The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1981
Filed:
Sep. 03, 1975
Adrianus J Verhoof, Maasbree, NL;
Oce-van der Grinten N.V., Venlo, NL;
Abstract
Diazotype material having a thin light-sensitive layer that is developable excellently by a limited application (1.5 to 4.5 cm.sup.3 /m.sup.2) of a buffered aqueous solution of an azo component, and which adheres well to the support even in moist condition, can be obtained by providing on a paper support a light-sensitive layer containing a binder and filler with at least one diazo compound, when the binder comprises a condensation product of an amino compound with formaldehyde, e.g. cross-linked hexamethoxymethyl-melamine, and a hydrophilic polymer crosslinkable with said product, e.g. highly hydrolyzed polyvinyl alcohol, and the filler comprises starch particles, e.g. rice starch powder, in a weight proportion to said polymer of at least 5 to 1, and even as high as 30-70 to 1. A water-sealing layer on both sides of the support, or only on a side beneath the light-sensitive layer, renders the material curl resistant.