Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1977-08-01
1978-11-21
Arnold, Donald J.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51298R, 51300, 51301, C09K 314
Patent
active
041264282
ABSTRACT:
In an improved coated abrasive, abrasive granules are bonded to a backing sheet by an isocyanurate resin. Bonding is accomplished by use of a one-part, latent, room-temperature stable isocyanate system trimerizable to polyisocyanurate. The trimerizable system comprises an aromatic isocyanate having dispersed throughout the liquid, mircocapsules containing a catalyst for isocyanurate formation. The microcapsules have a permeable shell wall essentially of partially polymerized aromatic isocyanate which encapsulates the liquid catalyst at room temperature but, on activation of the isocyanate-catalyst by a suitable force, the liquid catalyst permeates the shell wall, mixes with the liquid polyisocyanate, and cures the isocyanate to a fully cured thermoset isocyanurate resin.
REFERENCES:
patent: 2806772 (1957-09-01), Robie
patent: 2881065 (1959-04-01), Reuter
patent: 3502453 (1970-03-01), Baratto
patent: 3806327 (1974-04-01), Farmer
patent: 3872629 (1975-03-01), Malloy
patent: 3963458 (1976-06-01), Gladstone
patent: 4011063 (1977-03-01), Johnston
Alexander Cruzan
Arnold Donald J.
Francis Richard
Minnesota Mining and Manufacturing Company
Sell Donald M.
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