Mowilith LDM 7900 Data Sheet

 

 

Division Textile, Leather & Paper Chemicals  

®Mowi Mowili lith th LDM 7 79 900

Technical Data Data Sheet

Version - Issue 09/2002

 

Characteristics

Stabilization

Mowilith LDM 7900 is a plasticizer-free aqueous dispersion based on acrylic acid esters and modified with styrene.

Surfactants

Recommended Re commended Appl ication A reas reas Elastomeric wall coatings Elastomeric roof coatings

Specification These technical data are determined for each lot before its release by our Quality Control Laboratory.

   

 

 

Solids content (DIN 53 189 / ISO 1625) Viscosity (ISO 2555; 23 °C) Brookfield viscometer RVT; spindle no. 2; 20 min-1 pH value (ISO 976)

Un i t

Val u e

%

55 ±

1

mPa·s

500 ±

300

8.5 ±

0.5

 

 

 Addi  Ad di tion ti on al Data These data are used solely to describe the product. They are not subject to constant monitoring or part of the specification.

 

Dispersion Particle size

Un i t

Val u e

µm

approx. 0.25

°C

approx. 0

  Minimum film forming temperature (MFFT) (DIN 53 787 / ISO 2115)  

Film *  Ap pear anc e  Appear Glass transition temperature Tg (DIN 53 765) (DSC, heating rate 10 K/min)

 

clear and elastic °C

approx. – 15

 

* dried under standard atmospheric conditions at 23 °C and 50 % relative humidity (DIN EN 23 270)

 Ap pl ic ati on s Mowilith LDM 7900 is especially designed as a binder for flexible and crack-bridging wall coating systems. Mowilith LDM 7900 allows the formulation of impermeable coatings. Mowilith LDM 7900 is also suitable for the formulation of roof coatings with elastomeric properties. The polymer film of Mowilith LDM 7900 exhibit low water uptake and high resistance r esistance to saponification. Mowilith LDM 7900 shows a high elongation at break at temperatures temperatures down to -10ºC. Mowilith LDM 7900 has both an internal and UV curing crosslinking system. Therefore tack and dirty pick-up are very low after exposure to sunlight.

Processing The usual titanium dioxide rutile type and coloured pigments as well as fillers may be used for the formulation of paints. To ensure adequate storage stability long term storage trials are recommended at any rate, especially when fillers and coloured pigments with a large specific surface area are chosen. In addition to the widespread used polyphosphates the salts of low molecular weight polyacrylic acids (e. g. ®Mowiplus XW 330, Emucryl® D) working as a dispersing agent should also be used to achieve further stability. Depending on the pigments and extenders the required quantity is in the range of 0.1 and 0.4 % active substance relative to the pigment/extender mixture. Many thickeners are usable to adjust the desired viscosity of the paint and to improve its processability. Very good results are achieved by employing ®Tylose grades of the H and MH series with retarded swelling and medium to high molecular weight. Associative PU or acrylic thickeners (Mowilith® LDM 7002, Mowilith® LDM 7020 can be used as well alone or in combination.  A lot of commercially commercially available defoam defoamers ers can be included in order to prevent excessive foaming in the

 

paints. Trials must be carried out to determine the most suitable grades and the correct concentration. The ®Colanyl pigment preparations are usable for tinting paints. Organic pigments should be tested for their suitability for exterior paints, especially in the case of pastel p astel tones.

Preservation and Storage To prevent attack by micro organisms the preservatives normally used for polymer dispersions should be added despite our preliminary preservation measures. Checks should be carried out to determine their compatibility and efficacy. Mowilith LDM 7900 should not be stored for longer than 6 months before processing. As far as possible, storage should be at a uniform temperature in the region of 5 – 25 °C. The product should, in principle, be kept away from frost. The technical data ascertained by our quality control laboratory at the time of product release may vary according to the storage time and storage conditions and may deviate from the stated limits.

Industrial Safety Safety and Environmental Protection Not a hazardous substance within the meaning of the current curr ent Dangerous Substances Regulations (GefStoffV).

 A safety data sheet is available on request.

Clariant VenezuelaS.A. This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as guaranteeing specific properties of the products described or their suitability for a particular application. Any existing industrial property rights must be observed. The quality of our products is guaranteed under our General Conditions of Sale.

Division TLP – BU Emulsions  Av Ant ón Ph ill ips , Urb I nd San Vicen te I, Maracay, Venezuela Tel.: +58.243.5503337/ 550 3119 Fax: +58.243.5503003