DD294272A5 - COLD-POSSIBLE MASS ON BITUMEN BASIS - Google Patents

Abstract

The invention relates to a cold-fillable mass based on bitumen. The aim and object of the invention is to produce a cold-mixable bitumen based mass using cellulose fiber fillers, a polybutadiene-Fluentigkautschuk, optionally inorganic fillers and solvents used in building protection, especially for the lining of drinking and service water pipelines, for Fuszbodenbeschichtungen in Can be used for repairs in the roof area as well as for surface treatment of pipes and fittings. {Bitumen; Paints and varnishes; Rubber; macromolecular compounds}

Description

Field of application of the invention

The invention relates to a cold-mixable bitumen-based composition for building protection, in particular for the lining of drinking and service water pipelines, for floor coating in cowsheds, for repairs in the roof area and for surface treatment of metallic pipe and fittings.

Characteristic of bekannton state of the art

Cold-mixable, bituminous masses are widely used in various areas of construction. They can be distinguished in bulk on an emulsion basis and in a solvent-based mass. Emulsion-based compositions are preferably used where sufficient adhesion to the substrate is required only during the drying process of the emulsion, ie mainly for work in the roof area and in floor coatings of sanitary rooms and stalls. Compositions and methods of preparation of these putties are described e.g. in the patents DD-PS 123200 and DD-PS 158554 described. In addition to the raw materials bitumen, water, emulsifiers and possibly rubber latex as fillers mineral flours such as slate, limestone and kaolin or organic fibers, such. B. animal hair used.

Solvent-based, cold-mixable compositions are preferably used in the lining of pipelines, for the filling of cracks, joints, throats and wall connections, as well as for the sealing of pipe joints. Compositions and methods of preparation of these fillers are also described in the technical and patent literature:

A cold fillable composition, in particular for roof coverings, is described in DE-OS 3424293. In a multi-stage mixing process, the mass of waste pitch, plasticizers, copolymers and ketonic, aromatic solvents is prepared. In DD-PS 213232 a method for the production of surface gaskets on substrates made of cement concrete and steel is described, wherein the fillable composition is a mixture of cut bitumen, crosslinked methylpolysiloxane and fillers, such as. Quartz, quartz, latex or slate flour.

It is generally known that the leveling off of bitumen or bitumen / polymer / solvent mixtures is largely determined by their quantitative ratio to one another. For the formation of thixotropic properties, as desired for fillers, swellable clays or fibrous fillers are mixed into the bitumen or bitumen polymer solutions. (See H. Walther: "Bituminous materials in the construction industry", p.67; Road construction, chemistry and technology Verlagsgesellschaft mb H., Heidelberg, 1962) As a fibrous filler in the past asbestos flour was often used.The advantage was that Asbestfasrige fillers in addition have contributed to a significant improvement in puttability over a wide temperature range to improve the thermal and cold properties of solventless films of putties.

Since becoming aware of the health risk associated with handling asbestos-containing material, these fillers have been substituted by mineral fibers or in combination with slate meal, fly ash, quartz powder or kaolin. The consequence was that the quality level specified with asbestos fibers could not be maintained with regard to the puttability, the settling behavior of the fillers and the heat and cold properties of the dried coating.

Object of the invention

The object of the invention is to produce a cold-mixable bit-based composition which, without asbestos fibers using cellulose fiber filler, has good processability in a wide temperature range; is homogeneous even after prolonged storage and whose solvent-free, dried films ejne good heat resistance at high temperatures and has good flexibility at low temperatures.

Explanation of the essence of the invention

The invention is based on the object, by mixing bitumen, polybutadiene liquid rubber, cellulose fiber filler, optionally inorganic Füllstoffzusätzon and solvent, a spatulable mass that can be used in many areas of building protection to produce

 According to the invention the object is achieved by a mixture having the following composition:

a) 50 to 60Gew .-% distillation bitumen having a softening point RuK of 40 ⁰ C to 70 ⁰ C.

b) 2 to 8 wt .-% cellulose fiber filler with a a-cellulose content of> 90% and a fiber length of 600μιτ \ to 10ΟΟμιη

c) 0 to 10 wt .-% ground, semi-active, inorganic filler, preferably slate flour

d) 0.5 to 5% by weight of polybutadiene liquid rubber having a molecular weight of 2000-10000

e) 20 to 45 wt .-% of organic solvents on benzinischer base, preferably petroleum spirit with a boiling range of 135 ^o Cbis200 ° C.

embodiment

The invention will be explained in more detail with reference to exemplary embodiments:

example 1

A bitumen-polymer solution is prepared from 65 parts by weight of distillate bitumen at a softening point RuK of "58 ⁰ C, 30 parts by weight of boiling-point petrol with a boiling range of 135 ° C to 200 ° C and 2 parts by weight of polybutadiene-liquid rubber." By blending 5 parts by weight of cellulose fiber Filler with a mean fiber length of 840 pm to homogenous distribution, the completion of the cold-fillable mass.

For comparison, fillable compositions were made from the same bitumen and solvent but other fillers and without liquid rubber.

Example 2

65 parts by weight of bitumen

5 parts by weight of hydrate cellulose fibers having an average fiber length of 400 μm 35 parts by weight of petroleum ether

Example 3

50 parts by weight of bitumen 22.5 parts by weight slate meal 8 parts by weight mineral wool 20 parts by weight boiling-grade petrol The properties of the various test products can be compared with the following table:

property feature 1 Example 2 3 SpachtelbarkeitX softening point RuK ⁰ C (dried film) to-15 ⁰ C 13O ⁰ C O ⁰ C 67 ⁰ C 0 ° C 85 ⁰ C Breaking point after Fraaß (dried film) -30 ° C +2 -5 ⁰ C Lowering einer4mm thick layer of filler at 45 ⁰ C in the normal after 2 hours without up to 2 mm up to 5 mm

Claims (3)

1. Cold-mixable bitumen-based mass for building protection, in particular for the lining of drinking and service water pipelines, for floor coating in cowsheds, for repairs in the roof area and for surface treatments of pipe and fittings, characterized in that the mixture of a) 50 to 70 wt .-% distillation bitumen having a softening point RuK of 40 ⁰ C to 7O ⁰ C. b) 2 to 8% by weight of cellulose fiber filler having an a-celluiose content of 5: 90% and a fiber length of 600 μm to 100 μm c) Ό to 10 wt .-% ground, semi-active, inorganic filler d) 0.5 to 5% by weight of polybutadiene having a molecular weight of 2,000 to 10,000 e) 20 to 45% by weight of solvent
consists. 2. Cold-mixable bitumen-based composition according to claim 1, characterized in that slate flour is used as the ground, inorganic filler. 3. cold-mixable bitumen-based composition according to claim 1 and 2, characterized in that is used as a solvent boiling petroleum with a boiling range of 135 ⁰ C to 200 ⁰ C.