheet according to the invention comprises a sealed foam layer, which is combined with the bituminous solid sheet and is made of a material of the same composition as the solid sheet material. This is followed by a layer of adhesion and assembly, followed by a separating layer.

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The composition of the biluminous PVC insulation plate is as follows:

a) solid PVC film with a thickness of 0.4-1.2 mm, containing bitumen,

b) from 0.4 to 2.0 mm thick, ⁵ closed cell PVC foam layer comprising bitumen,

c) a layer of adhesion and build-up of 0.1 to 1.0 mm thick, and

d) a separating layer for unwinding.

The foam layer may be a plastic foam known in the art ¹⁰ and customary. primarily for braking perpendicular forces (pressure, shock).

In point c) of the in itself insulating properties and applied to the foam layer, providing layer ^{of 15} concentration and assembling task is to allow the sealing plate affixing be insulated surface perfectly close the gaps at the átlapolásnál and sealing attention, and to make adhesion, allow so its role is the most important in 20 e insulation.

Assembling with the adhesive layer and 50-80% by weight (parts by weight) 15 to 5% of bitumen by weight (parts by weight), tackifying agent, 12 to 2% by weight (parts by weight) mügumit, 23-13% by weight (parts by weight) softener, and optionally eset- ²⁵ it contains a filler at the load of the plasticizer.

The bitumen used here has a softening point of 45-120 ° C and a penetration of 100-20 (0.1 mm at 25 ° C). Bitumen B-90, K-3, 85/25 can be used for this purpose (Petroleum Products Manual, ³⁰ Technical Publisher 1978, Budapest), but mixtures of these can also be used.

Adhesiveness enhancing agent rosin (pine resin) or similar natural and synthetic resins, polybutene and ³⁵ or similar polymers can be used having a molecular weight of 850-1350 and a density of 0.85 to 0.95 and not more than 25. Preferred brcmszáma 950 ± 100 molecular weight, 0, 88 density and 20 bromine polybutenes. The preferred coloring point for rosin is ⁴⁰ 60-100 ° C and the acid number is 100-200 mg KOH / g.

As a sales agent, which increases the elasticity and insulating properties of the adhesion and build-up layer (e.g., salt resistance, wateryness), polymers that do not emerge from the bitumen and form a homogeneous system are used. Preference is given to using butadiene-styrene copolymers having from 60 to 75% by weight of butadiene. The copolymers have a density of 0.9-1.0, a tensile strength of 1800-2600 N / cm ² and an elongation at break of ⁵⁰ 500-1000%. Also suitable for this purpose are atactic polypropylene having a melting temperature of 130 to 175 ° C, a density of 0.8 to 0.9 and a penetration of 15 to 30.

The softening point of the adhesive layer is controlled by plasticizers used in the plastics industry. Of these, dioctyl phthalate is preferred, but vegetable and mineral oil materials are also suitable, namely those having a viscosity of 5 to 50 cSt at 20 ° C and a freezing point of less than 0 ° C and a flash point of 60 ° C above 150 ° C.

As a filler whose function is to modify the conditions of use and to reduce the specific use of other ingredients, particularly plasticizer, inorganic materials such as talc, sludge chalk and the like are contemplated.

The bitumen-containing solid topsheet and the production of closed cell foam are made of plastisol in an infinite steel strip, as an intermediate substrate, by a rubber roller, on two lubricants in a manufacturing operation.

The homogenization of the ingredients is preferably carried out on a planetary mixer and a single-cylinder rubbing machine with the following machine parameters:

machine speed 9 m / min gelling tunnel temperature when applying topcoat 200-250 'C foam layer application 260-280' C lubrication speed 1480 mm

In the preparation of the adhesion and build-up layer, the melted and 150-170 'C warmed bitumen is added to each of the constituents with constant stirring for the first time, then the other ingredients, and then for 3-4 hours. stir length.

The mass thus prepared is applied to the closed cell foam layer in such a way that the mass of the paste is set at 90-110 ° C and passed through an adjustable gap spacing knife (squeegee), while the foil foam is continuously fed to the lubricating knife. It is then co-wound away from the lubrication site with a separating layer, preferably siliconized paper.

The adhesion and build-up layer is also applied to the foam layer by first applying the above-mentioned mass to the siliconized paper coated with the separating layer and rolling the foil onto the hot side with the foam side.

The thickness of the adhesion and assembly layer can be controlled by adjusting the lubricating knife for both applications.

The characteristics of a bitumen-containing PCV insulating sheet according to the invention, exemplified by the present invention, may include:

no ^; non-average weight thickness total thickness solid topsheet foam layer adhesive and assembly layer width tensile break elongation tensile strength hi Resistance water absorption black

1700-1900 g / m ²

2,4 ± 0,1 mm 0,9 ± 0,1 mm 1,3 ± 0,1 mm 0,3 mm

900 ± 3% mm-500 ± 3% mm 80 N / cm 250%

N / mm ² -20 'C 0.3%

The preparation of the bitumen-containing PVC insulating sheet according to the invention is illustrated by the following examples.

