DE1769907B2 - PROCESS FOR THE PRODUCTION OF ROOF COATING ON THE BASIS OF Aqueous POLYMER DISPERSIONS - Google Patents

Description

Expansion or temperature fluctuations Shrinkage processes of the roof without cracking or other signs of destruction as a result occur in the pavement.

It is an essential feature of the invention Process that the polymers on which the dispersions are based in their molecular weights and the amount of polymerized components and their associated chemical and physical properties can be modified; In this fact also lies the adaptability largely justified by the properties of the roof covering produced from it. So it is possible Manufacture roof coverings from just a single layer with their own properties, as well Layer coverings in which the individual layers have different properties and different Have tasks to fulfill. By choosing the to The mixing ingredients used is a further possibility for increasing the range of variation given the properties of the covering.

The method according to the invention is explained in more detail below with the aid of a few examples.

example 1

Aqueous polymer dispersions of the process according to the invention that are preferably used are those their non-aqueous "olymes on parts of copolymers are formed from ethylene-profylene-dicyclopentadiene. This dispersion ^ already form without Every addition after the water has escaped Coverings that are characterized by their particularly high strength and also the connection of strengths with reveal the percentage content of unsaturated tertiary components. This goes out from the appropriate Values in the table below.

punch like antimony trioxide or highly chlorinated compounds also fillers or extenders., Vulcanizing agents, fiber materials, wetting agents, anti-aging agents, swelling agents, waxes, plasticizers etc. added and with these before the formation of the actual roof covering in suitable facilities processed into homogeneous mixtures

The production of two mixtures and the processing to make roof saws is shown in Examples 2

ίο and 3 describe.

Example 2

a) Production of filler dispersions

The following aqueous dispersions are produced in ball mills, paint mills, roller mills or the like:

20th

7inc oxide dispersion 60% g

kaolin dispersion 65%

Talc dispersion 65%

and finally accelerator-sulfur anti-aging agent dispersion .. 50%

The procedure is as follows: zinc oxide, kaolin or talc or a mixture of accelerator sulfur antioxidants are mixed with the appropriate amount of water and mixed into a dough. This dough is made in the ball mill or one of the other facilities ground and homogenized. The process varies depending on the facility used Finished in a very short time, but can also take hours. After the grinding or homogenization process the dispersions are ready-to-use.

Example la
Example Ib
Example Ic
Example Id

DCP content
of the polymer
Weight percent

7.75
18.00
21.00
29.00

24 206 235 245

Lining break elongation

160

130

120

15th

40

45

In comparison, the film strengths of a natural rubber latex also become without any additive listed:

Breaking strength = 24 kp / cm ² , elongation at break = 900%.

55

In practice, coverings made of polymer dispersions without any additive (as shown in examples la, Ib, Ic and Id are mentioned) only in selected Cases application. In order to adapt the properties to the most comprehensive practice possible, can the dispersions for the purposes of the invention are modified by suitable additives so that they as Roof coverings meet practically every requirement. To modify the properties of the Coverings are the dispersions, among other things. B. other polymeric substances, flame retardant sub-

b) Formulation of a roof covering dispersion

Weight percent

4000 EPT latex dispersion 5O ⁰ Z ₀ Ig ¹ )
1000 butyl latex dispersion 50 ° _o ig ² )

375 amm. Casein solution 10% / ₀ ig
63 Emulphor-O solution 20 ° / ₀ ig ³ )

418 zinc oxide solution 60 ⁰ Z ₀ Ig

385 kaolin dispersion 65 ⁰ Z ₀ Jf
1875 talc dispersion 65 ° / _o ig

100 KSM dispersion 5O ⁰ Z ₀ Ig ¹ )

250 Tylose-Swell 2 ⁰ Z ₀ ⁶ )

·) EP terpolymers with a dicyclopentadiene content of

about 29 weight percent.
² ) Polysar Butyl 600.3 "/" Unsaturated butyl rubber (from

Otto Krahn, Hamburg).
^a ) Fatty alcohol derivative (from BASF).
^l ) Mixture of alkylated phenols (from Bayer), anti-aging

middle.
⁵ ) methyl cellulose (ex Kalle).

c) Preparation of the roof covering dispersion

The additives dispersed in water are added to the polymer dispersions and the whole thing Stirred in suitable agitators until it is uniform, homogeneous, more or less pasty Mass arises. After completing this process, the Majse can be applied to the roof immediately will.

d) Processing of the mass into the roof covering

The homogeneous mass described under c) is applied using a wide spatula, spray gun or also in other ways, e.g. B. applied by pouring in the desired layer thickness on the roof and left to dry there. The drying process takes place depending on the layer thickness and the nature of the substrate or the prevailing outside temperature in a shorter or longer period of time, usually within a few Hours. If necessary, after this first layer has dried on, another layer can be applied take place. After 24 to 48 hours, the entire roof covering has progressed to the point where that it can be committed. It runs within 8 to 14 days even at normal outside temperatures a cross-linking process in the pavement that improves the pavement quality in many respects affects such. B. the Festigke-t improved and z. B. the resistance to swelling acting aqueous or organic solvents increased.

