GB2144131A

GB2144131A - Asphalt-like composition suitable for roof coverings etc

Info

Publication number: GB2144131A
Application number: GB08417261A
Authority: GB
Inventors: Milan Popelka; Josef Mittenhuber
Original assignee: TEPLOTECHNA OP
Current assignee: TEPLOTECHNA OP
Priority date: 1983-07-07
Filing date: 1984-07-06
Publication date: 1985-02-27
Also published as: HUT38111A; FR2548679A1; SE8403604D0; IT8421779A1; SE8403604L; RO89860A2; GB8417261D0; DE3424293A1; IT1196183B; FR2548679B1; PL248599A2; PL138848B2; IT8421779A0

Abstract

The composition according to the invention comprises a primary component, optionally together with a secondary component. Both components contain a ketonic or aromatic solvent such as toluene, acetone, or a combination thereof; pitch residue from dimethyl terephthalate production; a softener (e.g. dibutyl phthalate, dioctyl adipate or an aliphatic light oil); and a copolymer such as vinyl chloride/vinyl acetate. The composition may also include one or more of butadiene-styrene rubber, a resin component (coumarone-indene resin), a relaxation admixture (acrylic acid butyl ester, ethylenylstyrene acrylate), a regenerating admixture (polystyrene, acrylonitrile/butadiene/styrene terpolymer), and a pigment such as iron trioxide, zinc oxide, titanium dioxide or chromic oxide. The composition may be used as a coating, adhesive or jointing material.

Description

SPECIFICATION Composition, especially for roof covering The invention relates to a composition, especially for roof coverings, which can also be used for coating roof shells, as adhesive for sticking water-proofing foils of rubber and thermoplastic materials, or, optionally, as a sealing and jointing composition.

For roof coverings are used at present most frequently compositions based on asphalt the price of which keeps rising and which is sometimes difficult to obtain apart from the fact that, due to its physical properties, it does not always meet the demands placed upon the resistance and lifetime of roof coverings which are exposed to periodically variable weather conditions. In addition, the process of preparing asphalt for this purpose is demanding on energy.

Treading coverings are mostly made of thermoplastic materials. In the processing of such materials to produce prefabricated sheets for floor coverings or foils for outdoor water-proofing, these materials tend to considerably contract within a shorter or longer time, whereby their use for many purposes, especially for covering roofs and for water proofing work in general is practically out of question.

Also in the field of sticking, particularly water-proofing coatings for example of rubber and thermoplastic foils, there exists a shortage of economically available compositions having satisfactory physicomechanical characteristics to be maintained within the entire lifetime period of the water-proofing coating product. Some problems which are to be coped with, relate to the versatility of such adhesives with respect to substrates of various character, such as concrete, asphalt cardboard, metal sheet, man-made materials based on PVC and glass.

It is an object of the present invention to eliminate the drawbacks of prior art and to provide a composition, especially for roof coverings, which comprises, according to the invention, a primary component containing 1 3 to 50% by weight of a ketonic and aromatic solvent substance, 10 to 75% by weight of pitch residue from dimethyl terephthalate production, 3 to 15% by weight of a softener, and 8 to 25% by weight of a copolymer. As the ketonic and aromatic solvent substance can be used acetone, or toluene, or a combination thereof, as the softener can be used dibutyl phthalate, dioctyl adipate, or aliphatic light oils, and as the copolymer can be used a copolymer obtained from vinyl chloride-vinyl acetate.

The primary component can contain further, preferably, 0.5 to 16% by weight of a stabilizer such as aluminium powder, or zinc oxide. Such a composition consisting of the primary component is particularly suitable for roof coverings.

