High surface area polycondensation polymer particulates based on urea and formaldehyde
AssigneeCiba-Geigy Corporation
InventorAlfred Renner
Life of this patent
Estimating the term…
Abstract
A highly dispersed solid non-porous insoluble and infusible urea-formaldehyde condensation polymer in the form of a fluffy white powder, said product having a specific surface area of more than 10 square meters per gram and an average particle size smaller than 5 microns. The product preferably essentially consists of approximately spherical microparticles having substantially uniform size and shape and shows a tendency to form loosely agglomerated structures. These solids are useful as rubber reinforcing agents and as paper pigmentary fillers.
Claims5
An insoluble, infusible, finely dispersed, non-porous urea-formaldehyde condensation product in particulate form having a specific surface area of more than 10 m.sup.2 /g and an average particle size smaller than 5 microns.
An insoluble and infusible finely dispersed non-porous urea-formaldehyde condensation product in the form of a white powder having a specific surface area of 73 square meters per gram and a bulk weight of 11.5 g/100 ml.
Dependencies are inferred from the claim text.