DD221994A1 - HYDROPHOBIC GIP BONDING AGENT FOR USE IN MOISTURE - Google Patents

Abstract

The invention, a hydrophobic gypsum binder, is used in particular for the installation and removal of plasterboard for wet rooms. It is a two-component mixture with the solids content of a hydrophobic gypsum or gypsum hemihydrate and / or excited anhydrite. The liquid fraction consists of an aqueous Montanwachsemulsion and an emulsifier. By changing the consistency, the hydrophobic gypsum binder can be used according to the requirements as a joint filler, Ansetzbinder, filler, potting or leveling compound for the expansion of wet rooms.

Description

Field of application of the invention

The invention relates to a joint filler, a filler, potting or leveling compound and / or Ansetzbinder, especially for the expansion of wet rooms using two components, a calcium sulfate binder and / or excited anhydrite or hydrophobic gypsum and a dispersion.

Characteristic of the known technical solutions

Acrylic binders or fugger fillers for gypsum stains as well as small and large-sized gypsum elements use suitable masses mainly based on calcium sulphate. This also applies to leveling and leveling compounds for the production of flat surfaces. Thus, according to DD No. 53604, a double-fired gypsum - Alaungipsbinder - and in DD No. 73730 a normal gypsum with urea-formaldehyde modified and used for joining or repairing a variety of gypsum boards. ; '.. ·.'

The behavior of elements impregnated or rendered hydrophobic by silicones, paraffin wax emulsions, ceresins, ozokerites, bitumen or resin emulsions is different. Adhesive binders, grout, putty and casting compounds must be resistant to these elements, which are used in rooms with high relative humidities, and at the same time achieve a good bond. This can be achieved by expensive synthetic resins or z. B. achieve by using silica-modified gypsum binder. A permanent protection is not achieved by these silicone-containing compounds and it is therefore always recommended a subsequent surface treatment by tiles or films. The problem arises when, for economic reasons, plasterboard panels and elements with their impregnated joints are only provided with a paint system. If one wants to pipe passages e.g. in gypsum plasterboard, only synthetic resins are used as one- or Zweikomporientenmaterial in wet rooms with success. The use of these sealing compounds for joint filling is already uneconomical.

There are also known water repellents such as silicates, stearates and silicones, which are pierced or sprayed onto plaster moldings and Fugenmaierial to achieve a water-repellent effect on the surface. Urn but to achieve a consistent protection with economically acceptable calcium sulfate based feedstocks, no binders are known for the intended application.

Object of the invention

For the use in particular of hydrophobic gypsum stains according to DD No. 160516, a water-repellent sealing compound for pipe penetrations and joints, a potting or leveling compound and a Ansetzbinder for economic use in wet rooms to develop, which has the same hydrophobic properties as the gypsum stains. '.' ,

Explanation of the essence of the invention

Since the most varied modified one-component mixtures based on calcium sulfate for the intended application in rooms with high relative humidities led to no promising solution, according to DD CO4B / 238002/8 a hydrophobic burnt gypsum was developed. This can not be sprinkled by its hydrophobic properties as the usual gypsum easily in the mixing water. Therefore, a mixture of mixing water and an emulsion of the hydrophobing agent of the hydrophobic gypsum according to DD No. 160516 was used and achieved a good wettability of the hydrophobic gypsum; Surprisingly, it was found that normal spirits and / or more or less excited anhydrite depending on the water-gypsum ratio also identify with this emulsion after setting certain water-resistant properties and grouting, as a bonding agent, as a balancing composition for plaster elements in the expansion of wet rooms for Walls, ceilings and floors can be used. Hydrophobic gypsum or normal or modified calcium sulfate binder and / or excited anhydrite is stirred into a finely dispersed aqueous Morrtanwächsemulsion and adapted in accordance with the intended use in accordance with consistency. The emulsion has a content of 6-35 parts by weight of montan wax, preferably 10-25 parts by weight of montan wax, 1-7 parts by weight of emulsifier, more preferably 3-5 parts by weight of emulsifier, alkylphenol-based ethylene oxide abutments and longer chain fatty alcohol and water in addition to 100 parts by weight.

For modifying the solid component, additives such as quartz sand of certain grains, silica gel as a leaning agent, various cellulose compounds and high-swelling alginates as plasticizers, setting regulators, inert materials in the form of fibers, e.g. Glass fibers to improve the drying behavior and to increase the stability of larger joints, source-reducing agents such as u.a. Potassium sulfate can be used. Even special cements, according to the compositions, according to DD No. 153817, despite their suppleness as putty for gypsum building materials, have the disadvantage of increased water solubility due to their proportions of starch adhesives. The already very low water-gypsum ratio, especially in the mixtures m / t anhydrite / barium sulfate, with its good strengths, becomes more water-resistant by the montan wax emulsion according to the invention and can be used, for example, in the thin-bed process.

