NL8800950A - BITUMEN-BASED COLD-BINDING AGENT. - Google Patents

Description

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Bitumen-based cold-binding agent

The invention relates to a cold-binding, two-component agent that is applicable in the construction industry.

In many areas of the underground and aboveground construction industry there are adhesive and joint sealing tasks of such a nature that they cannot be fulfilled with hot bitumen sealing compounds, or in many cases even with solvent-containing or emulsion products. Various products on two-component epoxy resin or polyurethane base, such as coal tar and / or bitumen, are available for the piece-like repair of roof insulation or for the sealing of expansion joints in high-quality construction objects (bridges, tunnels, cladding rings) and for the filling of joints. also contains solvents. The disadvantage of this is that they can generally only be used for specific, specific adhesion purposes, or that they contain 40-50% solvent and are therefore environmentally polluting and fire-hazardous.

The solvent or aqueous emulsion-containing, also cold-processable bitumen compositions cannot be used eg for purposes in which the drying of the adhesive film is not guaranteed, or the decrease in volume (shrinkage) occurring during the drying cannot be used, such as, for example, in the case of adhesion of waterproofing plates with one another or when filling expansion joints. Tar epoxy or bitumen epoxy masses with a high filler content are generally known for the repair of concrete streets and tracks, since they adhere well to concrete and have the desired elasticity. Due to the high costs, these 30 are only used for special construction objects, eg for the repair of airport runways. Epoxy resin based adhesives resp. rubber and synthetic rubber adhesives are known. For the joint sealing one uses sealants and fillers on a plastic basis, such as products on the basis of polysulfide, butyl rubber, polyisobutylene, polyurethane or on the basis of silicone rubber. Disadvantages are .8800950 r: -2-4f, however, the high costs, as a result of which these are only spread to a limited extent.

The disadvantage of the known products is on the one hand their costlyness, on the other hand the fact that they cannot be used for different application purposes. It is, for example, an unresolved task that the adhesive expands automatically in the required layer thickness and thereby removes the unevenness of the surface, or that the position of the material to be adhered is also corrected resp. . can be regulated. The permanent plastic properties can only be achieved by adding expensive plastics, usually also the use of solvent cannot be avoided.

The object of the invention is to provide a cold-applicable, permanent plastic agent with adjustable binding time, which is suitable for multiple applications, is water- and solvent-free and easy to treat; their use does not present any disadvantages for health or the environment.

According to the invention, the two-component agent, which is water and solvent-free and cold-binding, is characterized in that Component A

40-60 wt% bitumen or bitumen modified with 2-6 wt% polybutadiene-polystyrene 20-40 wt% liquid fatty acids 20-40 wt% filler, and

30 Component B

10-20% by weight of 5-10% by weight of sulfur-containing liquid factis prepared from drying or semi-drying vegetable oil and sulfur, 10-20% by weight of zinc oxide, magnesium oxide, alkaline earth metal oxide or hydroxide, or mixture thereof 60-80% by weight of filler, preferably quartz flour or sand with a grain size of 0-3 mm. 8 8 0 0 £ Γ · 0 - 3 - * and the mixing ratio between components A and B is 1-3: 3-1.

The other embodiment of the water- and solvent-free, cold-binding, two-component agent according to the invention is characterized in that Component A 40-60 wt.% Bitumen 20-40 wt.% Liquid fatty acid with an average of 17-18 carbon atoms or naphthenic acid 10 5-10% by weight of sulfur factis prepared from pretreated rapeseed oil and sulfur with a total sulfur content of 17-19% by weight, and

Component B

15 10-20 wt% zinc oxide, magnesium oxide, calcium oxide (quicklime) or hydroxide, or chlorine lime or mixture thereof contains 10-90 wt% filler 1-20 wt% rubber meal 20 and the mixing ratio between components A and B 1 -3: 3-1.

The bitumen is increased by 2-8% by weight resp. 2-6 wt% thermoplastic mixed polymer of the type SBR or SBS modified. Such products are Europren 161A and 25 161B (Enichem, Italy), Catiflex 1101, 1184, 1186 (Shell

Co.), Finapren 411, Claprene (Shell). The molecular weight of these products (synthetic rubber) is 120-280,000. The liquid fatty acid can be tallow oil fatty acid, the iodine value of which is 84-92. As fatty acids, tallow fatty acid, technical fatty acid with an iodine number of 20, saponification number 185-210, sunflower oil fatty acid, rapeseed oil fatty acid, palm kernel oil fatty acid, coconut oil fatty acid or linseed oil fatty acid can be used.

