Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Having nonreactant particles of defined size
Patent
1989-06-30
1990-08-14
Schwartz, Pamela R.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Having nonreactant particles of defined size
427152, 428327, 503200, 503226, B41M 518
Patent
active
049487728
ABSTRACT:
Substantially flat surfaced emulsion particles polymerized vinyl monomer, having a concavity in at least one of the flat surfaces, a diameter D of from 0.1 to 5.0 .mu.m, and a particle diameter thickness d ratio (d/D) of 1.2 to 5.0, prepared by the step of (1) aqueous emulsion polymerizing a first vinyl monomer or mixture of monomers (a) to form vinyl polymer seed particles; and (2) aqueous emulsion polymerizing a second vinyl monomer or mixture of monomers (b) in the presence of the vinyl polymer seed particles and a non-aqueous organic solvent having a surface tention to water at 20.degree. C. of 48 dyne/cm or more, in a weight ratio of monomer (a) to monomer (b) of 0.5/99.5 to 50/50; and are useful in high performance recording material, paint compositions and paper coating compositions.
Hoshino Futoshi
Nakano Makoto
Yanagihara Takeshi
Mitsui Toatsu Chemicals Incorporated
Schwartz Pamela R.
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