The composition especially designed for sticking water-proofing sheets and foils comprises, apart from the primary component, a secondary component which contains 0.6 to 6.5 weight parts of pitch residue from dimethyl terephthalate production, 7.2 to 18 weight parts of a ketonic and aromatic solvent substance, 0.1 to 0.7 weight parts of a softener, 0.05 to 1 weight part of a copolymer, 0.03 to 0.6 weight part of butadiene-styrene rubber, and 0.03 to 0.4 weight part of a synthetic or natural resin such as coumarone-indene resin, all related to 3-10 weight parts of the primary component. As the ketonic and aromatic solvent substance can be used acetone, toluene, or a combination thereof, as the softener dibutyl phthalate, dioctyl adipate and aliphatic light oils, and as the copolymer can be used, for instance, vinyl chloridevinyl acetate.

The afore-described composition can additionally contain from 1 to 25 weight parts of a relaxation admixture such as butyl ester of acrylic acid, or ethylenylstyrene acrylate, related to 100 weight parts of the secondary component.

For treadable roof coverings it is preferred to employ a composition consisting of the primary component which additionally contains 0.3 to 5.5 weights parts of a regenerating admixture such as polystyrene, acrylonitrile/butadiene/styrene terpolymer, or a combination thereof, and 1.5 to 8 weight parts of a ketonic and aromatic solvent substance such as acetone, toluene, or a combination thereof, all related to 1 to 8 weight parts of the primary component.

To achieve a colour tone corresponding to that of the other building elements there can be added to the afore-described composition 0.05 to 0.3 weight part of a colour pigment such as iron trioxide, zinc oxide, titanium dioxide and chromic oxide, related to 1-8 weight parts of the primary component.

A composition according to the invention can fully replace in many fields asphalt products, and in some fields is even superior to them. Unlike asphalt products, a composition according to the invention may be preferred for its substantially lower prime costs since it contains waste materials which have not yet been processed. Another advantage of the composition is its resistance to contraction for a relatively very long time whereby it is particularly useful for roof coverings and water-proofing work, in general.

Another advantage of the composition lies in its photochemical stability; because of its resistance to solar radiation it can be used for outdoor water-proofing installations. Apart from this, the composition is permanently elastic so that coatings made therefrom do not tend to break or crack. The composition, if exposed to heat, is capable of being activated even after several years, which capability can even be raised by certain measures, and is characterised by a high adhesion power with respect to various substrates, including concrete, man-made materials, non-ferrous metals, brickmaking products, or synthetic rubber. The composition according to the invention can be applied by means of a doctor blade, by pouring, or by mechanical spreading. It can be, optionally, used as a jointing composition.

In order that the invention may be better understood and carried into practice, some preferred embodiments thereof will be hereinafter described in the following examples which, of course, are not intended to limit in any way the scope of the invention as defined in the following claims.

EXAMPLE I A roof coating composition was prepared by mixing 660 kg of acetone, 1 600 kg of waste pitch from the dimethyl teraphthalate production, 340 kg of dibutyl phthalate, 425 kg of a copolymer, and 50 kg of aluminium powder.

The composition exhibited the following physicochemical properties: specific weight (density) 1.1-1.2 kg per one litre brittle temperature after ageing up to 5-10'C heat stability after ageing permanent up to 80"C short-term up to 90"C compression of the film heated to 70"C 1% within 7 days frost resistance in a solution (determining the spreadability) up to - 25"C flash point after ageing at least 1 50 C EXAMPLE II To the composition described in EXAMPLE I another 20% of dibutyl phthalate was added.

The composition was designed especially for pasting on water-proofing coatings from rubber and thermoplastic foils in winter.

EXAMPLE 111 In a homogenizer was prepared an adhesive composition containing 2000 weight parts of toluene, 1 300 weight parts of pitch residue from dimethyl terephthalate production, 40 weight parts of dibutyl phthalate, 80 weight parts of a vinyl chloride/vinyl acetate copolymer, 30 weight parts of butadiene-styrene rubber and 20 weight parts of synthetic coumarone-indene resin.

