DE1769907A1 - Process for the production of roof coverings on the basis of aqueous polymer dispersions - Google Patents

Description

The present invention "relates to a method of manufacture of roof coverings based on aqueous poly dispersions. The non-aqueous part of the polymer dispersions consists of terpolymers or multipolymers, by copolymerization of ethylene with at least one further cC-01efin and with at least a polyunsaturated polyene can be obtained by means of organometallic complex catalysts. Examples of oc-olefins are propylene and 1-butene and pentene-1, preferably propylene.

The polyunsaturated polyene preferably consists of a di- or polyunsaturated endocyc-

-2-

209809/1588

or ώ οΙ vfivol-1 anhfinl
IrschifΓΗιrigverDverbindungen, such as from dicyclopentadiene or norbornadiene, and optionally from the corresponding alkylidene or alkenyl compounds such as ethylidene norbornene or isopropenyl norbornene. Other polyunsaturated hydrocarbons can also be used; so from the series of aliphatic hydrocarbons is 1,4-hexadiene; 2,3-dimethylbutadiene, dimethyloxtadiene; 1,4-, 9-decatriene should be mentioned. Among the alioyclic hydrocarbons, 1,2-divinylcyclobutane, vinylcyclopentene, vinylcyclohexene, trivinylcyclohexane, cycloheptatriene, cyclooxtadiene and tetrahydroindene are suitable. A special feature is allylphenylacetylene as a hydrocarbon with a triple bond.

In contrast to this, conventional roof coverings consist of paper fiber fleeces impregnated with tar or asphalt, which After impregnation, provided with a thicker top layer of the same material and with fine-grained fabrics E.g. sand can be sprinkled to increase the resistance to abrasive effects or to exposure to sunlight to reduce the runoff of the top layer. Their low resistance to continuous use in the open atmosphere is known; the repairs or renewals required at relatively short intervals are costly Procedures. The embrittlement of the coverings at low temperatures is also a disadvantage. Developing better roof coverings work has therefore been ongoing and products have become known that differ from these conventional ones there is no longer any significant difference between e.g. paper fiber fleece contain and hardly become brittle any more. These ; Products are brought to the market in film or tape form and are made of e.g. natural rubber, polyisobutylene, butyl rubber or polychloroprene or made up of mixtures of these ingredients. They point towards the tone of the sign at the beginning Products have unmistakable advantages, albeit

-3- 209809/1588

-Hut, -

their price is also much higher and their processing, i.e. laying on the roof is difficult. It requires several cumbersome operations and thus causes additional costs.

Processes for the production of roof coverings from pourable or paintable solutions have also become known. With them are the laying difficulties although largely reduced in size, the small proportion of these solutions in the substance that becomes effective however, requires repeated application of the solutions, making the process costly. Further the high fire risk of the solvents used limits the process.

In recent times, roof coverings and procedures are still closed the production of which has become known, which can be poured or spread and which are based on aqueous latex dispersions, with these the mentioned laying difficulties arise and the fire hazard in the background. The dispersions contain polychloroprene as a polymer. These polymers are however, they are expensive and are therefore only used reluctantly.

Surprisingly, it has now been found that the aqueous dispersions described at the outset of the ethylene-propylene-dicyolopentadiene polymers Roof coverings at a lower price with special and modifiable properties E.g. with high resistance to atmospheric substances, especially with high water resistance and easier to process.

The method according to the invention is described in detail below.

209809/1583

In the patent application P 14 95 540.9 the production of ethylene-propylene-dicyclopentadiene polymers with targeted Properties described and in the patent application P 15 44 764.0 a process for the production of aqueous Latex dispersions made from these polymers. There is also one of the many possibilities for variation among other things the properties of the films made from the latices and, for example, the values in a table has shown that the strength and elongation of the films made from the latices are variable and closely related to the amount of dicyclopentadiene polymerized into the copolymer. Latices as shown in the application P 15 44 764.0 are described, are based on the present invention.