The inert filler with a grain size of 0-1 mm is sand or quartz flour, andesite, basalt, rock flour, talc, kaolin, bentonite, or clay, microsilica powder, clay hydrate, corundum flour, asbestos fiber, mineral wool, plastic fiber, viscose fiber, etc., or mixtures thereof. The drying or semi-drying oil suitable for the factis preparation is. 8 8 0 0 8 5 C '- 4 - Sunflower, turnip, cottonseed, pumpkin seed, sesame, hemp seed, olive, soy, fish, corn, linseed or castor oil, of which the iodine number is 80 -200, although a drying plant oil varnish can also be used.

The quality and composition of the inert filler may be the previous one, however the use of sand with a grain size of 0-1 mm is advantageous. The ratio of components A and B may vary within the stated limits, however, it should be noted that for adhesion purposes the use of a 2: 1 mixture while a 1: 1 mixture is effective for joint sealing purposes.

The agent according to the invention is prepared such that bitumen above its softening point, expediently between 160-180 ° C, is mixed stepwise with stirring with the thermoplastic SBS mixed polymer, to the homogenized mixture with vigorous stirring of the liquid oleic acid and the still warm mixture the filler

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, cool the mixture to 30 DEG-40 DEG C. and store the resulting component A separately.

In a separate step, a factis with a total sulfur content of 8-10% by weight is boiled from drying plant oil and sulfur. After cooling, the zinc or magnesium oxide or the mixture is mixed until homogenization. the alkaline earth metal oxides, after which the component B thus obtained is homogenized after addition of the fillers. Compliance with the mixing order of the components is effective; the stability of the product improves if the indicated mixing sequence is used.

It is alternatively mixed in the preparation

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of component A the bitumen at 160-170 C with hard or semi-hard factis, then with oleic acid, while in a separate step the zinc or magnesium oxide or the alkaline earth metal oxides resp. the chlorine lime, the fillers and the rubber flour are added and homogenized.

The essential condition for the use of the product is the full and complete mixing of components A and B, which generally involve mixing times of 5-10 minutes * 8 8 0 L i 5 i?

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- 5 - are sufficient. The processing time of the liquid, mortar-like mass, depending on the temperature, is 2-2.5 hours, although the processing time is extended, or by adding an aliphatic carboxylic acid to component A, at most 5% 5 based on the mass of the same, essentially can be shortened, and can be controlled essentially between 10 minutes and 24 hours. During the processing time, the mortar-like mass does not thicken, spreads well on its own, while after a certain time the ligation suddenly starts, and the mass hardens in 10-15 minutes, but the permanent plastic state remains.

The composition of the agent according to the invention is new, and a similar bitumen-containing adhesive or a similar agent for sealing the joints is not commercially available and is not known. The ligation of the agent takes place in a cold state at ambient temperature, preferably at temperatures

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of approximately 20 C and probably consists of 3 sub-processes:

The saponification between the metal oxide 20 used and the free fatty acid forms a bond, the duration of which can be regulated. By adding an aliphatic carboxylic acid, this time can be shortened, by adding factis, the bond can be prevented, so that the duration is longer. Simultaneously with this process, partially or completely cross-linked bonds are formed between factis, metal oxide, unsaturated fatty acid and optionally the unsaturated bonds of the synthetic rubber. In the layers of bonded mass which are in contact with air and light, the unsaponified residue of the semisaturated plant oil and of the unsaturated fatty acid hardens for a relatively long time under oxygen uptake, whereby the mass used “hardens”. This can be determined by from the cessation of stickiness and a slow increase in the softening point.

The agent according to the invention has the advantage that the layer thickness can be varied when used; it is not necessary to take into account the rapid start of the ligation; the mass "expands. 8 8 0 D ü 5 u f - 6 - expands". As a result of the controllability, the position (location) of the materials to be adhered can also be adjusted after the construction, whereby the material to be adhered is neither damaged by heat action nor by chemical action. After use, the mass constantly remains plastic and takes over the movements without cracks. The mass adheres well to a dry base, then the layer becomes moisture-resistant, does not absorb water and also binds under water. In the practical application of the agent, the adhesion, joint sealing or other work can be carried out with simple devices without risk of fire and harm to health, and does not require any workmanship. The agents according to the invention can be used, inter alia, for joint filling in concrete footpaths, roof insulation elements, for adhesion of parquet floors, roofing membranes. Its use is extremely economical, since the active substance content of the product can be composed of cheaply accessible components, while the properties of the agent can also be varied by changing the ratio of components A and B.

