CS199771B1 - Paint,spatulating and sealing material based on asphalt and rubber with block structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravel and cementitious coating composition made of asphalt and rubber with a block structure serving as a waterproofing material for building purposes.

The produced asphalt coatings and gravel for waterproofing purposes show low flexibility and ductility at low temperatures, tendency to run at elevated temperatures, low adhesion to building materials and low durability. These properties are often the cause of damage to the waterproofing of the waterproofing coating, especially at the points of attachment to different dilatating substrates. Substantially improved utility properties of paints and gravel can be achieved by modifying rubber with block structure. For example, asphalt rubber materials can be modified with resins up to 20% by weight to improve the adhesive properties. However, coumarone-indene resins, non-aromatic resins, polyterpene type or rosin derivatives and the like are most commonly used for the modification. The resin modification component significantly increases the cost of the mass and reduces its frost resistance.

These drawbacks are eliminated by an asphalt-based rubber and blocking compound with a block structure, characterized in that it consists of 15 to 60 percent by weight of asphalt, 3 to 50 percent by weight of linear or radial teleblock polymers199 771

199 771 them with central butadiene or isoprene block β polystyrene or

methylstyrene end blocks, 0.5 to 20% by weight of a mineral oil characterized by a viscosity-density constant of from 0.65 to 1.0, 20 to 80% by weight of an organic solvent and 3 to 60% by weight of inorganic or organic fillers.

The mineral oil, characterized by a higher degree of viscosity-density constant ee, combines with the plastomer component of the rubber, which acts as an intermolecular bridge and reinforcing agent, increases the tackiness of the asphalt-rubber materials and reduces cohesion. Mineral oils characterized by a lower degree of viscosity-density constant combine with the elastomeric component of the rubber, causing a small decrease in the cohesion of the asphalt rubber materials and do not reduce their elastic character.

By adding organic or inorganic fillers such as calcium carbonate, silicates, carbon black, fibrous fillers and the like, dense cementitious gravel compositions with a high solids content can be prepared. By adding aluminum dust, it is possible to create antireflective treatment of paints and sealants. By combining all the components depending on the required properties and the purpose of use, materials suitable for sealing waterproofing asphalt coatings damaged by cracks due to aging or dilatation of the foundation gates can be obtained, materials for sealing roof details and joints of perimeter panels. for self-adhesive materials etc.

The materials are characterized by very good adhesion to asphalted strips, concrete, sheet, Bkl and are usable in the temperature range from -40 ° C to 80 ° C. Appropriate types of antioxidants and stabilizers can be used to improve the weathering resistance of paints. The values of tensile strength of the materials after aging and evaporation of solvents range from 2 to 5 MPa, ductility from 400 to 1200%. At -15 ° C the ductility still exhibits 600% ductility.

For example, the repair of damaged asphaltic strips is carried out with asphalt-based paints of the Alumatol type with asphalt suspensions and sealants. The disadvantage of these compositions is in most cases the low durability of the coatings (the necessity to apply the coatings in short cycles of 2 to 3 years), and in particular the low ductility and elasticity. Advantageously, the coating composition of Example 1 can be used for said applications. The life of the coating composition can be increased to 10 years by using antioxidants and aluminum dust. The material has a tensile strength of 1.5 MPa, an elongation of 800%, and is characterized by elasticity up to -20 ° C.

The joints of the perimeter panels are mostly sealed with plastic or elastic rubber-based sealants. Repairs of damaged joints are carried out, for example, by cutting out the damaged mastic and re-sealing, directly gluing the damaged places with rubber or unvulcanised rubber compounds. The disadvantage of these processes is high laboriousness. Advantageously, the gravel mass according to the example can be used for this purpose

199 77 recipes 2. The service life of the material for this application can be estimated at 10 to 15 years, the material shows tensile strength 3.5 MPa, ductility 500 excellent adhesion to peripheral joints of the panels, up to 70 ° C does not run down from vertical surfaces.

Exemplary mixtures of coating gravel and sealants

Recipe example 1 weight percent asphalt 30 bleached rubber with central isoprene block 8 mineral oil characterized by viscosity-density constant 0,9 2 toluene 10 gasoline 50

It is a formulation of a recipe suitable for the production of paints and self-adhesive materials.

Recipe example 2 weight percent asphalt 20 block structure rubber with central butadiene block 20 mineral oil characterized by a viscosity-density constant of 10 xylene 25 calcium carbonate 25

It is a formulation of a recipe suitable for the production of gravel and putty materials.

Claims (1)

Block structure asphalt and rubber based on bitumen and rubber, characterized in that it consists of 15 to 60% by weight of asphalt, 3 to 50% by weight of linear or radial polymers with central butadiene or isoprene block with polystyrene or methylstyrene end blocks 0.5 to 20 weight percent of a mineral oil characterized by a viscosity-density constant of from 0.05 to 30.0, 20 to 80 weight percent of an organic solvent, and 3 to 60 weight percent of inorganic or organic fillers.