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Title: Process for the production of a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder

Abstract

A process is provided for the production of a coating composition containing microcapsules having a hydrophilic core for use in the manufacture of pressure-sensitive carbonless transfer papers comprising the following steps. A hydrophilic emulsion component is prepared by dispersing at least one chromogenic material being soluble in the hydrophilic liquid. A hydrophobic emulsion component is prepared by dispersing an emulsifier in a radiation curable hydrophobic liquid. A first wall-forming material and a second wall-forming material are added to the hydrophobic emulsion component, with mixing. The first and second wall-forming materials are soluble in the hydrophobic emulsion component, and the first wall-forming material is reactive with the second wall-forming material to form a polymeric capsule wall. The resultant polymeric capsule wall is substantially insoluble in the hydrophilic and the hydrophobic emulsion components. The hydrophobic emulsion component is mixed together with the hydrophilic emulsion component to form an emulsion containing droplets of the hydrophilic emulsion component dispersed in the hydrophobic emulsion component. Mixing is maintained for a period of time sufficient to allow the first and second wall-forming materials to react to form a dispersion of microcapsules in the hydrophobic emulsion component. The formed microcapsules have capsule walls substantially impermeable to themore » hydrophobic and the hydrophilic emulsion components. Pressure-sensitive carbonless transfer paper may be produced by applying the despersion of the microcapsules prepared as above to a substrate,and curing the dispersion by subjecting the dispersion on the substrate to radiation for a period of time sufficient to cure the radiation curable hydrophobic liquid, thereby producing a tack-free, resinous film on the substrate.« less

Inventors:
;
Publication Date:
OSTI Identifier:
6340785
Patent Number(s):
US 4110511
Application Number:
TRN: 79-007067
Assignee:
Mead Corp.
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 25 May 1977
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; PAPER; SURFACE COATING; CHEMICAL RADIATION EFFECTS; ELECTRONS; POLYMERIZATION; ULTRAVIOLET RADIATION; CHEMICAL REACTIONS; CHEMISTRY; DEPOSITION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; LEPTONS; RADIATION CHEMISTRY; RADIATION EFFECTS; RADIATIONS; 400600* - Radiation Chemistry; 400500 - Photochemistry

Citation Formats

Lee, Y S, and Shackle, D R. Process for the production of a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder. United States: N. p., 1978. Web.
Lee, Y S, & Shackle, D R. Process for the production of a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder. United States.
Lee, Y S, and Shackle, D R. Tue . "Process for the production of a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder". United States.
@article{osti_6340785,
title = {Process for the production of a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder},
author = {Lee, Y S and Shackle, D R},
abstractNote = {A process is provided for the production of a coating composition containing microcapsules having a hydrophilic core for use in the manufacture of pressure-sensitive carbonless transfer papers comprising the following steps. A hydrophilic emulsion component is prepared by dispersing at least one chromogenic material being soluble in the hydrophilic liquid. A hydrophobic emulsion component is prepared by dispersing an emulsifier in a radiation curable hydrophobic liquid. A first wall-forming material and a second wall-forming material are added to the hydrophobic emulsion component, with mixing. The first and second wall-forming materials are soluble in the hydrophobic emulsion component, and the first wall-forming material is reactive with the second wall-forming material to form a polymeric capsule wall. The resultant polymeric capsule wall is substantially insoluble in the hydrophilic and the hydrophobic emulsion components. The hydrophobic emulsion component is mixed together with the hydrophilic emulsion component to form an emulsion containing droplets of the hydrophilic emulsion component dispersed in the hydrophobic emulsion component. Mixing is maintained for a period of time sufficient to allow the first and second wall-forming materials to react to form a dispersion of microcapsules in the hydrophobic emulsion component. The formed microcapsules have capsule walls substantially impermeable to the hydrophobic and the hydrophilic emulsion components. Pressure-sensitive carbonless transfer paper may be produced by applying the despersion of the microcapsules prepared as above to a substrate,and curing the dispersion by subjecting the dispersion on the substrate to radiation for a period of time sufficient to cure the radiation curable hydrophobic liquid, thereby producing a tack-free, resinous film on the substrate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {8}
}