The process according to the invention now consists in adding suitable ingredients such as vulcanizing agents, fillers, fibers, wetting to the aqueous dispersions of the ethylene-propylene-dicyclopentadiene polymers. rJt ^: - ■ I and thickener etc. are incorporated and the homogenized mixtures are applied to the roof to be covered with the covering by pouring, painting or spraying processes. As the Al progresses, the aqueous phase emerges from the mixture, a coherent layer forms on the roof, which is firmly bonded to the substrate after it has completely dried out and covers it in a watertight manner. The new covering is resistant to the effects of light, oxygen and ozone, to any industrial exhaust gases that may have an impact, and to abrasive external influences and can be walked on. The elasticity and strength that characterize him and his characteristics remain almost unchanged in further temperature limits and thus enable adaptation to the expansion or shrinkage processes of the roof caused by temperature fluctuations without cracking or other destruction in the pavement

-5-209809 / 1 ^ 88. BATH ORIGINAL

appear.

It is an essential feature of the method according to the invention, that the polymers on which the dispersions are based, in terms of their molecular weights and the amount of polymerized-in polymers Ter components and their associated chemical and physical properties can be modified are; This fact also means that the properties of the roof covering made from it can be varied largely justified. So it is possible to make roof coverings from just a single layer with your own Properties to produce, as well as layer coverings, in which the individual layers have different properties and have various tasks to perform. By the choice of the mixing ingredients to be used there is another possibility for increasing the range of variation in 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 invention used with preference Processes are those whose non-aqueous polymer fractions are formed by copolymers of ethylene-propylene-dicyclopentadiene will. These dispersions form even without any additive after the water has emerged

au szeionneni

Coverings that can be recognized by their particularly high strengths and the relationship between strengths and the percentage of unsaturated ter component. This can be seen from the corresponding values in the table below :

-6-

209809/1588

- sheet 6 -

DCP content
of the polymer
Weight # Base solid
speed kp / cm ^ Lining break elongation Example 1a 7.75 24 160 Example 1b 18.00 206 130 Example 1c 21.00 235 120 Example 1d 29.00 245 15th

In comparison, the film properties of a natural rubber latex also cited without any addition;

Breaking strength = 24 kgf / cm
Elongation at break = 900 Ί »

In practice, coverings made from polymer dispersions are now found without any additive (as mentioned in Examples 1a, 1b, 1c and 1d) is only used in selected cases. In order to adapt the Properties of the most comprehensive practice possible, the dispersions within the meaning of the invention can thus by means of suitable additives be modified so that they meet practically every requirement as roof coverings. To modify the properties other polymeric substances, flame-retardant substances such as antimony trioxide or highly chlorinated Compounds also fillers or extenders, vulcanizing agents, fibrous materials, wetting agents, anti-aging agents, Swelling agents, waxes, plasticizers, etc. added and with these in front of the formation of the actual roof covering prepared into homogeneous mixtures by suitable facilities.

The production of two mixtures and the processing to make roof coverings is described in Examples 2 and 3 .

-7-

20980 9/1588

Example 2

a) Production of filler dispersions

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

Zinc oxide dispersion 60% kaolin dispersion 65%

Talc dispersion 65 # ig

and finally accelerator-sulfur anti-aging agent dispersion 50 # ig

This is done as follows: zinc oxide, kaolin or talc or mixtures of accelerators - sulfur anti-aging agents 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 is very quick, depending on the facility used finished, but can also take hours. After the meal or homogenization process, the dispersions are ready for use.

b) Formulation of a Daoh covering dispersion

4000 parts by weight EPT latex dispers. 50 # ¹ ^ 1000 parts by weight of butyl latex dispers. 50 #ig '

375 parts by weight amm. Casein solution 63 parts by weight Emulphor-O solution 20 418 parts by weight of zinc oxide solution 60

385 parts by weight of kaolin dispersion. 65 1875 parts by weight of talc dispers. 65 100 parts by weight KSM dispersion 50

-8th-

250 parts by weight Tylose-Swell 2 i? '

209809/1588

- sheet 8 -

1) EP terpolymers with a dioyclopentadiene content from about 29 wt .- #

2) Polysar Butyl 600, 3 # unsaturated butyl rubber (by Otto Krahn, Hamburg).

3) fatty alcohol derivative (from BASF)

4) Mixture of alkylated phenols (from Bayer), anti-aging agents.

