Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1974-11-04
1976-12-21
Czaja, Donald E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
252 621P, 260 4229, 260 4232, 260 4233, 260 4237, 260 4239, 260 4243, 260 4246, 260 4247, 526 20, 526 30, 526339, 526348, 528503, C08K 304, C08K 336, C08K 501
Patent
active
039987787
ABSTRACT:
Discrete, finely divided, tack-free elastomer particles are prepared from a filler-containing aqueous elastomer emulsion containing an aqueous emulsion of an elastomer dissolved in a volatile inert organic solvent having an emulsifying amount of a quaternary ammonium salt cationic surfactant and an aqueous suspension or dispersion of a solid, finely divided elastomer filler, which process comprises gradually introducing the filler-containing aqueous elastomer emulsion into an aqueous alkali silicate solution while maintaining said solution at a pH greater than 2 and simultaneously evaporating the organic solvent to form discrete, finely divided, tack-free elastomer particles.
The process can be applied to solid elastomers or to post-polymerization elastomer solutions, and is particularly suitable for preparing pourable, carbon black containing elastomer particles to be formed into shaped objects.
REFERENCES:
patent: 3326848 (1967-06-01), Clemens et al.
patent: 3849363 (1974-11-01), Maass et al.
patent: R25136 (1962-03-01), Carlson
Noble-Latex in Industry, (2nd Ed.) (Rubber Age) (N.Y.) (1953), pp. 357-359 and 377-381.
Morton-Introduction to Rubber Technology," (Reinhold) (N.Y.) (1959), pp. 34-39, 234-235.
Berg Gerhard
Maahs Gunter
Nordsiek Karl-Heinz
Schanzer Wilhelm
Chemische Werke Huls Aktiengesellschaft
Czaja Donald E.
Fletcher H. H.
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