Some data are given below, the values for a freshly laid roof covering and such one aged at 80 ° C '... in hot air for 7 days Show coverings of this composition.

Positions of the filler dispersions and the preparations of the roof covering dispersions are described in Examples 2 and 3.

In the following, the processing of the masses for the roofing described is described.

The roof covering dispersion, as specified in the recipe of Example 3, is the first to be applied to the Roof applied and left to dry there. After that, this topping is covered with a second layer like her in its formulation corresponds to example 2 coated. The covering built up from these layers is characterized by particularly high adhesion to the base, is particularly break-proof, holds relatively high pressure and is extremely waterproof.

B ei <>) ie 1 5

The procedure is similar to that of Example 2; a polymer dispersion is used in the recipe, whose polymer contains only 18% of the same tertiary component instead of 29% dicyclopentadiene.

Example 6

C in air fracture
strength
kp / cm ² fracture
strain
7o Freshly laid
7 days at 80 ^c
treated By S 46
65
ρ i el 3 43
150

a) Preparation of the filler dispersion as in
Example 2

b) Formulation of the coating dispersion

Weight percent

5000 EPT latex dispersion 50% *)

375 amm. Casein solution 10%

125 Emulphor-O solution 20%

418 zinc oxide dispersion 60%

385 kaolin dispersion 65%

100 KSM dispersion 50%

250 Tylose swelling 2%
1875 glass fibers (fiber length about 2 to 3 mm)

*) EP terpolymers with a dicyclopentadiene content of about 29 weight percent.

c) Production of the roof covering dispersions as in Example 2. However, the glass fibers become dry stirred into the dispersion.

d) Processing of the compound for roofing as in example 2.

Example 4

This example describes a covering made up of dispersions of different compositions.

The formulations of the layered roof covering correspond to Examples 2 and 3. The Her-Es the procedure is similar to that of Example 2; a polymer dispersion is used in the recipe, whose polymer contains only 7.5 percent by weight of dicyclopentadiene as a tertiary component.

The following shows the behavior of the roof coverings described in Examples 1 to 6 under continuous load explained in a free atmosphere.

The roof coverings described in Examples 1 to 6 were on concrete substrates on which they firmly adhered for several months (previously up to 6 months) in cold or warm conditions, in rain or Sunshine exposed to weathering without affecting the coverings (apart from slight changes in color tone) showed noticeable changes. Neither cracks nor other manifestations could be found Indicate oxidation or exposure to light. The coverings still adhere firmly on the pad.

With the roof covering compositions given in the examples are by no means restricted to the listed formulation components. Rather, preferred products to be used are disclosed there, without thereby affecting the scope of the The idea of the invention is narrowed.

Roof coverings with similar properties can be done using different recipe components be produced. This is how glass fibers can get through

z. B. asoest fiber, kaolin dispersions by z. B. Chalk dispersions, the emulsifying agent Emulphor - O by z. B. Potash soaps are replaced and exchanged. The exchange options for polymer dispersions are mentioned at the beginning of this description; they move within the specified there Circumference.

The following are the advanced properties of the roof coverings made in accordance with the invention further explained on the basis of comparative tests. These progress details relate on the one hand on the results of artificial weathering and on the other hand on the results of the Test for water vapor permeability.

Results of artificial weathering

Comparison of roof coverings according to the present invention and those that use polychloroprene latex as

Polymer base included

rehearse After 100 hours After 250 hours After 500 hours After 750 hours After 1000 hours Labelling Ventilation Ventilation Ventilation Ventilation Ventilation Sample 1 Corresponds to the Beginning ver Stronger Ver Surface be Look like Look like Recipe patent coloring coloring covers with nadei after after game 2. EPT shaped Kri 500 hours 750 hours. to However, latex is stall. Mottled additionally white by Polychlo Discoloration Efflorescence roprene latex on the sub page. (Back) Sample 2 Corresponds to the More discolored Discoloration still Look like White Aus Look like Recipe patent as sample 1 grown. after blossoms on after example 3.EPT- Low stiffness 250 hours the surface. 750 hours However, latex is loss of life. Strong crack by poly Many small education at the chloroprene latex Indentations surface replaced Sample 3 Example 2 of the None detectable None detectable Weak ver No more No more Sign up change change change (ver change change coloring) Sample 4 Example 3 of the None detectable No academic qualifications No party bears rvciiic icsioiciiuaie Except micro Sign up change change change change scopically small needlepoints like ver no deepenings visible ver changes Sample 5 Example 5 of the None detectable None detectable Very weak No more No more Sign up change change Discoloration change change Sample 6 Recipe like None detectable Dirty out No more No more Very easy to game 3 of An change see, but not change change step ^r n needle Sign up, visible changes artifc ^ r crystals but polymer change the at the upper of the example S Basic color of area. and flexibility

Results of the test for water vapor permeability

Comparison of roof coverings according to the present invention and those that use polychloroprene latex as

Polymer base.

