ROHAGIT SD 15

ROHAGIT SD 15 is a thickening agent based on an aqueous dispersion of a thermoplastic methacrylic acid-acrylic ester copolymer. The dispersion is free from film forming aids, solvents and plasticizers.

Available Documents

TDS Download

Technical Informations

Application Advice/Typical Applications


ROHAGIT SD 15 is a uv stable, universal thickening agent for polymer dispersions and other aqueous systems with a pH value > 8. Preferably Rohagit SD 15 is used as thickening agent in non-pigmented systems like manufacturing coatings, nin-padding and printing compounds of the textile industry and in pigmented products like dispersion based paints, plasters and products for the construction chemistry. The salts of ROHAGIT SD 15 are anionic polyelectrolytes. The solutions are incompatible with cationic products. The viscosity of aqueous solutions depends on their solids content as well as on the type and quantity of base used for neutralization. Suitable alkalis are sodium or potassium hydroxide solution, triethanolamine or, preferably, 25 % ammonia solution. An excess of base and added electrolytes lower the viscosity. The consistency of this solution is glutinous, but not thready. It has a flow limit, i. e. it only starts to flow beyond a certain shear stress. Applications: ROHAGIT SD 15 can be used as thickening agent for aqueous media either as supplied (direct thickening) or as a 1 - 8 % aqueous alkaline solution (stock solution). 1. Direct thickening: Compounds of low viscosity, e.g. used in textile applications, following procedure is approved: The composition to be thickened is adjusted with alkali to a pH value of 8.5 - 10. After this ROHAGIT SD 15 diluted with up to the threefold quantity of water is added while stirring. Depending on the solids content or the desired viscosity, 1 - 5 % ROHAGIT SD 15 are required. The pH value of a thickened compound must exceed 8. Otherwise gel-like particles could be created, which can not be homogenized. Pigmented products of higher viscosity should be thickened as follows: ROHAGIT SD 15 is diluted with up to the threefold water quantity and added to the compound to be thickened while stirring. Depending on solids content, 1 to 5 % ROHAGIT SD 15 will be required. Subsequently, pH value is adjusted to 8.5 - 10. 2. Thickening with stock solution: ROHAGIT SD 15 is diluted with water, and pH value is adjusted with alkali to 8.5 to 10. Depending on the type of alkali used, stock solutions with up to 8 % solids can be prepared. Synthetic resin emulsions and compounds should have a pH value above 8.5 before the stock solution is added. For thickening of emulsion paints, for example, about 0.4 to 0.7 % ROHAGIT SD 15 solids (on emulsion) are required. For a longer storage time a biocide should be added to a stock solution.

Shipping and Storage

Store at an even temperature of between +5°C and +40°C avoiding frost and direct sunlight. Stir product before use. If stored according to these conditions and in the original unopened containers, the dispersion will be stable for 12 months following delivery. Product should be used as soon as possible after opening. During processing, storage and transport, avoid any contact with metals (including non-ferrous metals) which are not protected against corrosion. Detailed information is available on request.

Product Security/Health and Safety

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal

Effluents and Pollution Control

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal

For further information regarding this product please refer to:

Zieglerova, Jeaneta
Phone: +420 737 206 966
FAX:
eMail: Jeaneta.Zieglerova@synthomer.com


Properties

Character Value Unit
Solids Content 30.0
pH Value 3.3  
Viscosity < 100 mPa s 
Glass Transition Temperature 71 °C 
Density 1.05 g/cm³ 
Mean Particle Size 0.1 µm 
Ionic Charater anionisch  
Acid Number 55-65 mg KOH/g 


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