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embodiments

By way of examples, the proportions of the solid and the liquid component to obtain spatulas to pourable masses are shown, starting from a basic formulation of Montanwachsemulsion. Known additives for specifying certain properties, i.a. Plasticity, swelling and shrinkage, drying behavior and adapted solidification times depending on the use of the two-component binder are not considered. Test results on the water absorption after direct storage of the specimens (mass constancy) in water and information on the solidification times complete the examples.

example 1

5 parts by weight of gypsum hemihydrate

2 parts by weight of montan wax emulsion ·

Start of solidification: 4min, solidification end: 14min water absorption after water storage 15min: 3,7Ma .-% 60min: 4,8Ma .-% 120m'in: 5,6Ma .-%

Example 2

5 parts by weight of gypsum hemihydrate 1 part by weight of montan wax emulsion

1 part by weight of water

Start of solidification: 4,25min, solidification end: 15min water absorption after water storage

15min: 7,3Ma .-% '. '..

60min: 8,3Ma .-% 120min: 8,8 Ma .-%

Example 3

4.44 parts by weight of gypsum hemihydrate

2 parts by weight montan wax emulsion

Start of solidification: 6min, solidification end: T6,5min,.

Water absorption after water storage 15min: 4.8Ma .-% 60min: 5.4Ma .-% 120min: 6.1 Ma .-%

Example 4

4.44 parts by weight of gypsum hydride '

1 part by weight of montan wax emulsion

1 part by weight of water. "Start of solidification: 7min, solidification end: 17min water absorption after water storage 15min: 7,4Ma .-%

60 minutes: 9.5% by mass

120min: 10.3Ma .-%

Example 5

3.64 parts by weight of gypsum hemihydrate

2 parts by weight montan wax emulsion

Start of solidification: 9min, end of freezing ': 18min' ','

Water absorption after storage for 15 minutes: 6.1% by mass

60min: 8,6Ma .-% -

120min: 9,1 Ma .-% ', -

Example 6

3.64 parts by weight of gypsum hemihydrate 1 part by weight of montan wax emulsion

1 part of mass water '

Start of solidification: 10,7min, solidification end: 23,6min water absorption after water storage 15min: 9,4Ma .-% 60min: 14,1 Ma .-% 120 min: 16,4Ma .-%

Example 7 '. - / · ''^;'/'^·:;

5 parts by weight of gypsum hemihydrate 0.66 parts by weight of montan wax emulsion 1.34 parts by weight of water

Start of solidification: 4,7min ,, solidification end: 19,7min water absorption after water storage 15min: 9,6Ma .-%

60min: 13.0Ma .-% 120min: 13.9Ma .-%

Examples

3.33 parts by weight of gypsum hemihydrate 2 parts by weight montan wax emulsion solidification beginning; 12min, end of solidification: 27min VVese uptake after storage in water? I5? Min: 7,0Ma. ^% Λ; V. .:. ' .-. ·.

60min: 7, ÄMa: -% '. : ' '

12ÖWin: ^ ^; '''

Example 9 - ^v :. ^ V. - ^: '' ^: '; ^c : U-- "'.:'. '':.:::

2.85 parts by weight of gypsum hemihydrate 2. Masseteije Montanwachsemulsion Erstiarrüngsbeginn: 15min, solidification end: 31 min Vvesseraufnahme after water storage

Ö0; min: 10, iBMa .-%:

120rrtin: 11,0Ma; -%

In Examples 1 to 4, 6, 7 and 9, the emulsion contains 10% montan wax and 8% alkylene-based ethylene oxide abutment; in Example 5, 12% montan wax and 3% alkylphenol-based ethylene oxide abutment and in Example 8 25% montan wax and Contain 3,5-ethylene oxide starting materials based on alkylphenols and longer-chain fatty alcohols. : '- -. ,, ..- '.. ..'. / '. '. . ' . ' , '..

Claims (3)

Invention claims: 1. two-component binder consisting of a solid component based on calcium sulfate and an emulsion for the expansion of wet rooms as joint filler, Ansetzbinder, putty, casting or leveling compound, in particular for the installation of hydrophobic plasterboard, characterized in that hydrophobic gypsum or gypsum hemihydrate and / or stimulated anhydrite is combined with an aqueous Montanwachsemulsion which is added to a content of 6 to 35 parts by weight of montan wax, 1 to 7 parts by weight of emulsifier, ethylene oxide based on alkylphenols and long-chain fatty alcohols per 100 parts by weight with water. 2. Two-component binder according to item 1, characterized in that substances for modifying the setting, the swelling behavior, the drying behavior, the leaning and the plasticity of the solid component are added before mixing or Mischverbbzeß or contained in the liquid component or in the water. 3. Two-component binder according to item 1 and 2, characterized in that 42-48 parts by weight of gypsum and 18-40 parts by weight of anhydrite binder, 0-20 parts by weight of barium sulfate and 15-24 parts by weight of starch adhesive are used as the solid component. ^; ' ^: ,;'''' _: -. : ...- ·. '''.'·'. ... ''. ·. ". '.' ·