Coated abrasive containing isocyanurate binder and method of producing same
US4126428A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1977 |
| Grant date | Nov 21, 1978 |
| Priority date | — |
| Expiry date | Aug 1, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/022
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.