The composition had the following physicochemical propertis: specific weight (density) 1.1 kg per one litre heat stability permanent up to 70"C short-term up to 90"C flash point after ageing at least 1 50 C foil peel strength in 2 days 0.6 Nx/cm in 6 weeks 30 Nx/cm EXAMPLE IV In a homogenizer was prepared and thoroughly homogenized an adhesive composition which contained 2000 weight parts of toluene, 1 300 weight parts of pitch residue from dimethyl terephthalate production, 40 weight parts of dibutyl phthalate, 80 weight parts of a vinyl chloride/vinyl acetate copolymer, 30 weight part of butadiene-styrene rubber, 20 weight parts of synthetic coumarone-indene resin and 600 weight parts of acrylic acid butyl ester.

The composition was tested in practice in pasting on water-proofing sheets, and exhibited an extraordinary elasticity. After exposure to solar radiation, no degradation and surface cracks or fissures were observed.

EXAMPLE V A treadable composition was prepared from 25 weight parts of pitch residue from dimethyl terephthalate production, 6 weight parts of dibutyl phthalate, 5 weight parts of a vinyl chloride/vinyl acetate copolymer, 75 weight parts of toluene, 9 weight parts of acetone, and 25 weight parts of polystyrene.

EXAMPLE VI Another treadable composition was prepared from 1 5 weight parts of pitch residue from dimethyl terephthalate production, 3.5 weight parts of dibutyl phthalate, 3 weight parts of a vinyl chloride/vinyl acetate copolymer, 25 weight parts of toluene, 7 weight parts of acetone, and 3.5 weight parts of acrylonitrile/butadiene/styrene terpolymer.

The treadable compositions according to EXAMPLES V and Vl were subjected to long-term tests on outdoor substrates. A photochemical stability and elasticity of the coatings were observed even after several years.

Claims

1. A composition, especially for roof coverings, comprising a primary component containing 1 3 to 50% by weight of a ketonic and aromatic solvent substance selected from the group consisting of acetone, toluene, and a combination thereof, 10 to 75% by weight of pitch residue from dimethyl terephthalate production, 3 to 15% by weight of a softener selected from the group consisting of dibutyl phthalate, dioctyl adipate and aliphatic light oils, and 8 to 25% by weight of a copolymer such as a copolymer obtained from vinyl chloride/vinyl acetate.

2. A composition according to Claim 1, wherein the primary component additionally contains 0.5 to 16% by weight of a stabilizer selected from the group consisting of aluminium powder and zinc oxide.

3. A composition according to Claim 1 or 2, including a secondary component containing 0.6 to 6.5 weight parts of pitch residue from dimethyl terephthalate production, 7.2 to 18 weight parts of a ketonic and aromatic solvent substance selected from the group consisting of acetone, toluene, ketone, and a combination thereof, 0.1 to 0.7 weight parts of a softener selected from the group consisting of dibutyl phthalate, dioctyl adipate and aliphatic light oils, 0.05 to 1 weight part of a copolymer such as vinyl chloride/vinyl acetate, 0.05 to 0.6 weight part of butadiene-styrene rubber, and 0.03 and 0.4 weight part of a synthetic or natural resin such as coumarone-indene resin, all related to 3-10 weight parts of the primary component.

4. A composition according to Claim 3, which further contains 1 to 25 weight parts of a relaxation admixture selected from the group consisting of butyl ester of acrylic acid and ethylenylstyrene acrylate, related to 100 weight parts of the secondary component.

5. A composition according to any one of Claims 1 and 2, which further contains 0.3 to 5.5 weight parts of a regenerating admixture selected from the group consisting of polystyrene, acrylonitride/butadiene/styrene terpolymer, and a combination thereof, and 1.5 to 8 weight parts of a ketonic and aromatic solvent substance selected from the group consisting of acetone, toluene, and a combination thereof, all related to 1-8 weight parts of the primary component.

6. A composition according to Claim 5, which further contains 0.05 of 0.3 weight part of colour pigment selected from the group consisting of iron trioxide, zinc oxide, titanium dioxide and chromic oxide, related to 1-8 weight parts of the primary component.

7. A composition substantially as hereinbefore described with reference to any one of EXAMPLES I to VI.