Process for preparing microcapsules by polymerization of urea an

Details Process for preparing microcapsules by polymerization of urea an Process for preparing microcapsules by polymerization of urea an

1979-02-14

1980-09-09

Woodberry, Edward M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252316, 260 172, 427150, 427151, 4272084, 528232, C08L 500

Patent

active

042217105

ABSTRACT:
A capsule solution is prepared by polymerizing urea and formaldehyde in the presence of gum arabic to thereby form a urea-formaldehyde resin wall around a hydrophobic oily solution. The use of gum arabic reduces the viscosity of the capsule solution, the capsule solution which is obtained is particularly suitable for preparing pressure sensitive recording sheets.

REFERENCES:
patent: 3844816 (1974-10-01), Vassiliades et al.
patent: 3993831 (1976-11-01), Vassiliades
patent: 4089802 (1978-05-01), Foris et al.
patent: 4115474 (1978-09-01), Vassiliades et al.
C.A. vol. 72:67897c, Small Polymer Capsules, Yoshida.

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