Carbon black dispersions and method of making same

Details Carbon black dispersions and method of making same Carbon black dispersions and method of making same

1974-12-11

1976-06-29

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775AP, C08L 7506, C08L 7508

Patent

active

039666689

ABSTRACT:
Porous-type carbon blacks are incorporated into flowable polyurethane polymer precursors, in amounts of 5 to 40%, based on the weight of the precursors. The mixtures, which are initially extremely viscous, are then subjected to vacuum, which treatment causes a marked decrease in the viscosity of the mixtures, so that, notwithstanding the presence of the carbon blacks, the mixtures remain sufficiently flowable for casting and other forming operations requiring ready flowability. The cured materials formed from the precursors are elastomers having physical properties reflecting a high degree of reinforcement by the carbon black.

REFERENCES:
patent: 3061574 (1962-10-01), Smith
patent: 3512183 (1970-05-01), Sharp
patent: 3523103 (1970-08-01), Zemlin
Kraus--Reinforcement of Elastomers, (Wiley) (N.Y.) (1965), pp. 324-330.
Kirk-Othmer--Encyclopedia of Chem. Techn. (2nd Ed., vol. 4) (1964) (Interscience) (N.Y.), pp. 244-247, 255, 265, 267 & 278-280.

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