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 is stirred in suitable agitators until a uniform, homogeneous, more or less pasty mass is formed. After completing this process · the mass can be applied to the Daoh immediately.

d) Processing of the mass into the roof covering

The homogeneous mass described under c) is applied to the roof with a wide spatula, a spray gun or in another way, for example by pouring in the desired layer thickness, and left to dry there. The drying process takes place in a shorter or longer time, depending on the layer thickness, the nature of the substrate or the prevailing outside temperature, usually within a few hours. If necessary, a further layer can be applied after this first layer has dried on. After 24 to 48 hours, the entire roof covering has dried out so far that it can be walked on. Within eight to fourteen days, even at normal outside temperatures, a crosslinking process takes place in the pavement , which in many respects is favorable to the pavement quality

-9- 209809/1588

- sheet 3 -

influences, e.g. the strength and e.g. the resistance to swelling aqueous or organic Solvent increased.

Below are some data are given, the values for a freshly laid roofing and those of a 80 ⁰ O in hot air seven days show long aged coating this composition.

Breaking strength
kp / cm Elongation at break
* freshly laid 46
65 43
150 7 days at 80 ^° C
treated in air

Example 3

a) Preparation of the filler dispersion as in example

b) Formulation of the coating dispersion

5000 parts by weight EPT latex dispers. 50 375 parts by weight amm. Casein solution 10 125 parts by weight Emulphor-O solution 20 418 parts by weight zinc oxide dispersion 385 parts by weight kaolin dispersion 65 100 parts by weight KSM dispersion 50 250 parts by weight Tylose-Swell 2 1875 parts by weight of glass fibers (fiber length approx. 2-3 mm) *) EP terpolymers with a dioyolopentadiene content

y of about 29 wt.

-10-

209809/1588

ο) Production of the roof covering dispersions as in the example However, the glass fibers are stirred into the dispersion dry.

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 preparation 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 indicated in the recipe of Example 3, is applied first to the roof and left to dry there. Then this topping coated with a second layer, as it corresponds to example 2 in its recipe. The one from these layers The built-up covering is characterized by particularly high adhesion to the base, is particularly break-proof, and holds relatively high pressure and is extremely waterproof.

Example 5

The procedure is similar to that of Example 2; in the formulation of a polymer dispersion is used, the polymer instead of 29 i »Dioyolopentadien contains only 56 of the 18 gleiohen tercomponent.

-11-

209809/1588

- sheet 11 -

Example 6

The procedure is similar to that of Example 2; A polymer dispersion is used in the recipe, the polymer of which is only 7.5 r .- # contains dicyclopentadiene as a tertiary component.

Example 7

The procedure is similar to that of Example 3; in place a polymer dispersion, the polymer content of which is made up of ethylene-propylene-dicyclopentadiene exists, a polymer occurs whose unsaturated ter component is formed by 1,4-hexadiene.

In the following, the behavior of the roof coverings described in Examples 1 to 3 under continuous stress is shown in the free Atmosphere explained:

The roof coverings described in Examples 1 to 7 were several on concrete substrates to which they were firmly adhered Months (previously up to 6 months) exposed to cold or warm weather, rain or shine, without the coverings (apart from slight changes in color) showing any noticeable changes. There could be no cracks or other phenomena that indicate oxidation or the effects of light are found. The coverings stick still firmly attached to the base.

The roof covering compositions listed in the examples are by no means restrictions on the formulation components listed tied together. Rather, products to be used with preference are disclosed there, without thereby reducing the scope of the inventive concept is narrowed.

Daoh coverings with similar properties can certainly be produced using different recipe components. So

-12- 209809/1588

- sheet 12 -

glass fibers can be replaced by e.g. asbestos fibers, kaolin dispersions by 25.B. Chalk dispersions, the emulsifier Emulphor - O can be replaced by e.g. potassium soaps and exchanged. The exchange options for polymer dispersions are mentioned at the beginning of this description; they are within the range specified there.

/ Claims

2Ü9809 / 158G

Claims (1)

-.- ^ specimen [Can not change wflfrf _to Claim Process for the production of roof coverings based on aqueous polymer dispersions using saturated and / or unsaturated olefin copolymers as their ingredients, characterized in that those olefin copolymers are used which are obtained by copolymerization of ethylene, one or more oC-01efinen and % obtained a mono- or polyunsaturated cyclic or acyclic hydrocarbon compound became. 200809/1583