Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1978-06-05
1980-10-14
Lovering, Richard D.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
106 21, 252316, 282 275, 427 541, 427 55, 427150, 427151, 428327, 428914, B32B 326, B05D 306, B41M 312, C09D 1100
Patent
active
042282160
ABSTRACT:
The invention relates to a process for producing a radiation curable coating composition containing microcapsules having a hydrophobic liquid core as follows: An emulsion containing droplets of hydrophobic emulsion component dispersed in a hydrophilic liquid component is prepared. The hydrophobic emulsion component comprises a hydrophobic liquid and a first wall-forming material soluble therein and capable of reacting by condensation polymerization with a second wall-forming material to form a polymeric capsule wall which is substantially insoluble in, and impermeable to, the hydrophilic and hydrophobic emulsion components. The hydrophilic emulsion component comprises an emulsifier and a radiation curable hydrophilic liquid which comprises water and at least one radiation curable polar compound. The emulsion also contains the second wall-forming material. The emulsion is subjected, with stirring, to temperature conditions for a period of time sufficient to react the first and second wall-forming materials to form a dispersion of microcapsules in the hydrophilic emulsion component. The radiation curable dispersion containing a photoinitiator can be coated on a paper substrate and set by subjection to a combination of ultraviolet and infrared radiation for a period of time sufficient to polymerize the radiation curable hydrophilic liquid to a tack-free resinous film on the paper substrate.
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patent: 2800458 (1957-07-01), Green
patent: 3130050 (1964-04-01), Schwerin
patent: 3405071 (1968-10-01), Reyes
patent: 3432327 (1969-03-01), Kan et al.
patent: 3720623 (1973-03-01), Cartmell et al.
patent: 4021364 (1977-05-01), Speiser et al.
patent: 4091122 (1978-05-01), Davis et al.
patent: 4110511 (1978-08-01), Lee et al.
Austin Robert A.
Shackle Dale R.
Cagle Stephen H.
Lovering Richard D.
Palmer Wilson G.
Shane, Jr. Charles N.
The Mead Corporation
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