Further details of the invention are further elucidated on the basis of the following exemplary embodiments.

Example I

A mass suitable for joint casting was prepared from the following components:

Component A:

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38 wt% bitumen B-90 (softening point 46 C, penetration 71-100) 30 2 wt% styrene-butadiene mixed polymer (Europrene 161A), average molecular weight 280,000 20 wt% oleic acid (oleic) 40 wt% sand with a grain size of 0-1 mm 35 Component B: 10 wt.% liquid factis prepared from sulfur and sunflower oil with a sulfur content of 10 wt.% 8 8 0 0 b rh - 7 - 10 wt.% zinc oxide (zinc white) 80 wt.% sand with a grain size of 0-1 mm.

In component B, the plant oil can be partially or completely replaced by liquid coal tar or liquid gasoline pyrolysis tar.

For the preparation of component A, the bitumen was heated in a heatable stirrer

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Stir with vigorous stirring to 180 ° C with addition of the mixed polymer over 45-60 minutes. The oleic acid was then added to the homogeneous mixture, stirred vigorously for a few minutes, after which the still warm mixture was mixed with fine sand with further stirring. Stirring was continued under water cooling until the mixture was one

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temperature of 35-40 ° C. Then the black liquid product was filled into containers. In the preparation of component B, de factis was first prepared from drying plant oil and sulfur by mixing the plant oil

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Heated at 130 DEG-140 DEG C., adding the powdered or lamellar sulfur and stirring at this temperature for 3-4 hours, until complete sulfur incorporation. The resulting plant oil factis formed a dark brown, highly transparent, deposit and cloud-free liquid. The cooled liquid factis was mixed with the zinc oxide (zinc white) to form a homogeneous paste. The fine sand was then added. A so-called earth-moist mass was obtained, the color and appearance of which resembles that of wet sand, which mass can be packed in bags. Components A and B thus prepared were mixed by hand using a machine to a mass ratio of 1: 1 in small quantities, and in larger quantities. The complete mixing can be achieved in 5-10 minutes. The processing time of the liquid and self-dispersing pouring mass thus prepared is 2-2.5 hours, depending on the temperature, during which the mass does not thicken, flow well and spread. Subsequently, especially with a

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temperature above 20 C, suddenly the ligation process and ligate the mass in the joint or in the "pot" in 10-15 minutes.

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Example II

An elastic composition suitable for cold adhesion was prepared by mixing the components A and B described in Example I in a mixing ratio of 2: 1. The mass applicable for adhesion has a lower viscosity and shorter binding time than the mass according to Example I.

Example III

The fast-binding species of the joint casting and adhesive compositions described in Examples I and II were prepared by adding 0.05-0.5 wt% concentrated acetic acid to component A. This addition of acetic acid can also take place at the application site, at ambient temperature. With this solution, the binding time can be adjusted and changed independently of the temperature between wide limits.

Example IV

A hard-bonding, non-elastic bonding compound was prepared from the following components:

Component A:

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20 40 wt% bitumen B30 (softening point 60 C, penetration 20-45) 20 wt% liquid C-C plant fatty acid 17 18 40 wt% quartz sand with a grain size of 1-3 mm 25 Component B: 10 wt% of drying plant oil varnish and sulfur prepared liquid factis with a sulfur content of 10 wt.% 10 wt.% lime hydrate powder (dry quenched lime) 80 wt.% quartz flour with a grain size of 0-1 mm.

The two components were used in a 1: 1 mixing ratio. A fast-binding mass was obtained. Instead of 35 bitumen, partial or total coal tar pitch (goldron) or blown gasoline pyrolysis tar pitch with a similar softening point can be used.

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Example V

An oxide mass, dyeable with oxide colors, was prepared from the following components:

Component A: 5 60 wt.% Liquid, distilled fatty acid-goldron (iodine color number 100) 40 wt.% Reduced, sorted gravel with a grain size of 1-3 mm

Component B: 10 10 wt.% Liquid factis prepared from rapeseed oil and sulfur with a sulfur content of 10 wt.% 10 wt.% MgO (calcined magnesium) 80 wt.% Dolomite flour or limestone flour with a grain size of 0-1 mm.

