| http://www.w3.org/ns/prov#value | - In a preferred embodiment, the polymeric binder will not harden until expansion of the microspheres or gases is substantially complete. [0017] Examples of thermoplastic polymers which may be used as binders include polymers of ethylenically unsaturated monomers, such as polyethylene, polypropylene, polybutenes, polystyrene, poly (a-methyl styrene), polyvinyl chloride, polyvinyl acetate, polymethyl
|