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Example 1

A solid topcoat is prepared using 100 parts by weight of K 67 emulsion PVC, 25 parts by weight of K 60 emulsion PVC, 25 parts by weight of bitumen, 61 parts by weight of dioctyl phthalate plasticizer, 2 parts by weight of stabilizer and 2 parts by weight of epoxidized soybean oil in 0.9 mm thickness and then on this layer A foam layer of 1.3 mm thick is formed with 100 parts by weight of K 60 emulsion PVC, 24 parts by weight of bitumen, 56 parts by weight of dioctyl phthalate plasticizer, 2 parts by weight of stabilizer, 1 part of epoxidized soybean oil, 5 parts by weight of azodicarbonamide foaming agent. resin and 5 parts by weight of filler.

The temperature of the gelling tunnel is 235 ° C for the solid layer and 273 'C. for the foam layer.

On a siliconized paper used as a separating layer, apply an adhesive and build-up mass of the following composition at a thickness of 0.3 mm at 105 ° C.

bitumen 70 parts (%) 85/25 rosin 5 parts by weight (%) op.65-75'C polybutene 5 parts by weight (%) MW butadiene-styrenes 4 parts by weight (%) 950 ± 100, density 0.88 butadiene rol 60% by weight copolymer atactic 3 parts by weight (%) op. 140-150 'C polypropylene talc 6 parts by weight (%) density 2.2-2.3 Dioctyl phthalate 7 parts by weight (%)

polypropylene pine resin 10 parts by weight (%)

The physical data of the received insulating plate is the same as that of the plate produced according to Example 1.

EXAMPLE ³ The composition for the solid topsheet is made of 0.6 mm thick film and this 1 mm thick foam layer is formed from the composition of Example 1. The temperature of the gelling tunnel is 220-225 ° C, while the foam layer is 270-273 ° C.

Subsequently, the adhesive and assembly mask of the following composition is applied to the foam layer at a thickness of 0.5 mm and then associated with the siliconized paper by means of rollers.

bitumen B-90 50 parts by weight (%) bitumen K-3 atactic pine resin characteristics equal to ² ^ as in Example 1 weight fraction (%) 12 weight% (%) density: 0.8-1.8 wt. ) 8 parts by weight (%) of polypropylene dioctyl phthalate sludge chalk 30

The physical properties of the insulating sheet thus produced are as follows: tensile strength 68 N / cm, elongation at break 235%, tensile strength 9.5 N / mm ² , cold resistance ~ 18 'C, water absorption 0.3%.

Thereafter, the two materials thus prepared are combined by means of cylinders still warm, about 80-90 'Con, by inverting the adhesion and assembly layer with the foam layer.

The tensile strength obtained in this way is 80 N / cm, tear elongation 250%, tensile strength 10 N / mm ² , cold resistance -20 'C, water absorption 0.3%.

Example 4

A solid and foamy bituminous PVC film of the same type as described in Example 3 was applied with the following composite adhesion and assembly layer as described herein at 0.8 mm thickness.

Example 2

Apply the following composition to the solid and foam layer as described in Example 1 using the following method:

bitumen 68 parts by weight (%) technical weight - 14 parts (%) by weight of butadiene-styrene (%) rol copolymer atactic 3 parts by weight (%)

K-3 softening point 93 'C penetration 94 (25' C0, 1) viscosity 32 cSt (20 'C) flash point 158' C bitumen K-3 bitumen B-90 pine resin athletic polypropylene dioctyl phthalate epoxidized soybean oil sludge chalk weight ( %) 50 parts by weight (%) 10 parts by weight (%) by weight (%) by weight (%) 2 parts by weight (%) by weight the characteristics are the same as above

The properties and physical properties of the insulating sheet thus obtained are the same as those of Example 3.

The insulating capacity of the bitumen-containing PVC insulating sheet according to the invention was tested by rolling it over to concrete cubes overlapping with the adhesion and assembly layer towards the concrete cubes. The concrete cubes were previously treated with a solvent bitumen solution to remove dust.

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It has been found that the sheet adheres well to the concrete and has a completely watertight coating at the overlaps.

The peel strength of the insulating plates from the concrete at 180 ° C was 10 N / cm, while the shear strength was 200-250 N / 10 cm ² .

The adhesion of the insulating plate to the overlap was favorable as the peel strength was 6-8 N / cm and the shear strength was 100-130 N / 10cm ² .

In other tests, 4 cm overlapping test specimens were placed under 1 meter of water column pressure and tested for leakage. After one month, the insulated cubes remained completely dry, proving that the overlaps were completely closed.

Claims (1)

Patent claim Bitumen PVC insulating sheet, which a) 5 to 5 mm thick PVC foil containing 0.4 to 1.2 mm thick bitumen, b) 0.44 mm thick, sealed cylindrical PVC foam layer containing bitumen, c) from 0.1 to 1 mm thick adhesion and build-up layer, and θ d) unwinding separation layer, preferably siliconized paper, characterized in that the adhesion and assembly layer is 50-80% by weight bitumen, 15-5 a weight% adhesion enhancer such as pine resin and ⁵ pclibutene, 12-2 weight% butadiene-styrene copolymer and or or atactic polypropylene, 23-13 weight% plasticizer, namely n-octyl phthalate or vegetable oil epoxide; and, where appropriate, a filler-based filler, namely talc, sludge chalk. Without a figure 5th Edition of the National Inventory Office felel for release: Zoltán llinier Head of Department Publisher of the Technical Publisher Szedte is the Printing House of the Printing Industry (868717/09) COPYLUX Printing and Reproduction Small Cooperative