Radiation imagery chemistry: process – composition – or product th – Imaged product – Antifraud or antitampering
Patent
1989-05-03
1990-03-13
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Imaged product
Antifraud or antitampering
430 14, 430232, 430233, 430536, 430628, G03C 554, G03C 176
Patent
active
049082868
ABSTRACT:
Image-receiving material for use in diffusion transfer reversal processing comprising a polyvinyl chloride resin support coated with a hydrophilic waterpermeable layer comprising a proteinaceous colloid and a water-dispersible ionogenic polyester-polyurethane wherein isocyanate groups still present in its structure have reacted with an ionogenic compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group. This material is useful for the production of tamper proof laminates for identification purposes.
REFERENCES:
patent: 3214274 (1965-10-01), Ohyama et al.
patent: 3397989 (1968-08-01), Keberie et al.
patent: 4388403 (1983-06-01), Helling et al.
patent: 4429032 (1984-01-01), Matthe et al.
patent: 4762759 (1988-08-01), Vermeulen et al.
De Smedt Willy P.
Kok Piet
Vermeulen Leon L.
Vervloet Ludovicus H.
Agfa-Gevaert N.V.
Daniel William J.
Schilling Richard L.
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