2. Materials
In general, with the exception of a few powdery or solid fillers, these materials come in forms ranging from free-flowing liquids to viscous pastes. They are therefore generally pumpable.
2.1 Polyols
Hydroxylated products, i.e. with a primary –OH reactive group, are characterized by their :
OH hydroxyl number (I OH ), inversely proportional to molecular weight;
functionality.
Other features are also used:
residual water content (% by mass) ;
viscosity (Pa.s) ;
density (kg.m ...
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Materials
Polyaddition reactions
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- (1) - BAYER - Production de mousses polyuréthanes (PUR) rigides - PU21012_fr.pdf (30/06/2004).
- (2) - LEPPKES (R.) - Polyurethanes [elastogran] – 2000 - Materials...
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