Sample identification Sample 1 Water vapor permeability
g / m ^f d Corresponds in the formulation to patent example 2. EPT latex is, however replaced by polychloroprene latex Sample 2 1.3 to 1.7 Corresponds to patent example 3 in the formulation. EPT latex is, however replaced by polychloroprene latex Sample 3 3.5 to 4.5 Example 2 of the registration Sample 4 1.3 to 1.7 Example 3 of the registration Sample 5 1.2 to 1.8 Example 5 of the registration Sample 6 1.2 to 1.8 Recipe as in Example 3 of the application, but with the polymer of Example 5 1.8 to 2.2

Test method: Voruonn BIN 53122, April 1961.

309510/52

Claims (1)

described products with unmistakable advantages, although their price is also much higher Claim: their processing, d. H. laying on the roof, is difficult. It requires several cumbersome 5 operations and thus causes additional costs. Process for the production of roof coverings Also process for the production of roof coverings From aqueous, customary vulcanizing agents, fillers, from pourable or spreadable solutions, materials, fibrous materials, wetting and thickening agents are known io solutions of active substance or syringes, thereby gekennzeich- however, a repeated application of the solutions net that such olcfin copolymers used necessary and thus makes the process costly, which by copolymerization of ethylene, playful. Furthermore, the high risk of fire of the combined or more α-olefins and one or more solvents sets limits to the process,
several unsaturated cycloaliphatic carbons. Recently, roof coverings and water-based compounds have also been produced. Process for their production became known, which can be poured or brushed and are based on aqueous latex dispersions. With these the mentioned laying difficulties and the fire ao danger in the background. The dispersions contain Polychloroprene as a polymer. However, these polymers are expensive and are therefore reluctant to use Mission. Surprisingly, it has now been found that The invention relates to a process for the production of the initially disclosed aqueous dispersions of roof coverings based on aqueous polymer dispersions of ethylene-olefin-diolefin polymers. The non-aqueous portion of the polymer dispersible roof coverings lower price with special and sions consists of terpolymers or multi-even more modifiable properties such. B. with polymers, which by copolymerization of ethylene high resistance to Atmärilien, ar; at least one further Λ-olefin and, in particular, with high water resistance and at least one polyunsaturated polyene by means of easy processability, can be produced,
organometallic complex catalysts are obtained the. Propylene, for example, are examples of -olefins, and processes are described in detail.
1-butene and 1-pentene, preferably propylene in patent application P 1 495 540.9, the Herfracht. 35 position of ethylene-propylene-dicyclopentadiene-poly The polyunsaturated polyene consists of a mers with specific properties proposed and doubly or polyunsaturated cycloaliphatic in German Patent 1,289,656 a process tables 1 hydrocarbon, preferably from a for the production of aqueous latex dispersions from those with an endocyclic structure, such as. B. Di- these polymers. There, inter alia, a cyclopentadiene or norbornadiene, as well as any of the many possibilities for varying the natural case, the corresponding alkylidene or alkenyl shafts of the films made from the latices such. B. Äthylidennorbornen or led and z. B. shown by the values of a table, isopropenylnorbornene. Other cyclic carbons, too - that the strength and elongation of the films produced from the latices of hydrogen, such as cyclooctadiene or tetrahydroindene, are variable and can be considered in close consideration. In contrast to this, there are conventional amounts of dicyclopentadiene that are polymerized into the copolymer. Latices, as they are described in the coverings made of m: ⁽ . Tar or asphalt impregnated paper - German patent specification 1 289 656, fiber nonwovens, which are based on the present invention after impregnation with a,
thicker top layer of the same material provided The inventive method is now and with fine-grained substances such. B. sand sprinkled 50 in that the initially disclosed aqueous dispersion / earth to increase the resistance to abrasive ions of ethylene-.x-olefin-diolefin polymers effects or when exposed to sunlight, suitable ingredients such as vulcanizing agent, the drainage of the top layer to reduce. Their fillers, fibers, wetting agents and reduced resistance to long-term use are incorporated into thickening agents, etc. and the homo-free atmosphere is well known; The repairs or spraying processes required in relatively short mixtures by pouring, painting or time intervals on the innovations to be provided with the covering are costly procedures. Also the roof can be applied. With progressive embrittlement of the coverings at low temperatures, the aqueous phase emerges from the mixtures and forms a disadvantage. On the development of better roof coverings, a cohesive layer on the roof was therefore continuously worked on, and there are products 60 that, after complete drying, have become known to that which is connected to this conventional underlay, and which differ significantly from water-tightness z. B. does not cover non-woven paper. The new covering is against the effects of light, contains more and hardly becomes brittle. Oxygen and ozone, against possible effects. B. Natural 65 outside permanent, it is also accessible. Its own rubber, polyisobutylene, butyl rubber or poly- and its distinguishing elasticity and strength chloroprene or mixtures of these ingredients remain almost unchanged within wide temperature limits. They have changed compared to the ones at the beginning and thus enable an adaptation to through