Underseal, e.g. for vehicles, has to protect them from mechanical damages like stoning, but also from corrosion. That means that good adhesive properties, working properties, flow properties and elasticity are requested. Therefore polyvinyl chloride is the basis for this kind of protective coatings.

The compositions of such coatings are as numerous as the demands made on them. The most important components are:

• Vinyl chloride polymeride
• Polyvinyl chloride
• Diethylhexyl phthalate
• Diisononyl phthalate
• Calcium carbonate, treated
• Calcium oxide, and others.

1. At room temperature bitumen is an extremely viscous, black mass. Only when it is heated it slowly starts flowing. To achieve a homogeneous mixture of bitumen and polymer the bitumen has to be heated to temperatures exceeding 160°C.
2. Up to now this is normally done in a batch mode (big vessel including ineffective dissolver-agitator). When the bitumen reached the necessary temperature, the polymer is added and mixed by stirring. This process needs much time. The process is going on much faster using an inline homogenizer. It accelerates the solving process and reduces the mixing time considerably.
3. The most efficient way of solving polymers in bitumen is to mix them inline. The new IKA® high-performance mixer DR 2000/..-PB makes this new process possible. Polymers can be added and solved in one step. The up to now necessary mixing vessel is no more needed.
   

Underseal, e.g. for vehicles, has to protect them from mechanical damages like stoning, but also from corrosion. That means that good adhesive properties, working properties, flow properties and elasticity are requested. Therefore polyvinyl chloride is the basis for this kind of protective coatings.

The compositions of such coatings are as numerous as the demands made on them. The most important components are:

• Vinyl chloride polymeride
• Polyvinyl chloride
• Diethylhexyl phthalate
• Diisononyl phthalate
• Calcium carbonate, treated
• Calcium oxide, and others.

1. At room temperature bitumen is an extremely viscous, black mass. Only when it is heated it slowly starts flowing. To achieve a homogeneous mixture of bitumen and polymer the bitumen has to be heated to temperatures exceeding 160°C.
2. Up to now this is normally done in a batch mode (big vessel including ineffective dissolver-agitator). When the bitumen reached the necessary temperature, the polymer is added and mixed by stirring. This process needs much time. The process is going on much faster using an inline homogenizer. It accelerates the solving process and reduces the mixing time considerably.
3. The most efficient way of solving polymers in bitumen is to mix them inline. The new IKA® high-performance mixer DR 2000/..-PB makes this new process possible. Polymers can be added and solved in one step. The up to now necessary mixing vessel is no more needed.