The two components were used in a 1: 1 mixing ratio. Before coloring, 5-10% iron oxide red or an oxide green color was added to the leveling compound until the desired color was reached.

Example VI

For joint filling or adhesion of vertical surfaces, component B according to example I was mixed in a mixing ratio of 1: 1 or 1: 2 with component A with the following composition: Component A: 38.0 wt.% Bitumen B-90 2 .0 wt.% 60/40 polybutadiene-polystyrene mixed polymer 19.5 wt.% Tall oil fatty acid 30 40.5 wt.% Microsilica powder (with a SiO content 2 of 92%), waste powder produced in the ferrosilicon preparation containing up to 50% has a grain size of less than 6 µm). In the preparation of component A, the modified 35 bitumen was mixed hot with the microsilica powder, and after the homogenization, the tall oil fatty acid was added. Proceed as in example I.

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Example VII

From the components described below, an agent for adhesion and pouring mass was prepared: Component A: 5 60 wt.% Bitumen B-90 35 wt.% Oleic acid (C-C) 17 18 5 wt.% Hard factis prepared from pretreated rapeseed oil with a sulfur content of 19% 10 Component B: 1 wt% Ca (OH) 2 9 wt% zinc oxide 10 wt% rubber flour (regrind from rubber tires with a maximum grain size of 1 mm) 15 80 wt% quartz sand (grain size max 1 mm).

The bitumen was mixed with the hard factis at 160-170 ° C, cooled and mixed with oleic acid. Component B was prepared by mixing zinc oxide, rubber flour and quartz sand. Example VIII

An agent which can be used as a pouring mass was prepared from the following components:

Component A: 60 wt% bitumen B-90 30 wt% oleic acid (C-C) 17 18 25 10 wt% medium hard factis prepared from rapeseed oil with a sulfur content of 19%

Component B: 10 wt.% Chlorine lime (with an active chlorine content of 25-30 wt.%), 10 wt.% Rubber flour (according to example VII), 80 wt.% Quartz sand.

The mixture was prepared according to the procedure described in Example VII.

Example IX

An adhesive and pouring composition was prepared from the following components:

Component A according to Example VIII and Component B: (8% 0 95 t - 11 - 5% by weight zinc oxide 5% by weight magnesium oxide 20% by weight rubber meal 70% by weight quartz sand.

The composition was prepared according to example VII.

8800950

Claims (6)

Water- and solvent-free, two-component cold-binding agent, characterized in that Component A: 5 40-60 wt.% Bitumen or bitumen modified with 2-6 wt.% Polybutadiene-polystyrene, 20-40 wt. .% liquid fatty acid, 20-40 wt.% filler, and Component B: 10-20 wt.% liquid factis prepared from drying or semi-drying vegetable oil and sulfur containing 5-10 wt.% sulfur, 10-20 wt. .% zinc or magnesium oxide, alkaline earth metal oxide or hydroxide, or mixture thereof 60-80 wt.% filler, preferably quartz flour or sand with a grain size of 0-3 mm and the mixing ratio of components A and B 1- 3: 3-1. Agent according to claim 1, characterized in that it contains fatty acid goldron instead of bitumen and fatty acid. 3. Agent according to claim 1, characterized in that it contains oleic acid or oleic tall oil fatty acid or mixed liquid vegetable fatty acid as the liquid fatty acid. Agent according to claim 1, characterized in that the drying or semi-drying oil is sunflower, rapeseed, hemp seed, olive, fish, linseed or soybean oil or such an oil-containing varnish. Agent according to claim 1, characterized in that it contains, as alkaline earth metal oxide, lime hydrate powder or quicklime. 6. Water and solvent-free, two-component cold-binding agent 35, characterized in that, 8 8 0 ü S b 0 - 13 - ft Component A: 40-60 wt% bitumen 20-40 wt% liquid fatty acid with an average of 17-18 carbon atoms or naphthenic acid 5-10% by weight of sulfur factis prepared from pretreated rapeseed oil and sulfur with a total sulfur content of 17-19% by weight, and Component B: 10 10-20% by weight zinc oxide, magnesium oxide, calcium oxide (quicklime) or hydroxide, or chlorine lime or mixture thereof contains 10-90 wt.% filler 1-20 wt.% rubber flour and the mixing ratio of components A and B is 1-3: 3-1. 8800950