Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1978-09-19
1980-07-29
Pertilla, Theodore E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428262, 428436, 428460, 428528, 428530, B32B 2308, B32B 2108, B32B 2710, B32B 1508
Patent
active
042151724
ABSTRACT:
A method of preparing a resinous system, and the resinous system produced by the method is described wherein about 65-80 moles of an aldehyde such as formaldehyde, about 15-25 moles of catalyzing inorganic acid, optionally, about 3-7 moles of an alkanolamine such as triethanolamine, and about 20-30 moles of urea, are reacted to provide an aqueous resinous solution. The resinous solution will cure at room temperature or upon application of heat, permitting its use as a flexible, pliable, waterproof, non-burning coating.
REFERENCES:
patent: 2482756 (1949-09-01), Ford et al.
patent: 2628946 (1953-02-01), Juda
patent: 3816212 (1974-06-01), O'Brien
patent: 3883462 (1975-05-01), Pearson
patent: 3887511 (1975-06-01), Juneja
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