Microcapsular coating composition containing a hydrophobic silic

Details Microcapsular coating composition containing a hydrophobic silic Microcapsular coating composition containing a hydrophobic silic

1980-10-10

1983-08-16

Lovering, Richard D.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

282 275, 4283206, 428914, 4284022, C09D 1100, B01J 1302

Patent

active

043989543

ABSTRACT:
A novel coating composition is disclosed comprising oil-containing microcapsules dispersed in an aqueous continuous phase, which phase also contains finely divided silica particles and a binder for said microcapsules and said silica particles. The silica particles have been treated with an organic material such as an organic silicon compound to give the particles a hydrophobic surface. The coating composition has utility in the manufacture of paper coated with microcapsules. Such paper is characterized by a substantial reduction of specking when used in photocopying apparatus which utilizes a pressure nip to assist transfer of a powder image from a photoreceptor belt to the paper.
In a preferred form, the oil contains a color precursor of the electron donating type and the aqueous composition contains stilt material such as starch particles. The coating composition is applied to paper to form a transfer coating on copy paper, said copy paper having utility in the production of multi-part forms.

REFERENCES:
patent: 3076768 (1963-02-01), Boylan
patent: 3523906 (1970-08-01), Vrancken et al.
patent: 3996061 (1976-12-01), Johnson
patent: 4087376 (1978-05-01), Foris et al.
patent: 4154462 (1979-05-01), Golden et al.
patent: 4191587 (1980-03-01), Kratel et al.

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