Gellner Wonderblock

Gellner Wonderblock is a new binder technology for waterborne stain-blocking primers. This product forms a resistant barrier to water-soluble tannins and prevents topcoats from staining. The polymer backbone discovered by our research chemists is resistant to tannin and nicotine stains. It forms an impenetrable barrier that outperforms all other attempts at solving the bleeding of stains.

Chemical Family: Acrylics & Acrylates

End Uses: Primer, Top Coat, Waterborne Coating

Features: Blocking Resistance, Stain Resistance

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Carrier
Chemical Family
CASE Ingredients Functions
Technologies

Features & Benefits

CASE Ingredients Features
Product Highlights

A major cause of staining comes from water soluble chromophoric compounds like tannin. Until now water was the enemy for stopping the tannin from migrating to the surface and causing unsightly stains. The amount and the composition of tannin in wood are not uniform. The species of the tree and region that it was grown in will designate the amount of penta-metadigalloylglucoside that is contained in the wood. Penta-meta-digalloylglucoside is a derivative of gallic acid, a colorless solution that turns brown when it comes in contact with air. When ordinary or so called water borne stain blocking primers solubilize the tannin, they migrate to the surface and cause yellow or brown stains. Wonderblock forms a resistant barrier to water soluble tannins and prevents topcoats from staining and retarded drying. A compliant, 21 grams/liter VOC primer can be formulated with Wonderblock.

Applications & Uses

Properties

Physical Form
Specifications
ValueUnitsTest Method / Conditions
Flash Point Same as water
pH5.0 - 6.0
Solids Content42.0 - 44.0 %
Specific Gravity1.06
Type Water dilutable emulsion
Viscosity200 - 500 cps
Weight / Gallon8.84lbs

Regulatory & Compliance

Chemical Inventories